{"id":176408,"date":"2019-05-29T06:30:59","date_gmt":"2019-05-28T22:30:59","guid":{"rendered":"http:\/\/www.cailiaoniu.com\/?p=176408"},"modified":"2019-05-28T18:41:59","modified_gmt":"2019-05-28T10:41:59","slug":"%e3%80%90%e5%b7%b2%e6%a0%a1%e7%a8%bf%e3%80%91%e5%a4%8d%e6%97%a6%e5%a4%a7%e5%ad%a6nat-commun-%ef%bc%9adirac%e5%8d%8a%e9%87%91%e5%b1%9ecd3as2%e4%b8%ad%e7%9a%84%e9%82%bb%e8%bf%91%e8%af%b1%e5%af%bc","status":"publish","type":"post","link":"http:\/\/www.cailiaoniu.com\/?p=176408","title":{"rendered":"\u590d\u65e6\u5927\u5b66Nat. Commun.\uff1aDirac\u534a\u91d1\u5c5eCd3As2\u4e2d\u7684\u90bb\u8fd1\u8bf1\u5bfc\u8868\u9762\u8d85\u5bfc\u6027"},"content":{"rendered":"

\u3010\u5f15\u8a00\u3011<\/p>\n

\u5728\u8fc7\u53bb\u5341\u5e74\u91cc\uff0c\u5173\u4e8e\u62d3\u6251\u76f8\u7684\u7814\u7a76\u4e00\u76f4\u662f\u51dd\u805a\u6001\u7269\u7406\u9886\u57df\u7684\u91cd\u70b9\u95ee\u9898\u4e4b\u4e00\u3002\u5728\u62d3\u6251\u76f8\u7684\u5927\u5bb6\u65cf\u91cc\uff0c\u53ef\u7528\u79bb\u6563\u65e0\u80fd\u9699\u70b9(nodes)\u6765\u8868\u5f81\u7684\u62d3\u6251Weyl\u534a\u91d1\u5c5e\u548cDirac\u534a\u91d1\u5c5e\u53d7\u5230\u4e86\u4f17\u591a\u5173\u6ce8\u3002\u53c2\u8003Weyl\u70b9\u6216Dirac\u70b9\uff0c\u8fd9\u4e9b\u5757\u4f53\u4e2d\u7684\u65e0\u80fd\u9699\u70b9\u53ef\u88ab\u8fb9\u754c\u5904\u62d3\u6251\u4fdd\u62a4\u7684\u8868\u9762\u6001\u5f62\u6210\u7684\u5f00\u5f26\u8fde\u63a5\uff0c\u79f0\u4f5cFermi-arc\u6001\u3002\u7531\u4e8e\u5176\u53cd\u5e38\u7684\u7535\u78c1\u54cd\u5e94\uff0c\u4ee5\u53ca\u5757\u4f53\u548c\u8868\u9762Fermi-arc\u6001\u4e4b\u95f4\u6709\u8da3\u7684\u76f8\u4e92\u4f5c\u7528\uff0c\u8fd1\u5e74\u6765\u7814\u7a76\u4eba\u5458\u5f00\u5c55\u4e86\u62d3\u6251\u534a\u91d1\u5c5e\u7684\u4f17\u591a\u5de5\u4f5c\u3002\u4e0e\u62d3\u6251\u534a\u91d1\u5c5e\u7684Dirac\u6027\u8d28\u8fc5\u901f\u53d1\u5c55\u6240\u5e76\u884c\u7684\uff0c\u8fd8\u6709\u5bf9\u5176\u8d85\u5bfc\u6001\u7684\u7814\u7a76\u3002\u4e3b\u8981\u76ee\u6807\u662f\u7814\u7a76\u6f5c\u5728\u7684\u975e\u4f20\u7edf\u8d85\u5bfc\u6027\uff0c\u6709\u9884\u6d4b\u8868\u660e\uff0c\u5728\u4ee5Cd3<\/sub>As2<\/sub>\u4e3a\u4f8b\u7684Dirac\u534a\u91d1\u5c5e\u4e2d\u7684Fermi-arc\u6001\u4e2d\u53ef\u53d1\u73b0\u9a6c\u7ea6\u62c9\u7eb3\u5e73\u5e26\uff08Majorana flat band\uff09\uff0c\u8fdb\u800c\u7814\u7a76\u5176\u62d3\u6251\u8d85\u5bfc\u7279\u6027\uff0c\u5b9e\u73b0\u9a6c\u7ea6\u62c9\u7eb3\u8d39\u7c73\u5b50\uff0c\u5e76\u8fdb\u4e00\u6b65\u5e94\u7528\u4e8e\u62d3\u6251\u91cf\u5b50\u8ba1\u7b97\u4e2d\u3002<\/p>\n

