{"id":152106,"date":"2018-08-29T06:59:56","date_gmt":"2018-08-28T22:59:56","guid":{"rendered":"http:\/\/www.cailiaoniu.com\/?p=152106"},"modified":"2018-08-28T22:01:48","modified_gmt":"2018-08-28T14:01:48","slug":"%e6%b5%99%e6%b1%9f%e5%a4%a7%e5%ad%a6%e6%96%b0%e5%8a%a0%e5%9d%a1%e5%9b%bd%e7%ab%8b%e5%a4%a7%e5%ad%a6nature%e5%ad%90%e5%88%8a%ef%bc%9a%e4%ba%8c%e7%bb%b4%e9%99%90%e5%9f%9f%e5%86%85%e5%ae%a4%e6%b8%a9","status":"publish","type":"post","link":"http:\/\/www.cailiaoniu.com\/?p=152106","title":{"rendered":"\u6d59\u6c5f\u5927\u5b66&\u65b0\u52a0\u5761\u56fd\u7acb\u5927\u5b66Nature\u5b50\u520a\uff1a\u4e8c\u7ef4\u9650\u57df\u5185\u5ba4\u6e29\u9762\u5916\u94c1\u7535\u548c\u96a7\u9053\u7535\u6d41\u53d8\u7684\u76f4\u63a5\u89c2\u5bdf"},"content":{"rendered":"

\u3010\u524d\u8a00\u3011<\/strong><\/p>\n

\u5728\u51dd\u805a\u6001\u7269\u8d28\u4e2d\uff0c\u6709\u5e8f\u53c2\u6570\uff0c\u5982\u94c1\u78c1\u78c1\u5316\u3001\u8d85\u5bfc\u80fd\u9699\u548c\u94c1\u7535\u6781\u5316\uff0c\u7531\u4e8e\u5c3a\u5bf8\u3001\u8868\u9762\u548c\u754c\u9762\u6548\u5e94\u4ee5\u53ca\u91cf\u5b50\u6ce2\u52a8\uff0c\u901a\u5e38\u5728\u51cf\u5c0f\u7684\u5c3a\u5bf8\u4e0b\u88ab\u6291\u5236\u3002\u6700\u8fd1\uff0c\u7814\u7a76\u4eba\u5458\u89c2\u5bdf\u5230\u5355\u5c42Fe\u819c\u8868\u73b0\u51fa\u957f\u7a0b\u94c1\u78c1\u6709\u5e8f\uff0c\u5e76\u4e14\u5728\u5355\u5c42\u91d1\u5c5e\u819c\u548cFeSe\u819c\u4e2d\u5b58\u5728\u4e8c\u7ef4\u8d85\u5bfc\u6027\uff0c\u8fd9\u5b8c\u5168\u6253\u7834\u4e86\u957f\u7a0b\u6709\u5e8f\u7684\u5c3a\u5bf8\u9650\u5236\u3002\u5728\u94c1\u7535\u4e2d\uff0c\u867d\u7136\u5728\u539f\u5b50\u539a\u7684SnTe\u4e2d\u5b9e\u9a8c\u89c2\u5bdf\u5230\u4e86\u5f3a\u7684\u9762\u5185\u81ea\u53d1\u6781\u5316\uff0c\u4f46\u662f\u7531\u4e8e\u94c1\u7535(FE)\/\u91d1\u5c5e\u754c\u9762\u5904\u6781\u5316\u7535\u8377\u7684\u4e0d\u5b8c\u5168\u5c4f\u853d\u4ee5\u53ca\u754c\u9762\u5e94\u53d8\u3001\u9519\u914d\u4f4d\u9519\u548c\u8868\u9762\u91cd\u5efa\u7684\u5916\u5728\u5f71\u54cd\uff0c\u8ba4\u4e3a\u539f\u59cb\u8584\u819c\u4e2d\u5b58\u5728\u9762\u5916\u94c1\u7535\u7684\u4e34\u754c\u539a\u5ea6\u3002\u7406\u8bba\u4e0a\uff0c\u949b\u9178\u94a1(BTO)\u7684\u4e34\u754c\u539a\u5ea6\u4e3a2.4 nm\uff0c\u800c\u5b9e\u9a8c\u8868\u660eBaTiO3 (BTO)\u7684\u4e34\u754c\u539a\u5ea6\u4e3a1.2 nm\uff0c\u5171\u805a\u7269\u7684\u4e34\u754c\u539a\u5ea6\u4e3a1 nm\u3002\u6700\u8fd1\uff0c\u5728\u901a\u8fc7\u79bb\u5b50\u7814\u78e8\u53d8\u8584\u76841.5 (u.c.)\u7535\u6c60\u539a\u7684PbZr0.2<\/sub>Ti0.8<\/sub>O3<\/sub> (PZT)\u819c\u4e2d\u89c2\u5bdf\u5230\u81ea\u53d1\u6781\u5316\uff0c\u5176\u4f53\u79ef\u503c\u4e3a17 %\u3002\u7136\u800c\uff0c\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u76f4\u63a5\u751f\u957f\u539f\u5b50\u539a\u5ea6\u7684FE\u819c\u5728\u5ba4\u6e29\u4e0b\u5177\u6709\u5782\u76f4\u4e8e\u819c\u8868\u9762\u7684\u6781\u5316\u4ecd\u7136\u662f\u4e00\u4e2a\u6311\u6218\u3002<\/p>\n

