{"id":167778,"date":"2019-02-27T06:33:15","date_gmt":"2019-02-26T22:33:15","guid":{"rendered":"\/\/m.iemloyee.com\/?p=167778"},"modified":"2019-02-26T14:52:12","modified_gmt":"2019-02-26T06:52:12","slug":"%e3%80%90%e5%9b%bd%e5%a4%96%e9%80%9a%e8%ae%af%e4%bd%9c%e8%80%85%e3%80%91%e4%b8%9c%e4%ba%ac%e5%a4%a7%e5%ad%a6%e4%b8%9c%e4%ba%ac%e5%b7%a5%e4%b8%9a%e5%a4%a7%e5%ad%a6nature%ef%bc%9a%e5%bc%b1%e6%8b%93","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=167778","title":{"rendered":"\u4e1c\u4eac\u5927\u5b66&\u4e1c\u4eac\u5de5\u4e1a\u5927\u5b66Nature\uff1a\u5f31\u62d3\u6251\u7edd\u7f18\u6001\u5728\u5b9e\u9a8c\u4e2d\u9996\u6b21\u88ab\u9a8c\u8bc1"},"content":{"rendered":"

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

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

\u8fd1\u65e5\uff0c\u4e1c\u4eac\u5927\u5b66Takeshi Kondo\u548c\u4e1c\u4eac\u5de5\u4e1a\u5927\u5b66T. Sasagawa\u56e2\u961f\uff08\u5171\u540c\u901a\u8baf\u4f5c\u8005\uff09<\/b><\/strong>\u5408\u4f5c\uff0c\u4ece\u5b9e\u9a8c\u4e0a\u8bc1\u660e\u4e86\u7898\u5316\u94cb\uff08\u03b2-Bi4<\/sub>I4<\/sub>\uff09\u4e2dWTI\u6001\u7684\u5b58\u5728\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u79cd\u6676\u4f53\u901a\u8fc7\u8303\u5fb7\u534e\u529b\u5806\u53e0\uff0c\u5177\u6709\u660e\u663e\u7684\u81ea\u7136\u5288\u88c2\u7684\u4e0a\u7aef\u9762\u548c\u4fa7\u7aef\u9762\uff0c\u8fd9\u5bf9\u5b9e\u9a8c\u4e0a\u5b9e\u73b0WTI\u6001\u5341\u5206\u6709\u5229\u3002\u4f5c\u4e3aWTI\u6001\u7684\u4e00\u4e2a\u786e\u5b9a\u6807\u5fd7\uff0c\u5728\u4fa7\u7aef\u9762\uff08100\uff09\u53d1\u73b0\u51c6\u4e00\u7ef4\u72c4\u62c9\u514b\u62d3\u6251\u8868\u9762\u6001\uff0c\u800c\u5728\u4e0a\u7aef\u9762\uff08001\uff09\u9762\u6ca1\u6709\u53d1\u73b0\u62d3\u6251\u8868\u9762\u6001\u3002\u6b64\u5916\uff0c\u8fdb\u4e00\u6b65\u53d1\u73b0\u5728\u63a5\u8fd1\u5ba4\u6e29\u4e0b\uff0c\u4ece\u03b2\u76f8\u5230\u03b1\u76f8\u7684\u6676\u4f53\u8f6c\u53d8\u9a71\u52a8\u4e86\u4ece\u975e\u5e73\u51e1\u7684WTI\u5230\u666e\u901a\u7edd\u7f18\u4f53\u7684\u62d3\u6251\u76f8\u53d8\u3002\u5f31\u62d3\u6251\u76f8\u53ef\u4ee5\u88ab\u770b\u4f5c\u662f\u4e09\u7ef4\u5806\u79ef\u65b9\u5411\u4e0a\u7684\u91cf\u5b50\u81ea\u65cb\u970d\u5c14\uff08QSH\uff09\u7edd\u7f18\u4f53\uff0c\u5c06\u4e3a\u9ad8\u5ea6\u5b9a\u5411\u7684\u548c\u5bc6\u96c6\u7684\u81ea\u65cb\u7535\u6d41\u6280\u672f\u5960\u5b9a\u57fa\u7840\u3002\u76f8\u5173\u7814\u7a76\u6210\u679c\u4ee5\u201cA weak topological insulator state in quasi-one-dimensional bismuth iodide<\/b><\/strong>\u201d\u4e3a\u9898\u53d1\u8868\u5728Nature<\/b><\/strong>\u4e0a\u3002<\/p>\n