\u3010\u6210\u679c\u7b80\u4ecb\u3011<\/p>\n

Cd3<\/sub>As2<\/sub>\u662f\u4e00\u7c7b\u4e09\u7ef4\u72c4\u62c9\u514b\u534a\u91d1\u5c5e\uff0c\u5728\u52a8\u91cf\u7a7a\u95f4\u5177\u6709\u5206\u7acb\u7684Dirac\u70b9\u3002\u5c3d\u7ba1\u9488\u5bf9\u5176\u5947\u5f02\u6027\u8d28\u5df2\u5f00\u5c55\u8fc7\u591a\u9879\u8f93\u8fd0\u548c\u5149\u8c31\u5b66\u7814\u7a76\uff0c\u4f46\u5b9e\u9a8c\u4e0a\u76ee\u524d\u5e76\u6ca1\u6709\u5b9e\u9a8c\u5b8c\u5168\u8bc1\u5b9e\u5176\u8868\u9762\u6001\u7684\u8d85\u5bfc\u5f62\u5f0f\u3002\u8fd1\u65e5\uff0c\u590d\u65e6\u5927\u5b66\u4fee\u53d1\u8d24\u6559\u6388\uff08\u901a\u8baf\u4f5c\u8005\uff09\u8bfe\u9898\u7ec4<\/strong>\u5728Nature Communications<\/strong>\u4e0a\u53d1\u8868\u4e86\u9898\u4e3a\u201cProximity-induced surface superconductivity in Dirac semimetal Cd3<\/sub>As2<\/sub><\/strong>\u201d\u7684\u6587\u7ae0\uff0c\u8be5\u5de5\u4f5c\u7531\u590d\u65e6\u5927\u5b66\u3001\u9999\u6e2f\u79d1\u6280\u5927\u5b66\u3001\u4e2d\u79d1\u9662\u6c88\u9633\u91d1\u5c5e\u6240\u3001\u5317\u4eac\u5927\u5b66\u3001\u6fb3\u5927\u5229\u4e9a\u6606\u58eb\u5170\u5927\u5b66\u3001\u5317\u4eac\u5de5\u4e1a\u5927\u5b66\u3001\u5148\u8fdb\u5fae\u7ed3\u6784\u534f\u540c\u521b\u65b0\u4e2d\u5fc3\u591a\u5bb6\u5355\u4f4d\u5408\u4f5c\u5b8c\u6210\u3002\u6587\u7ae0\u62a5\u9053\u4e86Nb\/Cd3<\/sub>As2<\/sub> \u6742\u5316\u7ed3\u6784\u4e2d\u7684\u90bb\u8fd1\u8bf1\u5bfc\u8868\u9762\u8d85\u5bfc\u6027\u3002\u56db\u7aef\u8f93\u8fd0\u6d4b\u91cf\u8bc6\u522b\u51fa\u8868\u9762\u5904\u663e\u8457\u7684\u90bb\u8fd1\u8bf1\u5bfc\u5bf9\u80fd\u9699\uff0c\u5728\u5fae\u5206\u7535\u5bfc\u8c31\u4e2d\u4f53\u73b0\u4e3a\u5e73\u6574\u7684\u7535\u5bfc\u5e73\u53f0\uff0c\u4e14\u4e0e\u7406\u8bba\u6a21\u62df\u7ed3\u679c\u76f8\u7b26\u3002\u5728\u9762\u5916\/\u9762\u5185\u78c1\u573a\u4e0b\uff0cNb\/Cd3<\/sub>As2<\/sub>\/Nb\u7ed3\u7684\u8d85\u5bfc\u7535\u6d41\u4e5f\u76f8\u5e94\u8fbe\u5230\u4e86\u7c7bFraunhofer\/SQUID\u6a21\u5f0f\u3002\u5408\u6210\u5206\u5e03\u56fe\u663e\u793a\u968f\u7740\u5757\u4f53\u5185\u8f7d\u6d41\u5b50\u8017\u5c3d\u548c\u8868\u9762\u6001\u4e0e\u8d85\u5bfc\u66f4\u5f3a\u7684\u8026\u5408\uff0c\u8d85\u5bfc\u7535\u6d41\u5206\u5e03\u4e3b\u8981\u5904\u4e8e\u5757\u4f53\u7684\u4e0a\u4e0b\u8868\u9762\uff0c\u53ef\u89c6\u4e3a\u548c\u4e8c\u7ef4\u91cf\u5b50\u81ea\u65cb\u970d\u5c14\u7edd\u7f18\u4f53\u4e2d\u7c7b\u4f3c\u7684\u66f4\u9ad8\u7ef4\u5ea6\u7684\u8fb9\u754c\u8d85\u5bfc\u7535\u6d41\u3002<\/p>\n

\u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/p>\n

\u56fe1\uff1aNb\/Cd3<\/sub>As2<\/sub> \u5f02\u8d28\u7ed3\u90bb\u8fd1\u8bf1\u5bfc\u8d85\u5bfc\u6027\u548c\u5fae\u5206\u7535\u5bfc\u8c31\u3002<\/p>\n

\"\"(a)\u5e26\u6709\u6d4b\u91cf\u65b9\u6cd5\u7684\u5668\u4ef6\uff08#1\uff09\u4f2a\u5f69\u8272\u626b\u63cf\u7535\u5b50\u663e\u5fae\u955c\u56fe\u7247\uff1b<\/p>\n

