{"id":92241,"date":"2017-07-22T06:30:34","date_gmt":"2017-07-21T22:30:34","guid":{"rendered":"\/\/m.iemloyee.com\/?p=92241"},"modified":"2017-07-19T10:49:28","modified_gmt":"2017-07-19T02:49:28","slug":"nature%e5%ad%90%e5%88%8a-%e4%b8%89%e7%bb%b4%e6%8b%93%e6%89%91%e7%bb%9d%e7%bc%98%e4%bd%93%e7%94%b5%e5%ad%90%e9%80%80%e7%9b%b8%e5%b9%b2%e6%96%b0%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=92241","title":{"rendered":"Nature\u5b50\u520a: \u4e09\u7ef4\u62d3\u6251\u7edd\u7f18\u4f53\u7535\u5b50\u9000\u76f8\u5e72\u65b0\u673a\u5236"},"content":{"rendered":"

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

\u6309\u7167\u5bfc\u7535\u6027\u8d28\u7684\u4e0d\u540c\u6750\u6599\u53ef\u5206\u4e3a\u201c\u91d1\u5c5e\u201d\u548c\u201c\u7edd\u7f18\u4f53\u201d\u4e24\u5927\u7c7b\uff1b\u6839\u636e\u7535\u5b50\u6001\u7684\u62d3\u6251\u6027\u8d28\u7684\u4e0d\u540c\uff0c\u7edd\u7f18\u4f53\u53c8\u5206\u4e3a\u62d3\u6251\u7edd\u7f18\u4f53\u548c\u5176\u4ed6\u666e\u901a\u7edd\u7f18\u4f53\u3002\u62d3\u6251\u7edd\u7f18\u4f53\u7684\u4f53\u7535\u5b50\u6001\u5177\u6709\u80fd\u9699\uff0c\u800c\u5176\u8fb9\u754c\u6216\u8868\u9762\u5b58\u5728\u7531\u5bf9\u79f0\u6027\u4fdd\u62a4\u7684\u65e0\u80fd\u9699\u7684\u91d1\u5c5e\u6001\uff0c\u8fd9\u662f\u5b83\u6709\u522b\u4e8e\u666e\u901a\u7edd\u7f18\u4f53\u7684\u72ec\u7279\u4e4b\u5904\u3002\u4e09\u7ef4\u62d3\u6251\u7edd\u7f18\u4f53\u7684\u5bfc\u7535\u8868\u9762\u6001\u80fd\u591f\u7a33\u5b9a\u5b58\u5728\uff0c\u4e14\u4e0d\u540c\u81ea\u65cb\u7684\u5bfc\u7535\u7535\u5b50\u7684\u8fd0\u52a8\u65b9\u5411\u76f8\u53cd\uff0c\u6240\u4ee5\u8868\u9762\u6001\u7535\u5b50\u53ef\u7528\u6765\u5b9e\u73b0\u65b0\u578b\u7684\u81ea\u65cb\u7535\u5b50\u5b66\u5668\u4ef6\u3002\u7814\u7a76\u56fa\u6001\u7cfb\u7edf\u4e2d\u7684\u7535\u5b50\u9000\u76f8\u5e72\u673a\u5236\u5bf9\u63a2\u7a76\u5176\u57fa\u6001\u672c\u8d28\u4ee5\u53ca\u5229\u7528\u91cf\u5b50\u76f8\u5e72\u8fdb\u884c\u4fe1\u606f\u5904\u7406\u975e\u5e38\u91cd\u8981\u3002\u8fd1\u5e74\u6765\u5bf9\u4e09\u7ef4\u62d3\u6251\u7edd\u7f18\u4f53\u7684\u7814\u7a76\u8868\u660e\uff0c\u4e09\u7ef4\u62d3\u6251\u7edd\u7f18\u4f53\u53ca\u5176\u884d\u751f\u7ed3\u6784\u80fd\u591f\u4ea7\u751f\u53cd\u5e38\u91cf\u5b50\u970d\u5c14\u6548\u5e94\uff0c\u91cf\u5b50\u970d\u5c14\u6548\u5e94\uff0c\u4ee5\u53ca\u5176\u5b83\u8bb8\u591a\u6709\u8da3\u7684\u91cf\u5b50\u8f93\u8fd0\u6027\u8d28\uff0c\u5982\u5f31\u53cd\u5c40\u57df\u5316\u6548\u5e94\uff0cAharonov-Bohm\u6548\u5e94\u548cAharonov-Aronov-Spivak\u6548\u5e94\u7b49\uff0c\u56e0\u6b64\u5f15\u8d77\u4e86\u79d1\u7814\u5c4a\u7684\u5e7f\u6cdb\u5173\u6ce8\u3002<\/p>\n