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

\u8fd1\u65e5\uff0c\u6765\u81ea\u6d59\u6c5f\u5927\u5b66\u7684\u7530\u9e64\u7814\u7a76\u5458\u548c\u65b0\u52a0\u5761\u56fd\u7acb\u5927\u5b66\u7684<\/strong>Chen Jingsheng<\/strong>\u526f\u6559\u6388\uff08\u901a\u8baf\u4f5c\u8005\uff09<\/strong>\u8054\u5408\u5728Nature Communications\u4e0a\u53d1\u8868\u6587\u7ae0\uff0c\u9898\u4e3a\uff1aDirect observation of room-temperature out-of-plane ferroelectricity and tunneling electroresistance at the two-dimensional limit\u3002\u56db\u65b9\u76f8BiFeO3<\/sub>\u8d85\u8584\u8584\u819c\u663e\u793a\u4e86\u5ba4\u6e29\u4e0b\u4e8c\u7ef4\u6781\u9650\u7684\u94c1\u7535\u987a\u5e8f\u3002\u4f7f\u7528\u7403\u5dee\u6821\u6b63\u7684\u626b\u63cf\u900f\u5c04\u7535\u5b50\u663e\u5fae\u955c\uff0c\u4f5c\u8005\u76f4\u63a5\u89c2\u5bdf\u5230\u4e86\u4e00\u4e2a\u5355\u4f4d\u6676\u80de\u539a\u7684BiFeO3<\/sub>\u8584\u819c\u4e2d\u5f3a\u7684\u9762\u5916\u81ea\u53d1\u6781\u5316\u3002\u9ad8\u5206\u8fa8\u7387\u538b\u7535\u54cd\u5e94\u529b\u663e\u5fae\u955c\u6d4b\u91cf\u8868\u660e\uff0c\u6781\u5316\u662f\u7a33\u5b9a\u7684\u548c\u53ef\u5207\u6362\u7684\uff0c\u800c\u5728BiFeO3<\/sub>\u8584\u819c\u4e2d\u5b9e\u73b0\u4e86\u9ad8\u8fbe370 %\u7684\u96a7\u9053\u7535\u6d41\u53d8\u6548\u5e94\u3002\u57fa\u4e8e\u7b2c\u4e00\u539f\u7406\u8ba1\u7b97\u548c\u5f00\u5c14\u6587\u63a2\u9488\u529b\u663e\u5fae\u955c\u6d4b\u91cf\uff0c\u4f5c\u8005\u89e3\u91ca\u4e86\u901a\u8fc7\u6c27\u5316\u7269\u7535\u6781\u4e2d\u7684\u79bb\u5b50\u4f4d\u79fb\u548c\u8868\u9762\u7535\u8377\u6765\u7a33\u5b9a\u6781\u5316\u7684\u673a\u7406\u3002\u4f5c\u8005\u7684\u7ed3\u679c\u8868\u660e\uff0cBiFeO3<\/sub>\u8584\u819c\u4e2d\u7684\u94c1\u7535\u4e34\u754c\u539a\u5ea6\u5b9e\u9645\u4e0a\u662f\u4e0d\u5b58\u5728\u7684\uff0c\u8fd9\u4f7f\u5f97\u5b83\u6210\u4e3a\u9ad8\u5bc6\u5ea6\u975e\u6613\u5931\u6027\u5b58\u50a8\u5668\u7684\u4e00\u4e2a\u6709\u5e0c\u671b\u7684\u5019\u9009\u8005\u3002<\/p>\n

