{"id":168154,"date":"2019-02-28T06:44:27","date_gmt":"2019-02-27T22:44:27","guid":{"rendered":"http:\/\/www.cailiaoniu.com\/?p=168154"},"modified":"2019-02-27T17:48:30","modified_gmt":"2019-02-27T09:48:30","slug":"%e3%80%90%e9%80%9a%e8%ae%af%e4%bd%9c%e8%80%85%e4%b8%ba%e5%9b%bd%e5%a4%96%e6%9c%aa%e6%a0%a1%e7%a8%bf%e3%80%91nat-commun-%ef%bc%9a%e7%94%b5%e5%ad%90%e6%8e%ba%e6%9d%82%e9%92%9b%e9%85%b8%e9%94%b6","status":"publish","type":"post","link":"http:\/\/www.cailiaoniu.com\/?p=168154","title":{"rendered":"Nat. Commun.\uff1a\u7535\u5b50\u63ba\u6742\u949b\u9178\u9536\u5c06\u8d85\u5bfc\u6027\u63d0\u9ad8\u81f3\u975e\u78c1\u91cf\u5b50\u4e34\u754c\u70b9"},"content":{"rendered":"

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

\u56de\u987e\u51dd\u805a\u6001\u7269\u7406\u7684\u7814\u7a76\u53d1\u5c55\u53f2\uff0cSrTiO3<\/sub>\u662f\u7814\u7a76\u6700\u4e3a\u5e7f\u6cdb\u7684\u8fc7\u6e21\u65cf\u91d1\u5c5e\u6c27\u5316\u7269\u4e4b\u4e00\u3002\u5b83\u662f\u4e00\u79cd\u7b80\u5355\u7edd\u7f18\u4f53\uff0cTi\u76843d<\/em>\u80fd\u5e26\u548cO\u76842p<\/em>\u80fd\u5e26\u4e4b\u95f4\u5b58\u5728\u7ea63.3eV\u7684\u5e26\u9699\uff0c\u5177\u6709\u591a\u79cd\u65b0\u5947\u7684\u6027\u8d28\uff0c\u56e0\u6b64SrTiO3<\/sub>\u4ecd\u662f\u7814\u7a76\u7684\u70ed\u70b9\u3002\u5728\u5927\u7ea6105K\u5904\uff0cTiO6<\/sub>\u516b\u9762\u4f53\u4f1a\u6cbf[001]\u8f74\u53d1\u751f\u4ea4\u9519\u5f0f\u7684\u65cb\u8f6c\uff0c\u4f7fSrTiO3<\/sub>\u53d1\u751f\u53cd\u94c1\u7578\u53d8(antiferrodistortive phase transition)\u3002\u5f88\u591a\u7814\u7a76\u8ba4\u4e3a\u8fd9\u4e00\u53cd\u94c1\u7578\u53d8\u5bf9\u94c1\u7535\u76f8\u53d8\u6709\u6291\u5236\u4f5c\u7528\uff0c\u901a\u8fc7\u7b2c\u4e00\u6027\u539f\u7406\u8ba1\u7b97\u66f4\u9ad8\u6e29\u5ea6\u4e0b\u7684\u60c5\u5f62\uff0c\u4e5f\u652f\u6301\u8fd9\u4e00\u7ed3\u679c\u3002\u7136\u800c\uff0c\u5728\u6781\u4f4e\u6e29\u5ea6\u4e0bSrTiO3<\/sub>\u7684\u94c1\u7535\u6027\u88ab\u6291\u5236\u7684\u539f\u56e0\u4ecd\u4e0d\u5f97\u800c\u77e5\u3002<\/p>\n