(b)2K\u65f6\u5fae\u5206\u7535\u5bfc\u8c31\uff08\u7d2b\u7ebf\uff09\u4e0e\u7535\u67813\u3001\u7535\u67815\u4e4b\u95f4\u754c\u9762\u7535\u963b\u7684\u5f52\u4e00\u5316R-T\u66f2\u7ebf\uff08\u9ed1\u7ebf\uff09\u4e4b\u95f4\u7684\u5173\u7cfb\uff1bRT\u66f2\u7ebf\u4e2d\u5171\u6709\u4e09\u4e2a\u76f8\u53d8\u53d1\u751f\uff0c\u5176\u4e2d\u4f4d\u4e8e8.4K\u7684 Tc1<\/sub>\u4e0eNb\u7684\u8d85\u5bfc\u76f8\u53d8\u6e29\u5ea6\u7b26\u5408\uff08\u540e\u9762\u8bc1\u5b9e\u4e3a\u8868\u9762\u6001\u7684\u8d85\u5bfc\uff09\uff0c Tc2<\/sub>~8.2K\u4e3a\u4f53\u6001\u8d85\u5bfc\u7684\u6e29\u5ea6\uff08\u5728\u5185\u63d2\u56fe\u4e2d\u653e\u5927\u8be5\u533a\u57df\u540e\u80fd\u8f83\u4e3a\u660e\u663e\u7684\u88ab\u89c2\u5bdf\u5230\uff09\uff0c\u800cTc2<\/sub>~4.0K\u5bf9\u5e94\u53e6\u4e00\u4e2a\u8d85\u5bfc\u8fd1\u90bb\u6548\u5e94\u3002\u8fd9\u4e09\u4e2a\u76f8\u53d8\u6240\u5bf9\u5e94\u7684\u7535\u963b\u7a81\u53d8\u5927\u5c0f\u5747\u53ef\u4e0edI<\/em>\/dV<\/em>\u4e2d\u4e0d\u540c\u7684\u6027\u8d28\u6240\u5bf9\u5e94\uff1b<\/p>\n

(c)\u754c\u9762\u7535\u963bR<\/em>Interface<\/sub>\u7684\u96f6\u573a\u6e29\u5ea6\u76f8\u5173dI<\/em>\/dV<\/em>\u66f2\u7ebf\uff0c\u4f7f\u75289K\u65f6\u57fa\u6001\u7535\u5bfc\u8fdb\u884c\u5f52\u4e00\u5316\uff0c\u7535\u5bfc\u7684\u5e73\u53f0\uff08BICP\uff09\u548c\u96f6\u504f\u538b\u7535\u5bfc\u5cf0\uff08ZBBP\uff09\u5747\u968f\u7740\u6e29\u5ea6\u53d8\u4f4e\u800c\u53d8\u5927\uff0c\u9ed1\u8272\u5b9e\u7ebf\u4e3a\u7528BTK\u6a21\u578b\u62df\u5408\u7684ZBBP\uff0c\u4ece\u800c\u8bc1\u660eZBBP\u6765\u81ea\u5b89\u5fb7\u70c8\u592b\u53cd\u5c04\uff08Andreev reflection\uff09\uff1b<\/p>\n

(d)2K\u5904\u754c\u9762\u7535\u963bR<\/em>Interface<\/sub>\u7684\u78c1\u573a\u76f8\u5173dI<\/em>\/dV<\/em>\u66f2\u7ebf\uff0c\u4f7f\u75289K\u65f6\u57fa\u6001\u7535\u5bfc\u8fdb\u884c\u5f52\u4e00\u5316\uff0c\u53ef\u89c2\u5bdf\u5230BICP\u548cZBBP\u968f\u78c1\u573a\u53d8\u5927\u5747\u53d8\u5c0f\uff0c\u9ed1\u8272\u5b9e\u7ebf\u4e3aBTK\u6a21\u578b\u62df\u5408\u7684\u7ed3\u679c\uff1b<\/p>\n

(e)\u0394s<\/sub>\u548c\u0394d<\/sub>\u00a0\u968f\u6e29\u5ea6\u7684\u53d8\u5316\u5173\u7cfb\uff0c\u865a\u7ebf\u662f\u7528BCS\u62df\u5408\u5f97\u5230\u7684\uff0c\u8bf4\u660e\u8fd1\u90bb\u6548\u5e94\u4ea7\u751f\u7684Cd3<\/sub>As2<\/sub>\u7684\u8d85\u5bfc\u80fd\u9699\u662f\u7b26\u5408s-wave\u7684\uff1b<\/p>\n

(f)\u0394s<\/sub>\u548c\u0394d<\/sub>\u00a0\u968f\u78c1\u573a\u7684\u53d8\u5316\u5173\u7cfb\uff0c\u865a\u7ebf\u662f\u7528BCS\u62df\u5408\u5f97\u5230\u7684\uff0c\u5185\u63d2\u56fe\u8868\u660e\u78c1\u573a\u65b9\u5411\u5782\u76f4\u4e8eNb\/Cd3<\/sub>As2<\/sub>\u5e73\u9762\u3002<\/p>\n

\u56fe2\uff1a\u901a\u8fc7\u63a7\u5236Cd3<\/sub>As2<\/sub>\u539a\u5ea6\u5f97\u5230\u4e0d\u540c\u5757\u4f53\/\u8868\u9762\u901a\u9053\u6bd4\u91cd\uff0c\u8fdb\u4e00\u6b65\u6d4b\u5f97Cd3<\/sub>As2<\/sub>\u4e2d\u7684dI<\/em>\/dV<\/em>\u66f2\u7ebf\u3002<\/p>\n

\"\"<\/p>\n

(a.b) \u4e24\u4e2a\u4f53\u7cfb\u7531\u9876\u90e8\u81f3\u5e95\u90e8\u7684\u5f02\u8d28\u7ed3\u793a\u610f\u56fe\uff1a\u7531\u4e8e\u90bb\u8fd1\u8bf1\u5bfc\u8d85\u5bfc\u6027\u5757\u4f53\u548c\u8868\u9762\u901a\u9053\u5171\u5b58\uff0c\u8d85\u5bfc\u5e8f\u53c2\u91cf\u5728Cd3<\/sub>As2<\/sub>\u79bb\u754c\u9762\u4e0d\u540c\u8ddd\u79bb\u7684\u533a\u57df\u6709\u4e0d\u540c\u5e45\u5ea6\u7684\u8870\u51cf\uff1b<\/p>\n

