{"id":140944,"date":"2018-06-02T14:00:59","date_gmt":"2018-06-02T06:00:59","guid":{"rendered":"\/\/m.iemloyee.com\/?p=140944"},"modified":"2018-05-31T21:09:42","modified_gmt":"2018-05-31T13:09:42","slug":"nat-mater-%e8%83%bd%e8%b0%b7%e5%88%86%e8%a3%82%e7%9a%84%e4%ba%8c%e7%bb%b4%e5%8d%8a%e5%af%bc%e4%bd%93%e4%b8%ad%e7%9a%84holstein%e6%9e%81%e5%8c%96%e5%ad%90","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=140944","title":{"rendered":"Nat. Mater: \u80fd\u8c37\u5206\u88c2\u7684\u4e8c\u7ef4\u534a\u5bfc\u4f53\u4e2d\u7684Holstein\u6781\u5316\u5b50"},"content":{"rendered":"
\u3010\u5f15\u8a00\u3011<\/strong><\/p>\n \u7814\u7a76\u6781\u5316\u5b50\u7684\u5149\u8c31\u51fd\u6570\u662f\u7406\u89e3\u6781\u5316\u5b50\u52a8\u529b\u5b66\u7684\u5173\u952e\uff0c\u672c\u6587\u5bf9\u4e24\u4e2a\u6807\u51c6\u6a21\u578b\uff0c\u5373frollich\u6781\u5316\u5b50\u548cHolstein\u6781\u5316\u5b50\u8fdb\u884c\u4e86\u7814\u7a76\u3002\u540e\u8005\u662f\u4e00\u79cd\u66f4\u771f\u5b9e\u7684\u6781\u5316\u5b50\u6676\u683c\u6a21\u578b\uff0c\u5176\u7a7a\u95f4\u8303\u56f4\u53ef\u4ee5\u662f\u5728\u51e0\u4e2a\u539f\u5b50\u5185\u7684\u77ed\u7a0b(e-ph\u8026\u5408\u5e38\u6570\u03bb>1\u7684\u5c0f\u6781\u5316\u5b50)\u6216\u5728\u51e0\u4e2a\u539f\u5b50\u4e0a\u7684\u957f\u8ddd\u79bb(\u03bb< 1\u7684\u5927\u6781\u5316\u5b50)\u3002\u5373\u4f7f\u662f\u8fd9\u4e2a\u7b80\u5355\u7684\u6a21\u578b\u4e5f\u5f88\u96be\u89e3\u6790\u6c42\u89e3\uff0c\u800c\u4e14\u5fae\u6270\u7406\u8bba\u672a\u80fd\u89e3\u91ca\u5c0f\u6781\u5316\u5b50\u548c\u5927\u6781\u5316\u5b50\u4e4b\u95f4\u7684\u91cd\u8981\u4e2d\u95f4\u533a\u57df(\u03bb\u22481)\u3002\u6700\u8fd1\u7814\u7a76\u4eba\u5458\u7528\u4e0d\u540c\u7684\u7406\u8bba\u65b9\u6cd5\u6210\u529f\u5730\u8ba1\u7b97\u4e86\u03bb\u22481\u5904Holstein\u6781\u5316\u5b50\u7684\u5149\u8c31\u51fd\u6570\u3002\u8fd9\u4e9b\u5df2\u7ecf\u666e\u904d\u9884\u6d4b\u629b\u7269\u7ebf\u5e26\u4e2d\u7684\u7535\u5b50\u88abn\u4e2a\u58f0\u5b50\u6563\u5c04\u4ee5\u5f62\u6210e+nph\u8fde\u7eed\u4f53\u8868\u793a\u3002\u4e0e\u8fd9\u4e9b\u8fde\u7eed\u4f53\u6df7\u5408\u7684\u72b6\u6001\u4f7f\u629b\u7269\u7ebf\u5e26\u5206\u79bb\u6210\u4e00\u7cfb\u5217\u5b50\u5e26\uff0c\u5e76\u4f34\u968f\u7740\u5c0f\u95f4\u9699\u4ee5\u53ca\u5728\u58f0\u5b50\u80fd\u91cf\u6574\u6570\u500d(\u2013n\u03a90<\/sub>, n=1, 