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

\u56fe\u4e00. 2-\u548c3-u.c. BFO\u4e2d\u6781\u5316\u7684\u539f\u5b50\u5c3a\u5ea6\u89c2\u5bdf<\/p>\n

\"\"<\/p>\n

a 2-u.c. BFO\u7684\u539f\u5b50\u5206\u8fa8HAADF-STEM\u56fe\uff1b<\/p>\n

b a\u4e2d\u767d\u8272\u865a\u7ebf\u77e9\u5f62\u6807\u8bb0\u7684\u533a\u57df\u7684\u653e\u5927\u56fe\u50cf\u548cB\u4f4d\u70b9\u539f\u5b50\u4f4d\u79fb\u77e2\u91cf\u5730\u56fe\u7684\u53e0\u52a0\uff1b<\/p>\n

c\u94c1\u7535BFO\u7684\u6676\u80de\u793a\u610f\u56fe<\/p>\n

d 3 -u.c. BFO\u819c\u7684HAADF \u2013 STEM\u56fe\uff1b<\/p>\n

e .\u4eced\u4e2d\u767d\u8272\u865a\u7ebf\u77e9\u5f62\u6807\u8bb0\u7684\u533a\u57df\u53e0\u52a0\u653e\u5927\u7684\u56fe\u50cf\u548cB\u7ad9\u70b9\u539f\u5b50\u4f4d\u79fb\u77e2\u91cf\u5730\u56fe<\/p>\n

f-j\u5206\u522b\u4e3ae\u7684Bi\u3001Fe\u3001Sr\u3001Ru\u548c\u91cd\u53e0\u7684EDX\u5143\u7d20\u56fe\uff1b<\/p>\n

\u56fe\u4e8c. \u901a\u8fc7\u5b9e\u9a8c\u548c\u8ba1\u7b97\u6570\u636e\u5b9a\u91cf\u5206\u6790BFO\u4e2d\u7684\u504f\u5fc3\u4f4d\u79fb\u548c\u6676\u683c\u53c2\u6570<\/p>\n

\"\"<\/p>\n

a \u6cbf\u7740\u56fe1d\u4e2d\u7684\u7d2b\u8272\u548c\u7ea2\u8272\u7ebf\uff0c\u7a7f\u8fc7SRO\/BFO\u5f02\u8d28\u754c\u9762\u7684A\u4f4d\u70b9(\u9876\u90e8\uff0c\u7d2b\u8272)\u548cB\u4f4d\u70b9(\u5e95\u90e8\uff0c\u7ea2\u8272)\u9633\u79bb\u5b50\u7684STEM\u5f3a\u5ea6\u5206\u5e03\u3002<\/p>\n

b\u5728\u5b9e\u9a8c\u548c\u8ba1\u7b97\u4e2d\uff0cSRO\/BFO\u754c\u9762\u9644\u8fd1B\u4f4d\u9633\u79bb\u5b50\u7684\u5e73\u5747\u504f\u5fc3\u4f4d\u79fb\uff1b<\/p>\n

c \u4eceA\u2013A (Bi\u2013Bi, Sr\u2013Sr)\u7684\u8ddd\u79bb\u548cB\u2013B (Fe\u2013Fe, Ru\u2013Ru)\u7684\u8ddd\u79bb\u63a8\u5bfc\u51fac\u548ca\u8f74\u6676\u683c\u53c2\u6570\u3002<\/p>\n

\u56fe\u4e09 2\u548c3-u.c.BFO\u8584\u819c\u4e2d\u7684\u94c1\u7535\u5f00\u5173\u548c\u7a33\u5b9a\u6027<\/p>\n

\"\"<\/p>\n

a, b 2-u.c.\u5e73\u9762\u5916SS-PFM\u632f\u5e45(\u534a\u586b\u5145\u7eff\u8272\u6b63\u65b9\u5f62)\u548c\u76f8\u4f4d(\u586b\u5145\u84dd\u8272\u5706\u5708)\u66f2\u7ebf\uff1b<\/p>\n

c\uff0cd 3-u.c.\u5e73\u9762\u5916SS – PFM\u632f\u5e45(\u534a\u586b\u5145\u7eff\u8272\u6b63\u65b9\u5f62)\u548c\u76f8\u4f4d(\u586b\u5145\u84dd\u8272\u5706\u5708)\u66f2\u7ebf\uff1b<\/p>\n

e, f\u00a0 2-u.c.\u7684\u5e73\u9762\u5916PFM\u632f\u5e45\u548c\u76f8\u4f4d\u56fe\u50cf;<\/p>\n

g\uff0ch 2-u.c.\u5e73\u9762\u5916PFM\u632f\u5e45\u548c\u76f8\u4f4d\u56fe\u50cf\uff1b<\/p>\n