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

\u8fd1\u65e5\uff0c\u4e2d\u56fd\u79d1\u5b66\u9662\u7269\u7406\u7814\u7a76\u6240\u674e\u6c38\u5e86\u7814\u7a76\u5458\u548c\u6e05\u534e\u5927\u5b66\u4f55\u73c2\u6559\u6388<\/strong> (<\/strong>\u5171\u540c\u901a\u8baf\u4f5c\u8005<\/strong>) <\/strong>\u7b49\u4eba\u5728Nature Communications<\/strong>\u6742\u5fd7\u4e0a\u53d1\u8868\u4e86\u4e00\u7bc7\u9898\u4e3a\u201cEnhanced electron dephasing in three-dimensional topological insulators\u201d <\/strong>\u7684\u6587\u7ae0\u3002\u8be5\u6587\u7ae0\u62a5\u9053\u4e86\u5229\u7528\u53cd\u5f31\u5c40\u57df\u5316\u6548\u5e94\u6d4b\u91cf\u4e0d\u540c\u6805\u6781\u7535\u538b\u548c\u6e29\u5ea6\u4e0b(Bi,Sb)2<\/sub>Te3<\/sub>\u8584\u819c\u7684\u7535\u5b50\u9000\u76f8\u5e72\u901f\u7387\u3002\u7814\u7a76\u7ed3\u679c\u663e\u793a\u8584\u819c\u4f53\u6001\u5bfc\u7535\u65f6\u7535\u5b50\u9000\u76f8\u5e72\u901f\u7387\u968f\u6e29\u5ea6\u7ebf\u6027\u53d8\u5316\uff0c\u7b26\u5408\u4f20\u7edf\u4e8c\u7ef4\u4f53\u7cfb\u4e2d\u7684Nyquist\u9000\u76f8\u5e72\u673a\u5236\u3002\u800c\u5f53\u8584\u819c\u8868\u9762\u8f93\u8fd0\u5360\u4e3b\u5bfc\u65f6\uff0c\u7535\u5b50\u9000\u76f8\u5e72\u901f\u7387\u4e0e\u6e29\u5ea6\u4e4b\u95f4\u5448\u73b0\u53cd\u5e38\u7684\u4e9a\u7ebf\u6027\u76f8\u5173\uff0c\u5373\u03c4\u03a6<\/sub>-1<\/sup>\u00a0\u221dTp<\/sup>\uff0cp<\/em>=0.45-0.6\u3002\u6587\u7ae0\u63d0\u51fa\u4e86\u89e3\u91ca\u8fd9\u79cd\u53cd\u5e38\u7535\u5b50\u9000\u76f8\u5e72\u89c4\u5f8b\u7684\u673a\u5236\uff0c\u5373\u62d3\u6251\u7edd\u7f18\u4f53\u8868\u9762\u6001\u7535\u5b50\u4e0e\u4f53\u5185\u7eb3\u7c73\u5c3a\u5ea6\u7684\u7535\u5b50\u548c\u7a7a\u7a74\u6db2\u56e2\u4e4b\u95f4\u7684\u8026\u5408\u5bfc\u81f4\u4e86\u9000\u76f8\u5e72\u901f\u7387\u7684\u4e9a\u7ebf\u6027\u6e29\u5ea6\u4f9d\u8d56\u5173\u7cfb\u3002\u6587\u7ae0\u7b2c\u4e00\u4f5c\u8005\u4e3a\u4e2d\u56fd\u79d1\u5b66\u9662\u7269\u7406\u7814\u7a76\u6240\u535a\u58eb\u751f\u5ed6\u5251<\/strong>\u3002<\/p>\n