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

\u56fe<\/b><\/strong>\u4e00<\/b><\/strong>\u3001<\/b>\u03b1-Bi4<\/sub>I4<\/sub>\u548c\u03b2-Bi4<\/sub>I4<\/sub>\u7684\u6676\u4f53\u7ed3\u6784\u3001\u4f20\u9012\u548c\u80fd\u5e26\u62d3\u6251\u8ba1\u7b97\"\"<\/b><\/strong><\/p>\n

\uff08a\uff0cb\uff09\u4ece\u6cbfb\u8f74\u7684\u94fe\u65b9\u5411\u770b\u03b1\u76f8\uff08a\uff09\u548c\u03b2\u76f8\uff08b\uff09\u7684\u6676\u4f53\u7ed3\u6784\uff1b<\/p>\n

\uff08c\uff0cd\uff09\u6676\u4f53\u7535\u963b\u7387\u6cbf\u94fe\u65b9\u5411\uff08\u03c1b<\/sub>\uff09\u968f\u6e29\u5ea6\u7684\u53d8\u5316\u5173\u7cfb\uff0c\u5728\uff08d\uff09\u4e2d\uff0c\u6676\u4f53\u6e29\u5ea6\u4ee53K\/ min\u7684\u901f\u7387\u7f13\u6162\u53d8\u5316\uff0c\u89c2\u5bdf\u5230\u4e86\u6ede\u540e\u73b0\u8c61\uff0c\u63ed\u793a\u4e86\u03b1-Bi4<\/sub>I4<\/sub>\u548c\u03b2-Bi4<\/sub>I4<\/sub>\u4e4b\u95f4\u7684\u76f8\u53d8\uff1b<\/p>\n

\uff08e\uff09 \u5c55\u793aBrillouin\u533a\u57df\u7684\u03b2\u76f8\u7684\u8868\u9762\uff0c\u663e\u793a\u4e86\u6587\u4e2d\u8ba8\u8bba\u7684\u70b9\u548c\u8f74\uff1b<\/p>\n

\uff08f\uff09\u901a\u8fc7\u5e7f\u4e49\u68af\u5ea6\u8fd1\u4f3c\uff08GGA\uff1b\u7070\u8272\uff09\u548cGGA\u52a0\u4e0a\u4fee\u6b63\u7684Becke-Johnson\u4ea4\u6362\u52bf\uff08mBJ\uff1b\u7eff\u8272\uff09\u83b7\u5f97\u7684\u65e0\u81ea\u65cb\u8f68\u9053\u8026\u5408\uff08SOC\uff09\u7684\u03b2\u76f8\u7684DFT\u8ba1\u7b97\uff1b<\/p>\n

\uff08g\uff09\u5305\u542bSOC\u7684\u03b2\u76f8\u7684\u53cd\u8f6c\u3002\u7ea2\u8272\u5706\u548c\u84dd\u8272\u5706\u5206\u522b\u6807\u8bb0M\u548cL\u70b9\u5904\u4f53\u5e26\u7684\u5076\u5e73\u5ea6(Ag\uff0c\u5bf9\u5e94\u4e8e\u6ce2\u51fd\u6570\u7684\u4e0d\u53ef\u7ea6)\u548c\u5947\u5e73\u5ea6(Bu<\/sub>)\u3002\u901a\u8fc7\u6539\u53d8mBJ\u4e2d\u7684\u53c2\u6570\u6765\u8c03\u6574\u95f4\u9699\u5927\u5c0f\u3002Ni\u4ee3\u8868\u666e\u901a\u7edd\u7f18\u5b50\uff1b<\/p>\n