2, 3, \u2026)\u7684\u8272\u6563\u5e73\u5766\u5316\u3002\u5e73\u5766\u90e8\u5206\u7684\u5149\u8c31\u6743\u91cd\u88ab\u6291\u5236\uff0c\u4f7f\u5f97\u6a21\u62df\u7684\u5149\u8c31\u51fd\u6570\u770b\u8d77\u6765\u662f\u4e00\u7cfb\u5217\u7834\u788e\u5e26\uff0c\u8fd9\u4e0e\u4f20\u7edf\u7684\u626d\u7ed3\u3001\u5cf0\u8c37\u9a7c\u5cf0\u548c\u6296\u52a8\u4e0d\u540c\u3002Holstein\u6781\u5316\u5b50\u7684\u8fd9\u79cd\u7279\u5f81\u5149\u8c31\u51fd\u6570\u5e94\u8be5\u7528\u89d2\u5206\u8fa8\u5149\u7535\u53d1\u5c04\u5149\u8c31(ARPES)\u6765\u89c2\u5bdf\uff0c\u4f46\u7531\u4e8e\u7f3a\u4e4f\u5408\u9002\u7684\u6750\u6599\u4f53\u7cfb\uff0c\u76ee\u524d\u53ea\u5728\u8d85\u51b7\u539f\u5b50\u6c14\u4f53\u4e2d\u8fdb\u884c\u7814\u7a76\u3002<\/p>\n \u53e6\u4e00\u65b9\u9762\uff0c2H\u8fc7\u6e21\u91d1\u5c5e\u786b\u5316\u7269(TMDs)\u4f5c\u4e3a\u4e00\u7c7b\u5177\u6709\u8c37\u7b80\u5e76\u6027\u7684\u4e8c\u7ef4\u8303\u5fb7\u534e\u534a\u5bfc\u4f53\uff0c\u4e00\u76f4\u53d7\u5230\u5e7f\u6cdb\u5173\u6ce8\u3002\u8fd9\u79cd\u8c37\u81ea\u7531\u5ea6\u6253\u5f00\u4e86\u7531\u77ed\u6ce2\u957f\u58f0\u5b50\u4ecb\u5bfc\u7684\u4e24\u4e2a\u7b49\u4ef7\u8c37\u7535\u5b50\u6001\u4e4b\u95f4\u5f3a\u8026\u5408\u7684\u901a\u9053\uff0c\u8fd9\u6709\u53ef\u80fd\u7528\u4e8e\u7814\u7a76\u77ed\u8ddd\u79bbe-ph\u8026\u5408\u3002\u6b64\u5916\uff0c\u7814\u7a76\u4eba\u5458\u53d1\u73b0\u5728\u4f53(\u6216\u591a\u5c42) TMDs\u8868\u9762\u8fdb\u884c\u7535\u5b50\u63ba\u6742\u53ef\u4ee5\u5f62\u6210\u8d85\u5bfc\u5706\u9876\u3002\u76ee\u524d\u7814\u7a76\u4eba\u5458\u53d1\u73b0MoS2<\/sub>\u5177\u6709\u9ad8\u8fbe12k\u7684\u4e34\u754c\u6e29\u5ea6(Tc)\uff0c\u8fd9\u662fTMDs\u4e2d\u7684\u8bb0\u5f55\uff0c\u8fd9\u4f7f\u5f97\u63a2\u7d22\u5f3a\u7535\u5b50-\u73bb\u8272\u5b50\u8026\u5408\u7684\u7279\u5f81\u6210\u4e3a\u7406\u60f3\u3002\u76ee\u524d\u5df2\u7ecf\u6709ARPES\u5728\u4f53\u6216\u591a\u5c42TMDs\u4e0a\u7684\u5b9e\u9a8c\uff0c\u5176\u8868\u9762\u5c42\u901a\u8fc7\u6c89\u79ef\u78b1\u91d1\u5c5e\u539f\u5b50\u8fdb\u884c\u5316\u5b66\u63ba\u6742\uff0c\u8fd9\u662f\u5f62\u62102D\u7535\u5076\u6781\u5b50\u5c42\u7684\u6280\u672f\u3002\u7136\u800c\uff0c\u8fc4\u4eca\u4e3a\u6b62\uff0c\u8fd8\u6ca1\u6709\u5173\u4e8e\u7535\u5b50-\u73bb\u8272\u5b50\u8026\u5408\u7684\u660e\u786e\u8ff9\u8c61\u7684\u62a5\u9053\u3002<\/p>\n \u3010\u6210\u679c\u7b80\u4ecb\u3011<\/strong><\/p>\n \u8fd1\u65e5\uff0c\u6765\u81ea\u97e9\u56fd\u5ef6\u4e16\u5927\u5b66\u7684<\/strong>Keun Su Kim<\/strong>\u6559\u6388<\/strong>\u5728Nature Materials<\/strong>\u53d1\u6587\uff0c\u9898\u4e3a\uff1aHolstein polaron in a valley-degenerate two-dimensional semiconductor<\/strong>\u3002\u8be5\u56e2\u961f\u62a5\u9053\u4e86\u5728\u8868\u9762\u63ba\u6742\u7684\u5c42\u72b6\u534a\u5bfc\u4f53MoS2<\/sub>\u4e2d\u53d1\u73b0Holstein\u6781\u5316\u5b50\uff0c\u5176\u4e2d\u53d1\u73b0\u4e86\u4e00\u4e2a\u4ee4\u4eba\u8d39\u89e3\u7684\u4e34\u754c\u6e29\u5ea6\u4e3a12k\u76842D\u8d85\u5bfc\u5706\u9876\u3002\u5229\u7528\u7535\u8377\u8f7d\u6d41\u5b50\u7684\u9ad8\u5206\u8fa8\u7387\u80fd\u5e26\u6620\u5c04\uff0c\u8be5\u56e2\u961f\u53d1\u73b0\u5f3a\u80fd\u5e26\u91cd\u6574\u5316\u88ab\u8ba4\u4e3a\u662fHolstein\u6781\u5316\u5b50\u8fc4\u4eca\u672a\u89c2\u5bdf\u5230\u7684\u5149\u8c31\u51fd\u6570\u3002MoS2<\/sub>\u4e2d\u7535\u5b50-\u58f0\u5b50(e-ph)\u8026\u5408\u7684\u77ed\u7a0b\u6027\u8d28\u53ef\u4ee5\u7528\u5176\u8c37\u7b80\u5e76\u6027\u6765\u89e3\u91ca\uff0c\u8c37\u7b80\u5e76\u6027\u4f7f\u5f97\u58f0\u5b66\u58f0\u5b50\u4ecb\u5bfc\u7684\u5f3a\u901a\u9053\u95f4\u8026\u5408\u6210\u4e3a\u53ef\u80fd\u3002\u8026\u5408\u5f3a\u5ea6\u6cbf\u8d85\u5bfc\u7a79\u9762\u9010\u6e10\u589e\u5927\uff0c\u76f4\u81f3\u4e2d\u95f4\u533a\u57df\uff0c\u8fd9\u8868\u660e\u4e8c\u7ef4\u8d85\u5bfc\u4e2d\u5b58\u5728\u53cc\u6781\u5316\u5b50\u5bf9\u3002<\/p>\n \u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/strong><\/p>\n \u56fe1. MoS2<\/sub>\u7684\u8377\u65af\u5766\u6781\u5316\u5b50<\/strong><\/p>\n a . MoS2<\/sub>\u4e2d\u6781\u5316\u5b50\u7684\u793a\u610f\u56fe\uff1b<\/p>\n b\u3001MoS2<\/sub>\u4e2dHolstein\u6781\u5316\u5b50\u7684\u80fd\u8c31\uff0c\u8fd9\u662f\u7531\u58f0\u5b50\u4ecb\u5bfc\u7684K\u548cK\u2032\u8c37\u4e4b\u95f4\u7684\u5f3a\u8026\u5408(\u7bad\u5934)\u5f15\u8d77\u7684\uff1b<\/p>\n