(c-f) 2K\u65f6\uff0c#01\uff0c#02\uff0c#03\uff0c#04\u5668\u4ef6\u4e2d\u754c\u9762\u7535\u963b\u7684\u5f52\u4e00\u5316\u5fae\u5206\u7535\u5bfc\u8c31\uff1b\u5176\u4e2dc-d\u5668\u4ef6\u4e2d\u4f53\u6001\u548c\u8868\u9762\u6001\u5171\u5b58\uff0c\u8868\u73b0\u51faBICP\u548cZBBP\u5171\u5b58\uff0c\u800ce-f\u4e2dCd3<\/sub>As2<\/sub>\u7531\u8868\u9762\u6001\u8f7d\u6d41\u5b50\u5360\u4e3b\u5bfc\uff0c\u8868\u73b0\u51fa\u6bd4\u8f83\u5bbd\u7684BICP\u548c\u76f8\u5bf9\u5ffd\u7565\u4e0d\u8ba1\u7684ZBBP\u3002\u5185\u63d2\u56fe\u4e3a\u56db\u4e2a\u5668\u4ef6\u7684SEM\u793a\u610f\u56fe\u3002<\/p>\n

(g)<\/sub>\u0394s<\/sub>\u548c\u0394b<\/sub> \u968f\u8868\u9762\u632f\u8361\/\u5757\u4f53\u632f\u8361\u76f8\u5bf9\u5e45\u5ea6\u53d8\u5316\u60c5\u51b5\u3002<\/p>\n

\u56fe3\uff1aNb\/Cd3<\/sub>As2<\/sub> \u5f02\u8d28\u7ed3\u4e2ddI<\/em>\/dV<\/em>\u548c\u8d85\u5bfc\u90bb\u8fd1\u6548\u5e94\u7684\u6570\u503c\u6a21\u62df\u3002<\/p>\n

\"\"(a)\u8868\u793aNb\/Cd3<\/sub>As2<\/sub>\u7ed3\u4e2dAndreev\u53cd\u5c04\u548c\u8d85\u5bfc\u90bb\u8fd1\u6548\u5e94\u7684\u7b80\u8981\u793a\u610f\u56fe\uff1b\u5f53\u8d85\u5bfcNb\u5c42\u8986\u76d6\u5728Cd3<\/sub>As2<\/sub>\u8868\u9762\u4e0a\u65f6\uff0c\u8fd1\u90bb\u6548\u5e94\u4ea7\u751f\u7684\u5e93\u73c0\u5bf9\u4f1a\u540c\u65f6\u5b58\u5728\u4e0e\u4f53\u6001\u548c\u8868\u9762\u6001\u4e2d\uff1b\u7ea2\u8272\u548c\u84dd\u8272\u7684\u5c0f\u7403\u4ee3\u8868\u4e86\u4e0d\u540c\u81ea\u65cb\u65b9\u5411\u7684\u7535\u5b50\u548c\u7a7a\u7a74\uff0c\u865a\u7ebf\u4ee3\u8868\u4e86Andreev\u53cd\u5c04\u7684\u8fc7\u7a0b\uff1b<\/p>\n

(b,c) Nb\/Cd3<\/sub>As2<\/sub>\u7ed3\u4e2d\u5f52\u4e00\u5316Andreev\u53cd\u5c04\u632f\u5e45\u7684\u6570\u503c\u8ba1\u7b97\u3002\u5176\u4e2db\u56fe\u4e2dCd3<\/sub>As2<\/sub>\u7684\u8d39\u7c73\u9762\u5728Dirac\u70b9\u9644\u8fd1\uff08EF<\/sub>=0 \uff09\uff0c\u4e3b\u8981\u7531\u8868\u9762\u6001\u53c2\u4e0eAndreev\u53cd\u5c04\u8fc7\u7a0b\uff0c\u53ea\u6709BICP\u6ca1\u6709ZBBP\uff1b\u800cc\u56fe\u4e2dCd3<\/sub>As2<\/sub>\u7684\u8d39\u7c73\u9762\u8fdc\u79bbDirac\u70b9\uff08EF<\/sub> = 70 meV \uff09\uff0c\u8868\u9762\u6001\u548c\u4f53\u6001\u5171\u540c\u53c2\u4e0eAndreev\u53cd\u5c04\u8fc7\u7a0b\uff0cBICP\u548cZBBP\u5728\u5fae\u5206\u7535\u5bfc\u8c31\u4e2d\u5171\u5b58\uff1b<\/p>\n

(d)\u8d85\u5bfcNb\u805a\u96c6\u5e76\u5c06\u8fd1\u90bb\u6548\u5e94\u4f5c\u7528\u4e8eCd3<\/sub>As2<\/sub>\u8868\u9762\u540eCd3<\/sub>As2<\/sub>\u4e0a\u8868\u9762\u7684\u6001\u5bc6\u5ea6\u5206\u5e03\u56fe\uff08EF<\/sub> = 70 meV\uff09\u3002\u5927\u7684\u8d85\u5bfc\u5e26\u9699 \u6765\u81ea\u8d39\u7c73\u5f27\u8868\u9762\u6001\uff08\u5bf9\u5e94\u4e86\u8868\u9762\u7684\u9ad8\u5c40\u57df\u6001\u5bc6\u5ea6\uff09\uff0c\u800c\u5c0f\u7684\u5e26\u9699 \u6765\u81ea\u4f53\u6001\uff08\u5bf9\u5e94\u4e86\u8868\u9762\u7684\u4f4e\u5c40\u57df\u6001\u5bc6\u5ea6\uff09\u3002<\/p>\n