\uff08h-k\uff09\u5b9e\u9645\u7a7a\u95f4\u4e2d\u03b2-Bi4<\/sub>I4<\/sub>\u7684TSS\u793a\u610f\u56fe\u53ca\u5176\u5728WTI\u76f8\uff08h\uff0ci\uff09\u548cSTI\u76f8\uff08j\uff0ck\uff09\u7684\u5012\u6613\u7a7a\u95f4\u4e2d\u7684\u80fd\u5e26\u8272\u6563\u5173\u7cfb\u3002<\/p>\n

\uff08l-o\uff09\u8ba1\u7b97\u4e86WTI\u76f8(l\uff0cm)\u548cSTI\u76f8(n\uff0co)\u6cbf\u4e0d\u540c\u7684\u9ad8\u5bf9\u79f0\u7ebf(e\u4e2d\u7684\u7ea2\u8272\u548c\u9ec4\u8272\u53cc\u5934\u7bad\u5934)\u5728\u4fa7\u9762(100)\u4e0a\u7684TSS\u8272\u6563\u3002\u989c\u8272\u6bd4\u4f8b\u8868\u793a\u4e3a\u66f2\u9762\u8ba1\u7b97\u7684\u5149\u8c31\u6743\u91cd\u3002<\/p>\n

\u56fe<\/b><\/strong>\u4e8c<\/b><\/strong>\u3001\u03b2-Bi<\/b><\/strong>4<\/b><\/sub><\/strong>I<\/b><\/strong>4<\/b><\/sub><\/strong>\u7684\u4e24\u4e2a<\/b><\/strong>\u88c2\u89e3<\/b><\/strong>\u9762<\/b><\/strong>\"\"<\/b><\/strong>\uff08a\uff09\u03b2-Bi4<\/sub>I4<\/sub>\u6837\u54c1\u7684\u5178\u578b(\u8fd1\u4f3c)\u5c3a\u5bf8\uff1b<\/p>\n

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\uff08d-m\uff09\u5728\u4e0d\u540c\u03b8\u503c\u4e0b\uff0c\u03b1\u76f8\uff08d-g\uff09\u548c\u03b2\u76f8\uff08h-m\uff09\u7684APRES\u5e26\u72b6\u56fe\uff0c\u5728\uff08f\uff09\u4e2d\uff0c\u53d1\u73b0\u03b1\u76f8\u4ef7\u5e26\u4e2d\u7684\u53cc\u5c42\u5206\u88c2\u4e0e\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\u8ba1\u7b97\u662f\u4e00\u81f4\u7684\uff0c\u5728\uff08j\uff09\u4e2d\u672a\u89c2\u5bdf\u5230\u03b2\u76f8\uff0cL\u548cm\u8868\u793a\u6cbf(100)\u9762Brillouin\u533a\u57df\u7684Z–<\/sup>\u70b9\uff08c\u4e2d\u7684\u9ec4\u8272\u7bad\u5934\uff09\u548c\u0393–<\/sup>\u70b9\uff08c\u4e2d\u7684\u7ea2\u8272\u7bad\u5934\uff09\u5207\u5272\u7684\u9ad8\u5bf9\u79f0\u7ebf\u7684ARPES\u5e26\u6620\u5c04\uff1b<\/p>\n

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\u56fe<\/b><\/strong>\u56db<\/b><\/strong>\u3001Hv=85eV\u65f6\u03b2-Bi<\/b><\/strong>4<\/b><\/sub><\/strong>I<\/b><\/strong>4<\/b><\/sub><\/strong>\u7684\u8868\u9762\u9009\u62e9\u6027\u7eb3\u7c73ARPES<\/b><\/strong>\"\"<\/b><\/strong>\uff08a\uff09\u8868\u9762\u9009\u62e9\u6027\u7eb3\u7c73ARPES\u5728\u03b2-Bi4<\/sub>I4<\/sub>\u7684\u4fa7\u7aef\u9762\uff08100\uff09\u7684\u51e0\u4f55\u793a\u610f\u56fe\uff1b<\/p>\n