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

\u56fe<\/strong>1. <\/strong>\u62d3\u6251\u7edd\u7f18\u4f53\u5316\u5b66\u52bf\u548c\u8f93\u8fd0\u6027\u8d28\u7684\u53cc\u6805\u8c03\u63a7<\/strong><\/p>\n

\"\"<\/p>\n

(a). \u5177\u6709\u9876\u6805\u548c\u5e95\u6805\u7684\u970d\u5c14\u6761\u5f62\u5668\u4ef6\u793a\u610f\u56fe\u3002<\/p>\n

(b, c). \u7eb5\u5411\u7535\u963b\u7387(b)\u548c\u970d\u5c14\u7cfb\u6570(c)\u968f\u9876\u6805\u7535\u538b(VT<\/sub>)\u548c\u5e95\u6805\u7535\u538b(VB<\/sub>)\u7684\u53d8\u5316\u60c5\u51b5\u3002<\/p>\n

(d). \u4e00\u5b9a\u9876\u6805\u7535\u538b\u4e0b, \u970d\u5c14\u7cfb\u6570\uff08\u4e0a\uff09\u7eb5\u5411\u7535\u963b\u7387\uff08\u4e0b\uff09\u5bf9\u5e95\u6805\u7535\u538b\u7684\u4f9d\u8d56\u5173\u7cfb\u3002<\/p>\n

(e). \u51e0\u7ec4\u9876\u6805\u548c\u5e95\u6805\u7535\u538b\u4e0b\u7684\u970d\u5c14\u7535\u963b\u66f2\u7ebf\u3002<\/p>\n

(f). \u8131\u8026\u5408\u8868\u9762\u6001\u8f93\u8fd0(A)\u548c\u4f53\u6001\u8f93\u8fd0(B)\u6761\u4ef6\u6240\u5bf9\u5e94\u7684\u4e0a\u4e0b\u8868\u9762\u6001\u80fd\u5e26\u7ed3\u6784\u793a\u610f\u56fe\u3002<\/p>\n

\u56fe<\/strong>2. <\/strong>(Bi,Sb)2<\/sub>Te3<\/sub><\/strong>\u8584\u819c\u4e2d\u7684\u53ef\u8c03\u8868\u9762\u6001\u4e0e\u4f53\u6001\u8026\u5408<\/strong><\/p>\n

\"\"<\/p>\n

(a). \u4f4e\u573a\u78c1\u7535\u5bfc\u7387\u53ca\u5176Hikami-Larkin-Nagaoka(HLN)\u7684\u6700\u4f18\u62df\u5408\u3002<\/p>\n

(b). \u4eceHLN\u62df\u5408\u4e2d\u63d0\u53d6\u7684\u56e0\u5b50\u03b1\u548c\u9000\u76f8\u5e72\u573aB\u03a6<\/sub>\u968f\u6805\u6781\u7535\u538b\u7684\u53d8\u5316\u3002<\/p>\n

(c, d).\u56e0\u5b50\u03b1\u8131\u8026\u5408\u8868\u9762\u6001\u8f93\u8fd0\u03b1\u22481\u548c\u4f53\u6001\u4f20\u8f93\u03b1\u22481\/2\u6761\u4ef6\u4e0b\u56e0\u5b50\u03b1\u968f\u6e29\u5ea6\u7684\u53d8\u5316\u3002<\/p>\n

\u56fe<\/strong>3. <\/strong>\u9000\u8026\u5408\u8868\u9762\u6001\u4f20\u8f93\u4e0b\u589e\u5f3a\u7535\u5b50\u9000\u76f8\u5e72<\/strong><\/p>\n

\"\"<\/p>\n

(a). \u53cc\u6805\u8c03\u63a7\u4e0b\u03b1\u22481\u65f6\u9000\u76f8\u5e72\u573aB\u03a6<\/sub>\u7684\u6e29\u5ea6\u4f9d\u8d56\u7279\u6027\u53ca\u5e42\u6307\u6570\u62df\u5408\uff0cB\u03a6<\/sub>\u221dTp<\/sup><\/em>\u00a0,p=0.55\u3002<\/em><\/p>\n