\u56fe4\uff1aNb\/Cd3<\/sub>As2<\/sub>\/Nb Josephson\u7ed3\u7684\u8868\u5f81\u3002<\/p>\n

\"\"(a)\u57fa\u4e8e140nm\u539aNb(\u88c5\u7f6e#06)\u7684120nm\u539aCd3<\/sub>As2<\/sub>\u7eb3\u7c73\u7247\u7ec4\u6210Josephson\u7ed3\u7684\u626b\u63cf\u7535\u5b50\u663e\u5fae\u955c\u56fe\u7247\uff1b<\/p>\n

(b)\u7528\u56db\u7aef\u8f93\u8fd0\u6cd5\u6d4b\u5f97\u8be5Cd3<\/sub>As2 <\/sub>Josephson\u7ed3\u7535\u963b\u968f\u6e29\u5ea6\u7684\u7279\u6027\uff0c\u57281K\u5de6\u53f3\uff0c\u7ed3\u7535\u963b\u964d\u52300\uff0c\u53d1\u751f\u4e86Josephson\u6548\u5e94\u3002\u901a\u8fc7Halperin\u2013Nelson \u65b9\u7a0b\u62df\u5408\u5f97\u5230\u5176\u8d85\u5bfc\u8f6c\u53d8\u7b26\u5408\u4e8c\u7ef4\u8d85\u5bfc\u7279\u5f81\uff0c\u7531\u4e8eCd3<\/sub>As2<\/sub>\u539a\u5ea6\u5df2\u8fdc\u5927\u4e8e\u4e8c\u7ef4\u7684\u8303\u7574\uff0c\u8be5\u7ed3\u679c\u662f\u8868\u9762\u8d85\u5bfc\u7684\u8bc1\u636e\uff1b<\/p>\n

(c)50mK\u4e0b\u96f6\u78c1\u573a\u73af\u5883\u4e2d\uff0c\u5904\u4e8e\u8d85\u5bfc\u6001\u7684Josephson\u7ed3\uff08\u4e34\u754c\u7535\u6d41I<\/em>c<\/sub>\u4e3a1\u03bcA\uff09\u7684I<\/em>–V<\/em>\u7279\u5f81\u66f2\u7ebf\u3002<\/p>\n

\u56fe5\uff1aJosephson\u7ed3\u8d85\u5bfc\u7535\u6d41\u5bc6\u5ea6\u7684\u7279\u6027\u3002<\/p>\n

\"\"(a)\u5de6\u56fe\u4e3a\u78c1\u573a\u6cbf\u5e73\u9762\u5916\u65b9\u5411\u7684Josephson\u7ed3\u793a\u610f\u56fe\uff0c\u6cbf\u7740x\u65b9\u5411Cd3<\/sub>As2<\/sub>\u4e2d\u5145\u6ee1\u4e86\u8d85\u5bfc\u7535\u6d41\uff0c\u5e76\u4e14\u6cbfz\u8f74\u65b9\u5411\u7535\u6d41\u5bc6\u5ea6\u5747\u5300\u5206\u5e03\uff1b\u53f3\u56fe\u4e3a\u5bf9\u5e94\u7684\u4e34\u754c\u7535\u6d41\u968f\u7740\u78c1\u573a\u7684\u5173\u7cfb\u5206\u5e03\uff0c\u7b26\u5408Fraunhofer\u6a21\u5f0f\uff1b<\/p>\n

(b)\u5de6\u56fe\u4e3a\u78c1\u573a\u6cbf\u5e73\u9762\u5185\uff08z\u8f74\uff09\u65b9\u5411\u7684Josephson\u7ed3\u793a\u610f\u56fe\uff0c\u8d85\u5bfc\u7535\u6d41\u5bc6\u5ea6\u6cbf\u7740y\u65b9\u5411\u7535\u6d41\u5bc6\u5ea6\u4e0d\u5747\u5300\uff0c\u4e3b\u8981\u96c6\u4e2d\u4e8e\u4e0a\u4e0b\u8868\u9762\uff1b\u53f3\u56fe\u4e3a\u5bf9\u5e94\u7684\u4e34\u754c\u7535\u6d41\u968f\u7740\u78c1\u573a\u7684\u5173\u7cfb\u5206\u5e03\uff0c\u7b26\u5408SQUID\u6a21\u5f0f\uff1b<\/p>\n

(c)35mK\u65f6\u7ea6\u745f\u592b\u68ee\u7ed3\u7684\u5fae\u5206\u7535\u963b\u968f\u78c1\u573a\u5206\u5e03\u60c5\u51b5\uff0c\u8868\u73b0\u51fa\u5355\u7f1d\u5e72\u6d89\u7684\u5747\u4e00\u8d85\u5bfc\u7535\u6d41\u5bc6\u5ea6\u7279\u5f81\uff1b<\/p>\n