c\u3001\u57fa\u4e8ek\u5e73\u5747\u8fd1\u4f3c(\u65b9\u6cd5)\u7684\u96f6(\u03bb= 0)\u548c\u4e2d\u95f4(\u03bb= 0.5) e-ph\u8026\u5408\u7684\u8377\u5c14\u65af\u6cf0\u56e0\u6781\u5316\u5b50\u7684\u6a21\u62df\u8c31\u51fd\u6570\uff1b<\/p>\n d\u3001\u63ba\u6709Rb\u539f\u5b50\u7684\u4e8c\u6c27\u5316\u7845\u5728\u03c1=5\u00d71013 cm\u2013<\/sup>2<\/sup>\u5904\u7684ARPES\u5149\u8c31\u7684\u4e09\u7ef4\u8868\u793a\uff1b<\/p>\n e\u3001\u5728d\u4e2d\u7ea2\u8272\u865a\u7ebf\u6846\u5305\u56f4\u7684\u533a\u57df\u83b7\u53d6\u7684\u9ad8\u5206\u8fa8\u7387ARPES\u6570\u636e\uff0c\u5e76\u76f8\u5bf9\u4e8eK\u70b9\u7684\u5bf9\u79f0\u5316\uff1b<\/p>\n \u56fe2. Holstein\u6781\u5316\u5b50\u7684\u5149\u8c31\u51fd\u6570<\/strong><\/p>\n a\u3001K\u5904\u4eceK\u70b9\u5230\u8d39\u7c73\u52a8\u91cf(kF)\u7684\u4e00\u7cfb\u5217EDCs\uff0c\u6b65\u957f\u4e3a0.007 \u00c5\u20131<\/sup>\uff1b<\/p>\n b\u3001\u4f5c\u4e3ak .\u03b4n\u51fd\u6570\u7ed8\u5236\u7684\u78c1\u6781\u80fd\u91cf\u4f4d\u7f6e\u662f\u5728\u2013n\u03a90<\/sub>\u548ckn<\/sub>\u5904\u7684\u53cd\u4ea4\u53c9\u95f4\u9699\uff1b<\/p>\n c\uff0c\u6cbfb\u4e2d\u7ea2\u8272\u6240\u793a\u7684\u6781\u5316\u5b50\u8272\u6563\uff1b<\/p>\n d . b (\u65b9\u6cd5)\u4e2d\u5e73\u5766\u8272\u6563\u533a\u03bb= 0.5\u7684\u6a21\u62df\u8c31\u51fd\u6570\uff1b<\/p>\n e\u3001\u4e3a\u56fe1d\u4e2dT\u70b9\u548cK\u70b9\u4e4b\u95f4\u7531\u9ed1\u8272\u865a\u7ebf\u6846\u5305\u56f4\u7684\u533a\u57df\u83b7\u53d6\u7684\u9ad8\u5206\u8fa8\u7387ARPES\u6570\u636e\uff1b<\/p>\n f\uff0ce\u4e2d\u6240\u793a\u6570\u636e\u7684\u96c6\u6210EDC\uff1b<\/p>\n \u56fe3. \u6781\u5316\u5b50\u7684\u63ba\u6742\u4f9d\u8d56\u6027<\/strong><\/p>\n a\uff0cb\uff0c\u5728\u6bcf\u4e2a\u9762\u677f\u5e95\u90e8\u7ed9\u51fa\u7684\u03c1(103<\/sup> cm\u20132<\/sup>)\u5904\u83b7\u5f97\u7684ARPES\u7cfb\u5217\u5149\u8c31\uff0c\u5149\u5b50\u80fd\u91cf\u4e3a54ev\uff0c\u6837\u54c1\u6e29\u5ea6\u4e3a7k\uff1b<\/p>\n c\u3001\u56fea\u6570\u636e\u4e2d\u5728kF<\/sub>\u5904\u7684EDC\uff1b<\/p>\n d\u3001\u56fec\u4e2d\u76f8\u5e94\u5cf0\u4f4d\uff1b<\/p>\n \u56fe4. e-ph\u8026\u5408\u5f3a\u5ea6\u548c\u8d85\u5bfc\u6027<\/strong><\/p>\n