\u56fe\u56db. 1-u.c. BFO\u4e2d\u7684\u94c1\u7535\u96a7\u9053\u7ed3\u548c\u96a7\u9053\u673a\u5236<\/p>\n

\"\"<\/p>\n

a\u5904\u4e8e\u5173\u95ed\u548c\u5f00\u542f\u72b6\u6001\u7684\u9759\u7535\u52bf(\u03d5)\u5206\u5e03\u793a\u610f\u56fe\uff1b<\/p>\n

b\u5728\u4e24\u4e2a\u76f8\u53cd\u6781\u5316\u65b9\u5411(\u84dd\u8272\u3001\u5411\u4e0b\u3001\u6a59\u8272\u3001\u5411\u4e0a)\u7684\u5c0f\u7535\u538b\u8303\u56f4\u5185\u7684J – V\u66f2\u7ebf\u3002<\/p>\n

\u56fe5. SRO\/BFO\u56db\u65b9\u7ed3\u6784\u7684\u786e\u8ba4<\/p>\n

\"\"<\/p>\n

a\u5728\u56db\u65b9SRO( 001 ) STO\u4e0a\u7684\u56db\u65b9BFO\u7684\u793a\u610f\u56fe\uff1b<\/p>\n

b\u2013d \u5206\u522b\u56f4\u7ed5{204} (b)\u3001{103} (c)\u548c{113} (d)\u7684b- d\u9762\u5185\u4e0d\u5bf9\u79f0\u4e92\u60e0\u7a7a\u95f4\u6620\u5c04(RSM)\uff1b<\/p>\n

\u3010\u603b\u7ed3\u3011<\/strong><\/p>\n

\u4f5c\u8005\u89c2\u5bdf\u5230\u4e86\u5e73\u9762\u5916\u5ba4\u6e29\u94c1\u7535\u6027\u53ca\u5176\u5728\u56db\u65b9\u6676\u7cfbBiFeO3<\/sub>\u8584\u819c\u4e2d\u7684\u53ef\u8f6c\u6362\u6027\uff0c\u76f4\u5230\u4e8c\u7ef4\u6781\u9650\u3002\u5b9e\u9a8c\u89c2\u5bdf\u548c\u7406\u8bba\u8ba1\u7b97\u8868\u660e\uff0c\u6c27\u5316\u7269\u7535\u6781\u7684\u6676\u4f53\u7ed3\u6784\u3001\u56db\u65b9\u6027\u3001\u754c\u9762\u5316\u5b66\u73af\u5883\u548c\u79bb\u5b50\u6781\u5316\u6709\u52a9\u4e8e\u964d\u4f4e\u6216\u6d88\u9664\u94c1\u7535\u7684\u4e34\u754c\u539a\u5ea6\u3002\u6b64\u5916\uff0c\u5728FTJ\u4e2d\uff0c\u4f7f\u75281-u.c.\u56db\u65b9BiFeO3<\/sub>\u96a7\u9053\u52bf\u5792\uff0cTER\u6bd4\u7387\u8fbe\u5230\u4e86\u7ea6370 %\uff0c\u8fd9\u5bf9\u4e8e\u9ad8\u5bc6\u5ea6\u6570\u636e\u5b58\u50a8\u663e\u793a\u51fa\u5de8\u5927\u7684\u524d\u666f\u3002\u4f5c\u8005\u7684\u53d1\u73b0\u5c06\u4e3a\u94c1\u7535\u57fa\u5668\u4ef6\u7684\u5c0f\u578b\u5316\u5f00\u8f9f\u53ef\u80fd\u6027\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1aDirect observation of room-temperature out-of-plane ferroelectricity and tunneling electroresistance at the two-dimensional limit<\/a>, (Nature Communications, 2018, DOI: DOI: 10.1038\/s41467-018-05662-y)\u3002<\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u7535\u5b50\u7535\u5de5\u5b66\u672f\u7ec4Z. Chen\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\u7bb1\uff1atougao@cailiaoren.com\u3002<\/p>\n

\u6295\u7a3f\u4ee5\u53ca\u5185\u5bb9\u5408\u4f5c\u53ef\u52a0\u7f16\u8f91\u5fae\u4fe1\uff1acailiaokefu<\/p>\n","protected":false},"excerpt":{"rendered":"

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