(b). \u5355\u4e00\u6805\u538b\u8c03\u63a7\u4e0b\u4e09\u6b21\u964d\u6e29\u6d4b\u91cf\u5f97\u5230\u7684\u9000\u76f8\u5e72\u573aB\u03a6<\/sub>\u968f\u6e29\u5ea6\u7684\u53d8\u5316\u53ca\u5e42\u6307\u6570\u62df\u5408\uff0c\u62df\u5408\u5f97\u5230\u7684p<\/em>\u6307\u6570\u4e0e\u53cc\u6805\u4e0b\u5f97\u5230\u7684p<\/em>\u6307\u6570\u76f8\u540c\u3002<\/p>\n

(c). \u4e0b\u8868\u9762\u6001\u4f4d\u76f8\u76f8\u5e72\u65f6\u95f4\u03c4\u03a6<\/sub>\u4e0e\u6e29\u5ea6\u95f4\u51fd\u6570\u5173\u7cfb\u3002<\/p>\n

\u56fe<\/strong>4. <\/strong>\u7535\u5b50\u9000\u76f8\u5e72\u901f\u7387\u53ef\u8c03\u4e9a\u7ebf\u6027\u6e29\u5ea6\u4f9d\u8d56<\/strong><\/p>\n

\"\"<\/p>\n

(a). \u4f53\u6001\u5bfc\u7535\u65f6\uff0c\u9000\u76f8\u5e72\u573aB\u03a6<\/sub> (\u4e0e\u9000\u76f8\u5e72\u901f\u7387\u03c4\u03a6<\/sub>-1<\/sup>\u5448\u6b63\u6bd4)\u7684\u6e29\u5ea6\u4f9d\u8d56\u7279\u6027\u53ca\u7ebf\u6027\u62df\u5408\u3002<\/p>\n

(b). \u4e0d\u540c\u6805\u6781\u7535\u538b\u4e0b\u9000\u76f8\u5e72\u573aB\u03a6<\/sub> \u968f\u6e29\u5ea6\u53d8\u5316\uff0c\u968f\u7740\u6805\u6781\u7535\u538b\u589e\u5927\uff0c\u4e09\u7ef4\u62d3\u6251\u7edd\u7f18\u4f53\u7531\u4f53\u6001\u8f93\u8fd0(\u03b1\u22481\/2)\u53d8\u5316\u4e3a\u8868\u9762\u6001\u8f93\u8fd0(\u03b1\u22481)\u3002<\/p>\n

(c). \u4e0e(b)\u76f8\u540c\u6805\u6781\u7535\u538b\u4e0b\u524d\u56e0\u5b50\u03b1\u548c\u6307\u6570p<\/em>\u968f\u6e29\u5ea6\u7684\u53d8\u5316\u3002<\/p>\n

(d). \u5728\u4f53\u6001\u8f83\u7edd\u7f18\u7684\u62d3\u6251\u7edd\u7f18\u4f53\u4e2d\u7535\u52bf\u6da8\u843d\u5bfc\u81f4\u7684\u7535\u5b50\u548c\u7a7a\u7a74\u6db2\u56e2\u3002<\/p>\n

(e). \u7535\u5b50\u5728\u7535\u8377\u6db2\u56e2\u4e4b\u95f4\u7684\u53d8\u7a0b\u8dc3\u8fc1\u4ee5\u53ca\u5728\u8868\u9762\u6001\u4e0e\u8fd9\u4e9b\u5c40\u57df\u4f53\u6001\u4e4b\u95f4\u7684\u6563\u5c04\u8fc7\u7a0b\u3002<\/p>\n