a\u3001\u6781\u5316\u5b50\u5e26(\u5b9e\u5fc3\u5706)\u548c\u88f8\u5e26(\u7a7a\u5fc3\u5706)\u7684\u6709\u6548\u8d28\u91cf\u7ed8\u5236\u4e3a\u03c1\u7684\u51fd\u6570\uff1b<\/p>\n b\u3001\u5728\u4e24\u4e2aK\u8c37\u5177\u6709\u76f8\u53cd\u81ea\u65cb\u7684\u4e24\u4e2a\u6781\u5316\u5b50\u901a\u8fc7\u58f0\u5b50\u4ea4\u6362(\u53cc\u6781\u5316\u5b50\u8026\u5408)\u8026\u5408\u793a\u610f\u56fe\uff1b<\/p>\n \u3010\u7ed3\u8bba\u3011<\/strong><\/p>\n \u8fd9\u4e9b\u5b9e\u9a8c\u7ed3\u679c\u8868\u660e\uff0c\u58f0\u5b66\u58f0\u5b50\u4ea4\u6362\u4e2d\u6781\u5316\u5b50\u7684\u901a\u9053\u95f4\u8026\u5408(\u53cc\u6781\u5316\u5b50\u8026\u5408)\u53ef\u80fd\u5728Cooper\u5bf9\u7684\u5f62\u6210\u4e2d\u8d77\u5173\u952e\u4f5c\u7528\uff0c\u8fd9\u4e0e\u901a\u9053\u95f4\u5355\u7ebf\u5bf9\u7684\u56fe\u50cf\u662f\u4e00\u81f4\u7684\u3002\u56e0\u6b64\uff0c\u5728\u8fdb\u4e00\u6b65\u8ba8\u8bba\u548c\u7406\u8bba\u7814\u7a76\u8d85\u5bfc\u673a\u5236\u65f6\uff0c\u8be5\u56e2\u961f\u5bf9MoS2<\/sub>\u4e2dHolstein\u6781\u5316\u5b50\uff0c\u4ee5\u53ca\u5bf9\u5176\u5728\u9ad8Tc<\/sub> FeSe\/SrTiO3<\/sub>\u548cSrTiO3<\/sub>\u4e2d\u7684\u957f\u7a0b\u5bf9\u5e94\u4f53\u7684\u8fdb\u884c\u4e86\u89c2\u5bdf\u3002\u8be5\u56e2\u961f\u5728MoS2<\/sub>\u4e2d\u89c2\u5bdf\u5230Holstein\u6781\u5316\u5b50\u4e5f\u53ef\u80fd\u6709\u52a9\u4e8e\u7406\u89e3MoS2<\/sub>\u57fa\u5668\u4ef6\u4e2d\u7684\u8f7d\u6d41\u5b50\u8fc1\u79fb\u7387\u548c\u52a8\u529b\u5b66\u3002<\/p>\n \u6587\u732e\u94fe\u63a5\uff1a<\/strong>Holstein polaron in a valley-degenerate two-dimensional semiconductor<\/a>, (Nature Materials, 2018, DOI: 10.1038\/s41563-018-0092-7)<\/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 \u6750\u6599\u725b\u7f51\u4e13\u6ce8\u4e8e\u8ddf\u8e2a\u6750\u6599\u9886\u57df\u79d1\u6280\u53ca\u884c\u4e1a\u8fdb\u5c55\uff0c\u8fd9\u91cc\u6c47\u96c6\u4e86\u5404\u5927\u9ad8\u6821\u7855\u535a\u751f\u3001\u4e00\u7ebf\u79d1\u7814\u4eba\u5458\u4ee5\u53ca\u884c\u4e1a\u4ece\u4e1a\u8005\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\u6750\u6599\u4eba\u7f16\u8f91\u90e8<\/a>\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\u3002<\/p>\n<\/p>\n
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