(d)\u56fe(c)\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u53cd\u5085\u91cc\u53f6\u53d8\u6362\u5f97\u5230\u6cbfz\u8f74\u7684\u8d85\u5bfc\u7535\u6d41\u5206\u5e03\uff0c\u6574\u4e2a\u533a\u57df\u91cc\u7535\u6d41\u5bc6\u5ea6\u5747\u4e0d\u4e3a0\uff0c\u8bf4\u660e\u4e86\u8d85\u5bfc\u7535\u6d41\u6cbfz\u65b9\u5411\u5206\u5e03\u8f83\u5747\u5300\uff1b<\/p>\n

(e)\u78c1\u573a\u6cbf\u5e73\u9762\u5185\u65b9\u5411\u65f6\u7684\u5fae\u5206\u7535\u963b\u5206\u5e03\uff0c\u4e34\u754c\u7535\u6d41\u5927\u5c0f\u4e0e\u78c1\u573a\u5173\u7cfb\u8868\u73b0\u51fa\u7c7bSQUID\u6a21\u5f0f\uff1b<\/p>\n

(f)\u56fe(e)\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u53cd\u5085\u91cc\u53f6\u53d8\u6362\u5f97\u5230\u6cbfy\u8f74\u7684\u8d85\u5bfc\u7535\u6d41\u5206\u5e03\uff0c\u8d85\u5bfc\u7535\u6d41\u96c6\u4e2d\u4e0e\u4e24\u7aef\uff0c\u4e5f\u5c31\u662f\u4e0a\u4e0b\u8868\u9762\uff0c\u8bc1\u660e\u4e86\u8868\u9762\u533a\u57df\u7684\u8d85\u5bfc\u7535\u6d41\uff0c\u800c\u4f53\u5185\u8d85\u5bfc\u7535\u6d41\u5bc6\u5ea6\u5f88\u5c0f\u3002\u540c\u65f6\u7528\u9ad8\u65af\u5206\u5e03\u62df\u5408\u51fa\u4e86\u4e0a\u4e0b\u8868\u9762\u901a\u9053\u7684\u539a\u5ea6\u5927\u7ea6\u4e3a 13~14\u03bcm\u3002<\/p>\n

\u56fe6\uff1a\u8d85\u5bfc\u7684Cd3<\/sub>As2<\/sub> Fermi arc\u6001\u7684\u793a\u610f\u56fe\u3002<\/p>\n

\"\"<\/p>\n

\u3010\u5c0f\u7ed3\u3011<\/p>\n

\u57fa\u4e8e\u90bb\u8fd1\u8bf1\u5bfc\u8d85\u5bfc\u80fd\u9699\u548c\u8868\u9762\u8d85\u5bfc\u7535\u6d41\u7a7a\u95f4\u5206\u5e03\u8fd9\u4e24\u4e2a\u7279\u6027\u7684\u7814\u7a76\uff0c\u8be5\u5de5\u4f5c\u62a5\u9053\u4e86\u5bf9Cd3<\/sub>As2<\/sub>\u8868\u9762\u5f3a\u90bb\u8fd1\u8bf1\u5bfc\u8d85\u5bfc\u6027\u7684\u89c2\u6d4b\u3002\u901a\u8fc7\u5bf9Nb\/Cd3<\/sub>As2<\/sub>\u5f02\u8d28\u7ed3\u7684\u8f93\u8fd0\u6d4b\u91cf\uff0c\u53ef\u4ee5\u89c2\u5bdf\u5230\u8868\u9762\u5904\u663e\u8457\u7684\u90bb\u8fd1\u8bf1\u5bfc\u80fd\u9699(\u0394s<\/sub> )\uff0c\u5176\u5927\u5c0f\u76f8\u5f53\u4e8eNb\u7684\u8d85\u5bfc\u5e26\u9699\u3002\u76f8\u5f53\u5927\u7684\u8868\u9762\u90bb\u8fd1\u5e26\u9699\u5bf9\u5e94\u5728\u5fae\u5206\u7535\u5bfc\u8c31\u4e2d\u662f\u4e00\u4e2a\u5e73\u6ed1\u7684\u7535\u5bfc\u5e73\u53f0\u3002\u6bd4\u8f83\u6765\u770b\uff0c\u5757\u4f53\u7684\u90bb\u8fd1\u80fd\u9699\u8981\u5c0f\u5f97\u591a(\u0394b<\/sub>~0.14<\/span>\u0394s<\/sub> )\uff0c\u5bf9\u5e94\u5fae\u5206\u7535\u5bfc\u8c31\u4e2d\u7684\u96f6\u504f\u538b\u5bbd\u5cf0\u3002\u8fdb\u4e00\u6b65\u7684\u7406\u8bba\u8ba1\u7b97\u8bc1\u5b9e\u4e86\u89c2\u5bdf\u6240\u5f97\u7684\u7535\u5bfc\u5e73\u53f0\/ZBBP\u548c\u8868\u9762\/\u5757\u4f53\u6001\u4e2d\u90bb\u8fd1\u8bf1\u5bfc\u80fd\u9699\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u901a\u8fc7\u6539\u53d8\u4e0d\u540c\u539a\u5ea6\u7684Cd3<\/sub>As2<\/sub>\u6837\u54c1\u4e2d\u8868\u9762\/\u4f53\u6001\u6bd4\u91cd\uff0c\u7535\u5bfc\u5e73\u53f0\/ZBBP\u7684\u5927\u5c0f\u6bd4\u91cd\u8868\u73b0\u51fa\u5bf9\u5e94\u7684\u53d8\u5316\u3002\u6b64\u5916\uff0c\u4f7f\u7528\u8d85\u5bfc\u91cf\u5b50\u5e72\u6d89\u6d4b\u91cfNb\/Cd3<\/sub>As2<\/sub>\/Nb Josephson\u7ed3\uff0c\u5728\u8868\u9762\u6001\u4e3b\u5bfcCd3<\/sub>As2<\/sub> Josephson\u7ed3\u4e2d\u89c2\u5bdf\u5230SQUID\u6a21\u5f0f\uff0c\u8868\u660e\u8d85\u5bfc\u7535\u6d41\u4e3b\u8981\u96c6\u4e2d\u5728Cd3<\/sub>As2<\/sub>\u7684\u4e0a\u4e0b\u8868\u9762\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1aProximity-induced surface superconductivity in Dirac semimetal Cd3<\/sub>As2<\/sub><\/a>\uff08Nat. Commun. 2019\uff0c10(1): 2217\uff09<\/p>\n