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

\u5229\u7528\u62d3\u6251\u7edd\u7f18\u4f53\u8868\u9762\u6001\u7684\u72ec\u7279\u81ea\u65cb\u6027\u8d28\uff0c\u6709\u671b\u5b9e\u73b0\u80fd\u8017\u66f4\u4f4e\u7684\u65b0\u578b\u4fe1\u606f\u5668\u4ef6\u3002\u6b64\u9879\u5de5\u4f5c\u6df1\u5165\u7814\u7a76\u4e86\u4e09\u7ef4\u62d3\u6251\u7edd\u7f18\u4f53\u4e2d\u7684\u7535\u5b50\u7684\u9000\u76f8\u5e72\u673a\u5236\uff0c\u8fd9\u4e0d\u4ec5\u6709\u52a9\u4e8e\u6df1\u5165\u7406\u89e3\u91cf\u5b50\u8f93\u8fd0\u6027\u8d28\uff0c\u800c\u4e14\u5bf9\u5229\u7528\u6ce2\u7684\u5e72\u6d89\u6027\u8d28\u63a2\u7d22\u65b0\u5947\u51c6\u7c92\u5b50\u548c\u8fdb\u4e00\u6b65\u8fdb\u884c\u91cf\u5b50\u4fe1\u606f\u5904\u7406\u5177\u6709\u91cd\u8981\u610f\u4e49\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1a<\/strong>Enhanced electron dephasing in three-dimensional topological insulators<\/strong><\/a> (Nat. Commun., 2017, DOI: 10.1038\/ncomms16071)<\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u7535\u5b50\u7535\u5de5\u5b66\u672f\u7ec4\u4efb\u4e39\u4e39\u4f9b\u7a3f\uff0c\u6750\u6599\u725b\u6574\u7406\u7f16\u8f91\u3002<\/p>\n

\u6750\u6599\u725b\u7f51\u4e13\u6ce8\u4e8e\u8ddf\u8e2a\u6750\u6599\u9886\u57df\u79d1\u6280\u53ca\u884c\u4e1a\u8fdb\u5c55\uff0c\u5982\u679c\u60a8\u5bf9\u4e8e\u8ddf\u8e2a\u6750\u6599\u9886\u57df\u79d1\u6280\u8fdb\u5c55\uff0c\u89e3\u8bfb\u9ad8\u6c34\u5e73\u6587\u7ae0\u6216\u662f\u8bc4\u8ff0\u884c\u4e1a\u6709\u5174\u8da3\uff0c\u70b9\u6211\u52a0\u5165\u7f16\u8f91\u90e8<\/a>\u3002\u5982\u679c\u4f60\u5bf9\u7535\u5b50\u6750\u6599\u611f\u5174\u8da3\uff0c\u613f\u610f\u4e0e\u7535\u5b50\u7535\u5de5\u9886\u57df\u4eba\u624d\u4ea4\u6d41\uff0c\u8bf7\u52a0\u5165\u6750\u6599\u4eba\u7535\u5b50\u7535\u5de5\u6750\u6599\u5b66\u4e60\u5c0f\u7ec4\uff08QQ\u7fa4\uff1a482842474\uff09\u3002\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

\u6750\u6599\u6d4b\u8bd5\uff0c\u6570\u636e\u5206\u6790\uff0c\u4e0a<\/strong>\u6d4b\u8bd5\u8c37<\/strong><\/a>\uff01<\/strong><\/p>\n

\u7814\u7a76\u56e2\u961f\u5728\u62d3\u6251\u7edd\u7f18\u4f53\u91cf\u5b50\u8f93\u8fd0\u65b9\u9762\u7684\u4e3b\u8981\u5de5\u4f5c\u5982\u4e0b\uff1a<\/strong><\/p>\n

(1). \u00a0J. Liao et al., Observation of Anderson localization in ultrathin films of three-dimensional topological insulators,<\/a> Phys. Rev. Lett. 114<\/strong>, 216601 (2015).\u00a0<\/p>\n

(2). W. M. Yang et al., Proximity effect between a topological insulator and a magnetic insulator with large perpendicular anisotropy<\/a>, Appl. Phys. Lett.\u00a0105<\/strong>, 092411 (2014).<\/p>\n

(3). C. J. Lin et al., Parallel field magnetoresistance of topological insulator thin films<\/a>, Phys. Rev. B 88<\/strong>, 041307 (R) (2013).<\/p>\n

(4) J. Chen et al., Tunable surface conductivity in Bi2<\/sub>Se3<\/sub> revealed with diffusive electron transport<\/a>, Phys. Rev. B 83<\/strong>, 241304(R) (2011) (Editors\u2019 suggestion).<\/p>\n

(5). J. Chen et al., Gate voltage control of chemical potential and weak antilocalization in Bi2<\/sub>Se3<\/sub><\/a>, Phys. Rev. Lett. 105<\/strong>\uff0c176602 (2010).<\/p>\n","protected":false},"excerpt":{"rendered":"

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