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

\u76ee\u524d\uff0c\u5927\u591a\u6570\u6709\u5173\u91cf\u5b50\u4e34\u754c\u70b9\uff08QCP\uff09\u7684\u7814\u7a76\u90fd\u5173\u6ce8\u7684\u662f\u78c1\u6027\u91cf\u5b50\u4e34\u754c\u70b9\u3002\u8fd1\u65e5\uff0c\u65e5\u672c\u4ea7\u4e1a\u6280\u672f\u7efc\u5408\u7814\u7a76\u6240<\/strong>\u7684Yasuhide Tomioka<\/strong>\u535a\u58eb<\/strong>\u548cIsao H. Inoue<\/strong>\u7814\u7a76\u5458\uff08\u5171\u540c\u901a\u8baf\u4f5c\u8005\uff09<\/strong>\u5728Nature Communications<\/strong>\u4e0a\u53d1\u8868\u4e86\u9898\u4e3a\u201cEnhanced superconductivity close to a nonmagnetic quantum critical point in electron-doped strontium titanate<\/strong>\u201d\u7684\u6587\u7ae0\uff0c\u62a5\u9053\u4e86\u5173\u4e8e\u975e\u78c1\u91cf\u5b50\u4e34\u754c\u70b9\u7684\u76f8\u5173\u7814\u7a76\u6210\u679c\u3002\u5728\u6b64\u5de5\u4f5c\u4e2d\uff0c\u4f5c\u8005\u5236\u5907\u4e86\u4f4e\u6e29\u4e0b\u65e0\u5c40\u57df\u5316\u7684Sr1-xLaxTi(16<\/sup>O1-z18<\/sup>Oz)3\u5355\u6676\uff0c\u4ece\u800c\u7cfb\u7edf\u5316\u5730\u7814\u7a76\u7528La\u53d6\u4ee3Sr\u800c\u975e\u5f15\u5165\u6c27\u7a7a\u4f4d\u7684\u60c5\u5f62\u3002\u57fa\u4e8e\u7406\u8bba\u6a21\u578b\u7684\u6570\u636e\u5206\u6790\u53ef\u9884\u6d4b3 \u00d7 1018<\/sup> cm\u22123<\/sup>\u5de6\u53f3\u7684\u94c1\u7535\u6027\u91cf\u5b50\u4e34\u754c\u70b9\u7684\u5f62\u8c8c\u3002\u8be5\u5de5\u4f5c\u53d6\u5f97\u7684\u6210\u679c\u4e3a\u7814\u7a76\u94c1\u7535\u6027\u91cf\u5b50\u70b9\u65b0\u9896\u7684\u7269\u7406\u884c\u4e3a\u63d0\u4f9b\u4e86\u65b0\u7684\u89c6\u89d2\u3002<\/p>\n

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

\u56fe1\uff1aSr1-x<\/sub>Lax<\/sub>TiO3<\/sub>\u5355\u6676\u7684\u7535\u963b\u7387\u548c\u8d85\u5bfc\u7387\u3002<\/p>\n

\"\"(a)Sr1-x<\/sub>Lax<\/sub>TiO3<\/sub>\u5355\u6676\u7684\u7535\u963b\u7387\u548c\u6e29\u5ea6T\u7684\u4f9d\u8d56\u5173\u7cfb\uff0cx\u662f\u539f\u6750\u6599\u4e2dLa\u53d6\u4ee3Sr\u7684\u53d6\u4ee3\u91cf\uff1b<\/p>\n

(b,c) Sr1-x<\/sub>Lax<\/sub>TiO3<\/sub>\u5355\u6676\u7684\u7535\u963b\u7387\u548c\u6e29\u5ea6\u7684\u5e73\u65b9\u7684\u5173\u7cfb\uff1b<\/p>\n

(d) \u75283<\/sup>He\/4<\/sup>He\u7a00\u91ca\u81f4\u51b7\u4f4e\u6e29\u7cfb\u7edf\u6d4b\u91cf\u4f4e\u4e8e1K\u4e0b\uff0c\u7535\u963b\u7387\u4e0e\u6e29\u5ea6\u7684\u5173\u7cfb\u66f2\u7ebf\uff0c\u4f7f\u7528\u7684\u662f\u548c(a)\u56fe\u76f8\u540c\u7684\u6837\u54c1\u3002<\/p>\n

\u56fe2\uff1aSr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub>\u5355\u6676\u7684\u7535\u963b\u7387\u548c\u8d85\u5bfc\u7387\u3002<\/p>\n

\"\"<\/p>\n

(a)18<\/sup>O\u4ea4\u6362\u7684Sr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub>\u548cSr1\u2212x<\/sub>Lax<\/sub>TiO3<\/sub>\u6bd4\u8f83\uff0c\u7535\u963b\u7387\u548c\u6e29\u5ea6\u7684\u4f9d\u8d56\u5173\u7cfb\uff1b<\/p>\n