\u56e2\u961f\u4ecb\u7ecd\uff1a<\/div>\n
\u4fee\u53d1\u8d24\u8bfe\u9898\u7ec4\u4e3b\u8981\u4ece\u4e8b\u62d3\u6251\u6750\u6599\u7684\u751f\u957f\u3001\u91cf\u5b50\u8c03\u63a7\u4ee5\u53ca\u65b0\u578b\u4f4e\u7ef4\u539f\u5b50\u6676\u4f53\u6750\u6599\u7684\u5668\u4ef6\u7814\u7a76\u3002\u5728\u72c4\u62c9\u514b\u6750\u6599\u65b9\u9762\u81f4\u529b\u4e8e\u65b0\u578b\u91cf\u5b50\u6750\u6599\u7684\u751f\u957f\u3001\u7269\u6027\u6d4b\u91cf\u4ee5\u53ca\u91cf\u5b50\u5668\u4ef6\u7684\u5236\u5907\u4e0e\u8868\u5f81\u3002\u5728\u65b0\u578b\u4f4e\u7ef4\u539f\u5b50\u6676\u4f53\u6750\u6599\u7684\u5668\u4ef6\u65b9\u9762\u4e3b\u8981\u7814\u7a76\u5176\u7535\u5b66\u3001\u78c1\u5b66\u548c\u5149\u7535\u7279\u6027\u3002<\/div>\n
\u00a0<\/div>\n
\u5de5\u4f5c\u6c47\u603b\uff1a<\/div>\n
\u4fee\u53d1\u8d24\u8bfe\u9898\u7ec4\u4e3b\u8981\u5229\u7528\u5206\u5b50\u675f\u5916\u5ef6\u7b49\u8bbe\u5907\u9488\u5bf9\u62d3\u6251\u534a\u91d1\u5c5e\u3001\u78c1\u6027\u6750\u6599\u3001\u62d3\u6251-\u8d85\u5bfc\u5f02\u8d28\u7ed3\u4e2d\u7684\u4e00\u7cfb\u5217\u91cd\u8981\u95ee\u9898\u8fdb\u884c\u4e86\u7cfb\u7edf\u6df1\u5165\u7684\u7814\u7a76\u3002\u8fd1\u671f\u7684\u7814\u7a76\u6210\u679c\u5305\u62ec\u5b9e\u73b0\u7837\u5316\u9549\u7684\u4e09\u7ef4\u6574\u6570\u91cf\u5b50\u970d\u5c14\u6548\u5e94\uff0c\u7837\u5316\u94cc\u7684\u8d85\u9ad8\u8868\u9762\u7535\u5bfc\u7387\uff0c\u7837\u5316\u9549\u7684\u5ba4\u6e29\u624b\u6027\u7535\u5b50\uff0c\u7837\u5316\u9549\u9ad8\u573a\u4e0b\u7684\u5916\u5c14\u76f8\u53d8\uff0c<\/a>\u78b2\u5316\u9506\u9ad8\u573a\u4e0b\u7684\u7535\u5b50\u81ea\u65cb\u5bc6\u5ea6\u6ce2\uff0c\u7837\u5316\u9549\u7684\u9971\u548c\u5438\u6536\u7279\u6027\uff0c\u7837\u5316\u94cc\u7684\u72ec\u7279\u78c1\u5149\u73b0\u8c61\u548c\u51c6\u4e00\u7ef4\u8d85\u5bfc\u4f53\u4e2d\u7684\u683c\u91cc\u83f2\u65af\u5947\u5f02\u6027\u3002\u6210\u679c\u53d1\u8868\u4e8eNature, Nature Materials, Nature Communications \u7b49\u6742\u5fd7\u3002<\/div>\n
\u00a0<\/div>\n
\u6587\u732e\u63a8\u8350\uff1a<\/div>\n
\n

1)\u00a0 \u00a0 Cheng Zhang, Yi Zhang, Xiang Yuan, Shiheng Lu, Jinglei Zhang, Awadhesh Narayan, Yanwen Liu, Huiqin Zhang, Zhuoliang Ni, Ran Liu, Eun Sang Choi, Alexey Suslov, Stefano Sanvito, Li Pi, Hai-Zhou Lu, Andrew C. Potter, Faxian Xiu, \u201cQuantum Hall effect based on Weyl orbits in Cd3<\/sub>As2<\/sub><\/a>\u201c, Nature, 565, 331\u2013336(2019).<\/p>\n