\uff08b\uff09\u5de6\u4fa7\uff0c\u7531\u5149\u5b66\u663e\u5fae\u955c\u62cd\u6444\u7684\u88ab\u6d4b\u6837\u54c1\u5b9e\u7269\u56fe\u50cf\uff0c\u4e2d\u95f4\uff0c\u5149\u7535\u53d1\u5c04\u5f3a\u5ea6\u56fe\uff0c\u53f3\u4fa7\uff0c\u653e\u5927\u56fe\u50cf\uff0c\u767d\u8272\u5706\u5708\u8868\u793a\u8fdb\u884c\u8868\u9762\u9009\u62e9\u6027ARPES\u5b9e\u9a8c\u7684\u4f4d\u7f6e\uff1b<\/p>\n

\uff08c\uff09\u8868\u9762\u9009\u62e9\u6027\u7eb3\u7c73ARPES\u5728\uff08001\uff09\u9762\u7684\u51e0\u4f55\u793a\u610f\u56fe\uff1b<\/p>\n

\uff08d\uff0ce\uff09\u5206\u522b\u8868\u793a\u5728\u8d39\u7c73\u80fdEf<\/sub>\u5728\u4fa7\u9762\u548c\u9876\u90e8\u7684\u5149\u7535\u5b50\u5f3a\u5ea6\u5206\u5e03\uff0c\u5f3a\u5ea6\u96c6\u4e2d\u5728100meV\u5185\uff0c\u6ca1\u6709\u6837\u54c1\u65cb\u8f6c\u7684\u60c5\u51b5\u4e0b\uff0c\u5e76\u5229\u7528\u5149\u7535\u5206\u6790\u4eea\u7684\u7535\u5b50\u504f\u8f6c\u5668\u7684\u7279\u6027\u8fdb\u884c\u6536\u96c6\uff0c\uff08100\uff09\u9762\u7ea2\u8272\u865a\u7ebf\u8868\u793a\uff08d\uff09\u548c\uff08001\uff09\u9762\u9ed1\u8272\u865a\u7ebf\u8868\u793a\uff08e\uff09\uff1b<\/p>\n

\uff08f-i\uff09\u5728\uff08100\uff09\u9762\u7684\u0393–<\/sup>\u548cZ–<\/sup>\u70b9\u5904\u7684Ef<\/sub>\u503c\u5904\u7684ARPES\u5e26\u6620\u5c04\u548c\u52a8\u91cf\u5206\u5e03\u66f2\u7ebf\uff08MDCs\uff09\uff08\u84dd\u8272\u66f2\u7ebf\uff09\uff1b\uff08f\uff09\u548c\uff08h\uff09\u4e2d\u7684\u9ed1\u8272\u865a\u7ebf\u662f\u62df\u5408MDCs\u4e2d\u4e24\u4e2a\u5cf0\u7ed3\u6784\u7684Lorentzian\u66f2\u7ebf\uff0c\u5b83\u4eec\u7684\u5cf0\u503c\u4f4d\u7f6e\u7531\uff08f\uff09\u548c\uff08h\uff09\u4e2d\u7684\u7ea2\u6761\u8868\u793a\uff1b<\/p>\n

\uff08j\uff0ck\uff09\u5728\uff08001\uff09\u9762\u0393–<\/sup>\u70b9\u7684ARPES\u56fe\u50cf\uff08j\uff09\u548c\u5728Ef<\/sub>\u5904\u7684MDCs\uff08k\uff09\u3002<\/p>\n

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

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\u00a0<\/b><\/strong><\/p>\n

\u6587\u732e\u94fe\u63a5\uff1a\u201c<\/b><\/strong>A weak topological insulator state in quasi-one<\/b><\/u><\/strong>–<\/b><\/u><\/strong>dimensional bismuth iodide<\/b><\/u><\/strong><\/a>\u201d(<\/b><\/strong>N<\/b><\/strong>ature.<\/b><\/strong>\u00a0<\/b><\/strong>DOI:<\/b><\/strong>10.1038\/s41586-019-0927-7<\/b><\/strong>)<\/b><\/strong><\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u7f16\u8f91\u90e8\u5b66\u672f\u7ec4CYM\u7f16\u8bd1\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

\u6750\u6599\u4eba\u6295\u7a3f\u4ee5\u53ca\u5185\u5bb9\u5408\u4f5c\u53ef\u52a0\u7f16\u8f91\u5fae\u4fe1\uff1acailiaokefu \u3002<\/p>\n

 <\/p>\n

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

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