(b)\u7535\u963b\u7387\u548c\u6e29\u5ea6\u5e73\u65b9\u7684\u51fd\u6570\u5173\u7cfb\u66f2\u7ebf\uff0c\u865a\u7ebf\u8868\u793a\u62df\u5408\u5b9e\u9a8c\u6570\u636e\u7684\u03c1<\/em>~AT<\/em>2<\/sup>\u5173\u7cfb\uff1b<\/p>\n

(c)\u56fe(a)\u4e2d\u6240\u6709Sr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub>\u6837\u54c1\uff0cA<\/em>\u53d6\u5bf9\u6570\u540e\u7684\u503c\u548c\u8f7d\u6d41\u5b50\u5bc6\u5ea6n\u7684\u51fd\u6570\u5173\u7cfb\u66f2\u7ebf\uff1b<\/p>\n

(d-f) \u75283<\/sup>He\/4<\/sup>He\u7a00\u91ca\u81f4\u51b7\u4f4e\u6e29\u7cfb\u7edf\u6d4b\u91cf\uff0c\u4f4e\u4e8e1K\u4e0b\u5269\u4f59\u7535\u963b\u7387\u03c1<\/em>0<\/sub>\u548c\u8d85\u5bfc\u8f6c\u53d8\u6e29\u5ea6T<\/em>c<\/sub>\u7684\u51fd\u6570\u5173\u7cfb\u66f2\u7ebf\u3002<\/p>\n

\u56fe3\uff1aLa\u53d6\u4ee3\u548c18<\/sup>O\u4ea4\u6362\u7684\u8d85\u5bfc\u7a79\u9876\u7684\u6f14\u5316\u3002<\/p>\n

\"\"(a)\u56fe1(a)\u548c\u56fe2(a)\u4e2d\u6240\u793a\u7684Sr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub>\u5355\u6676\u6837\u54c1\u7684T<\/em>c<\/sub>\u548cn<\/em>\u7684\u5173\u7cfb\u66f2\u7ebf\uff1b<\/p>\n

(b)\u57fa\u4e8e\u53c2\u8003\u6587\u732e[18]\u7684\u7406\u8bba\u6a21\u578b\u8ba1\u7b97\u5f97\u5230\u7684\u66f2\u7ebf\uff0c\u53ef\u4ee5\u548c(a)\u4e2d\u90e8\u5206\u7684\u5b9e\u9a8c\u6570\u636e\u76f8\u6bd4\u8f83\uff1b<\/p>\n

(c)\u4eceSr1\u2212x<\/sub>Lax<\/sub>TiO3<\/sub>\uff08\u7ea2\u8272\u65b9\u5757\uff09\u548cSr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub>\uff08\u84dd\u8272\u65b9\u5757\uff09\u7684\u5b9e\u9a8c\u6d4b\u5f97T<\/em>c<\/sub>\u503c\u63a8\u5bfc\uff0c\u5f97\u51fa\u96a7\u7a7f\u80fd\u91cf\u0413<\/em>\u548c\u8d39\u7c73\u6e29\u5ea6T<\/em>F<\/sub>\u7684\u5173\u7cfb\uff1b<\/p>\n

(d)\u56fe(c)\u4e2d\u96a7\u7a7f\u80fd\u91cf\u0413<\/em>\u7a7f\u8fc7\u0413<\/em>=1\u7684\u653e\u5927\u56fe\u3002<\/p>\n

\u56fe4\uff1aLa\u53d6\u4ee3\u548c18<\/sup>O\u4ea4\u6362\u7684\u793a\u610f\u56fe\u3002<\/p>\n

\"\"(a)\u03b1) SrTi(16<\/sup>O1-z<\/sub>18<\/sup>Oz<\/sub>)3-\u03b4<\/sub> and \u03b2) Sr1-x<\/sub>Cax<\/sub>TiO3-\u03b4<\/sub>\u7684\u8d85\u5bfc\u8f6c\u53d8\u6e29\u5ea6\u548c\u8f7d\u6d41\u5b50\u5bc6\u5ea6\u7684\u5173\u7cfb\uff1b<\/p>\n

(b)Sr1\u2212x<\/sub>Lax<\/sub>TiO3<\/sub>\u7684\u8d85\u5bfc\u8f6c\u53d8\u6e29\u5ea6\u548c\u8f7d\u6d41\u5b50\u5bc6\u5ea6\u7684\u5173\u7cfb\uff1b<\/p>\n