2)\u00a0 \u00a0 Cheng Zhang, Zhuoliang Ni, Jinglei Zhang, Xiang Yuan, Yanwen Liu, Yichao Zou, Zhiming Liao, Yongping Du, Awadhesh Narayan, Hongming Zhang, Tiancheng Gu, Xuesong Zhu, Li Pi, Stefano Sanvito, Xiaodong Han, Jin Zou, Yi Shi, Xiangang Wan, Sergey Y. Savrasov and Faxian Xiu, \u201cUltrahigh conductivity in Weyl semimetal NbAs nanobelts<\/a>\u201c, Nature Materials 18, 482 (2019).<\/p>\n

3)\u00a0 \u00a0 Ce Huang, Benjamin T. Zhou, Huiqin Zhang, Bingjia Yang, Ran Liu, Hanwen Wang, Yimin Wan, Ke Huang, Zhiming Liao, Enze Zhang, Shanshan Liu, Qingsong Deng, Yanhui Chen, Xiaodong Han, Jin Zou, Xi Lin, Zheng Han, Yihua Wang, Kam Tuen Law, Faxian Xiu, \u201cProximity induced surface superconductivity in Dirac semimetal Cd3As2\u201d, Nature Communications 10, 2217 (2019).<\/p>\n

4)\u00a0 \u00a0 Enze Zhang, Jinhua Zhi, Yichao Zou, Zefang Ye, Linfeng Ai, Jiacheng Shi, Ce Huang, Shanshan Liu, Zehao Lin, Xinyuan Zheng, Ning Kang, Hongqi Xu, Wei Wang, Liang He, Jin Zou, Jinyu Liu, Zhiqiang Mao, Faxian Xiu, \u201cSignature of quantum Griffiths singularity state in a layered quasi-one dimensional superconductor<\/a>\u201d, Nature Communications 9, 4656 (2018).<\/p>\n

5)\u00a0 \u00a0 Xiang Yuan, Zhongbo Yan, Chaoyu Song, Mengyao Zhang, Zhilin Li, Cheng Zhang, Yanwen Liu, Weiyi Wang, Minhao Zhao, Zefang Ye, Jiaxiang Wang, Jonathan Ludwig, Xiaoxing Zhang, Cui Shang, Zhengcai Xia, Dmitry Serminov, Xiaolong Chen, Zhong Wang, Hugen Yan, Faxian Xiu, \u201cChiral Landau levels in Weyl semimetal NbAs with multiple topological carriers<\/a>\u201d, Nature Communications 9, 1854 (2018).<\/p>\n

6)\u00a0 \u00a0 Cheng Zhang, Awadhesh Narayan, Shiheng Lu, Jinglei Zhang, Xiang Yuan, Yanwen Liu, Ju-Hyun Park, Enze Zhang, Weiyi Wang, Shanshan Liu, Long Cheng, Li Pi, Zhigao Sheng, Stefano Sanvito, Faxian Xiu, \u201cEvolution of Weyl-orbit and quantum Hall effect in Dirac semimetal Cd3<\/sub>As2<\/sub><\/a>\u201d, Nature Communications 8, 1272 (2017)<\/p>\n

7)\u00a0 \u00a0 Chunhui Zhu, Fengqiu Wang*, Yafei Meng, Xiang Yuan, Faxian Xiu*, Hongyu Luo, Yazhou Wang, Jianfeng Li, Xinjie Lv, Liang He, Yongbing Xu, Junfeng Liu, Chao Zhang, Yi Shi, Rong Zhang, Shining Zhu, \u201cA robust and tuneable mid-wave infrared optical switch enabled by bulk Dirac fermions<\/a>\u201d, Nature Communications 8, 14111 (2017).<\/p>\n

8)\u00a0 \u00a0 Cheng Zhang, Enze Zhang, Weiyi Wang, Yanwen Liu, Zhi-Gang Chen, Shiheng Lu, Sihang Liang, Junzhi Cao, Xiang Yuan, Lei Tang, Qian Li, Chao Zhou, Teng Gu, Yizheng Wu, Jin Zou, Faxian Xiu, \u201cRoom-temperature chiral charge pumping in Dirac semimetal<\/a>\u201d, Nature Communications 8, 1374 (2017).<\/p>\n

9)\u00a0 \u00a0 Yanwen Liu, Xiang Yuan, Cheng Zhang, Zhao Jin, Awadhesh Narayan, Chen Luo, Zhigang Chen, Lei Yang, Jin Zou, Xing Wu, Stefano Sanvito, Zhengcai Xia, Liang Li, Zhong Wang, Faxian Xiu,\u00a0Zeeman splitting and dynamical mass generation in Dirac semimetal ZrTe5<\/sub><\/a>\u201c, Nature Communications 7, 12516 (2016).<\/p>\n

10)\u00a0 Junzhi Cao, Sihang Liang, Cheng Zhang, Yanwen Liu, Junwei Huang, Zhao Jin, Zhi-Gang Chen, Zhijun Wang, Qisi Wang, Jun Zhao, Shiyan Li, Xi Dai, Jin Zou, Zhengcai Xia, Liang Li, Faxian Xiu,\u00a0\u201cLandau level splitting in Cd3As2 under high magnetic fields\u201d<\/a>,\u00a0Nature Communications<\/a>\u00a06, 7779 (2015).<\/p>\n<\/div>\n

 <\/p>\n

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