(c)\u7684Sr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub>\u7684\u8d85\u5bfc\u8f6c\u53d8\u6e29\u5ea6\u548c\u8f7d\u6d41\u5b50\u5bc6\u5ea6\u7684\u5173\u7cfb\u3002<\/p>\n

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

\u4f5c\u8005\u5236\u5907\u5f97\u5230\u9ad8\u8d28\u91cf\u7684Sr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub>\u5355\u6676\uff0c\u5728\u4f4e\u63ba\u6742\u533a\u57df\u5185\u8fdb\u884c\u6c27\u540c\u4f4d\u7d20\u4ea4\u6362\u3002SrTiO3<\/sub>\u4e2d\u8fdb\u884cLa\u5143\u7d20\u53d6\u4ee3\u662f\u5f15\u5165\u8f7d\u6d41\u5b50\u7684\u4e00\u4e2a\u5f88\u7406\u60f3\u7684\u65b9\u6cd5\uff0c\u6b64\u7bc7\u5de5\u4f5c\u4e2d\u7684\u6837\u54c1\u5728\u4f4e\u6e29\u4e0b\u5e76\u672a\u663e\u793a\u5c40\u57df\u5316\u7684\u8d8b\u52bf\u3002\u8f7d\u6d41\u5b50\u7684\u6d53\u5ea6\u5bf9\u4e8eUmklapp\u6563\u5c04\u6765\u8bf4\u8fc7\u5c0f\uff0c\u7136\u800c\uff0c\u4f5c\u8005\u53ef\u4ee5\u89c2\u5bdf\u5230\u03c1<\/em>~AT<\/em>2<\/sup>\u884c\u4e3a\uff0c\u5e76\u4e14\u7cfb\u6570A<\/em>\u53cd\u6620\u4e86\u8d39\u7c73\u8868\u9762\u7684\u62d3\u6251\u5b66\u53d8\u5316\uff0c\u8868\u660eSr1\u2212x<\/sub>Lax<\/sub>TiO3<\/sub>\u4f53\u7cfb\u65e0\u6cd5\u901a\u8fc7\u4f20\u7edf\u7684\u8d39\u7c73\u6db2\u4f53\u7406\u8bba\u6765\u7406\u89e3\u3002\u8d85\u5bfc\u8f6c\u53d8\u6e29\u5ea6T<\/em>c<\/sub>\u8868\u73b0\u51fa\u7c7b\u4f3c\u4e8eSrTiO3\u2212\u03b4<\/sub>\u7684\u5706\u9876\u72b6\uff0c\u5bf9\u4e8eSr1\u2212x<\/sub>Lax<\/sub>Ti(16<\/sup>O1\u2212z<\/sub>18<\/sup>Oz<\/sub>)3<\/sub> (x ~ 0.0035\uff0c z ~ 0.6)\u6765\u8bf4\uff0cT<\/em>c<\/sub>\u7684\u503c\u4e5f\u5f97\u5230\u4e86\u660e\u663e\u7684\u63d0\u9ad8\u3002\u8be5\u5de5\u4f5c\u5bf9\u9690\u542b\u7684\u94c1\u7535\u91cf\u5b50\u4e34\u754c\u70b9\u6a21\u578b\u7ed9\u51fa\u4e86\u5408\u7406\u7684\u8bc1\u660e\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1aEnhanced superconductivity close to a non-magnetic quantum critical point in electron-doped strontium titanate<\/a>\uff08Nat. Commun.\uff0cDOI\uff1a10.1038\/s41467-019-08693-1\uff09<\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u91d1\u5c5e\u6750\u6599\u7ec4Isobel\u4f9b\u7a3f\uff0c\u6750\u6599\u725b\u6574\u7406\u7f16\u8f91\u3002<\/p>\n

\u6b22\u8fce\u5927\u5bb6\u5230\u6750\u6599\u4eba\u5ba3\u4f20\u79d1\u6280\u6210\u679c\u5e76\u5bf9\u6587\u732e\u8fdb\u884c\u6df1\u5165\u89e3\u8bfb\uff0c\u6295\u7a3f\u90ae\u7bb1tougao@cailiaoren.com\u3002<\/p>\n

\u6295\u7a3f\u4ee5\u53ca\u5185\u5bb9\u5408\u4f5c\u53ef\u52a0\u7f16\u8f91\u5fae\u4fe1\uff1acailiaokefu<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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