{"id":232105,"date":"2022-01-24T06:40:17","date_gmt":"2022-01-23T22:40:17","guid":{"rendered":"\/\/m.iemloyee.com\/?p=232105"},"modified":"2022-01-23T18:40:26","modified_gmt":"2022-01-23T10:40:26","slug":"%e5%93%88%e4%bd%9b%e5%a4%a7%e5%ad%a6nature-communications%ef%bc%9a%e5%8d%95%e5%b1%82wse2%e5%b1%80%e9%83%a8%e5%ba%94%e5%8f%98%e4%b8%ad%e7%9a%84%e6%9a%97%e6%bf%80%e5%ad%90","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=232105","title":{"rendered":"\u54c8\u4f5b\u5927\u5b66Nature Communications\uff1a\u5355\u5c42WSe2\u5c40\u90e8\u5e94\u53d8\u4e2d\u7684\u6697\u6fc0\u5b50"},"content":{"rendered":"
\u5f15\u8a00<\/strong><\/p>\n WSe2<\/sub>\u5355\u5c42\u662f\u76f4\u63a5\u5e26\u9699\u534a\u5bfc\u4f53\uff0c\u5176\u5149\u5b66\u7279\u6027\u53d7\u675f\u7f1a\u7535\u5b50-\u7a7a\u7a74\u5bf9(\u5373\u6fc0\u5b50)\u7684\u5b58\u5728\u6240\u652f\u914d\u3002WSe2<\/sub>\u662f\u66f4\u5927\u7c7b\u522b\u7684\u534a\u5bfc\u4f53\u8fc7\u6e21\u91d1\u5c5e\u4e8c\u5364\u65cf\u5316\u5408\u7269(TMDs)\u7684\u6210\u5458\uff0c\u5b83\u6709\u51e0\u4e2a\u5438\u5f15\u4eba\u7684\u7279\u6027: \u5176\u5355\u5c42\u5177\u6709\u5149\u5b66\u6697\u6fc0\u5b50\u57fa\u6001<\/strong><\/span>\uff0c\u53ef\u4ee5\u5bb9\u7eb3\u5355\u5149\u5b50\u6e90\uff0c\u5e76\u5177\u6709\u6f5c\u5728\u7684\u6fc0\u5b50\u6f0f\u6597\u3002\u5173\u952e\u662f\uff0c\u5728WSe2<\/sub>\u5355\u5c42\u4e0a\u65bd\u52a0\u7684\u5c40\u90e8\u5e94\u53d8\u53ef\u4ee5\u7528\u6765\u63a7\u5236\u6fc0\u5b50\u7684\u80fd\u91cf\uff0c\u8bf1\u5bfc\u6f0f\u6597\uff0c\u5e76\u5b9e\u73b0\u5355\u5149\u5b50\u6e90\u3002<\/p>\n \u4e4b\u524d\u7684\u7814\u7a76\u4e2d\uff0c\u5bf9\u539f\u5b50\u8584\u7684\u534a\u5bfc\u4f53\u4e2d\u5c40\u90e8\u5e94\u53d8\u6548\u5e94\u7684\u7814\u7a76\u4ec5\u9650\u4e8e\u9759\u6001\u6216\u5ba4\u6e29\u3002\u5728\u4f4e\u6e29\u73af\u5883\u4e2d\u52a8\u6001\u5e94\u7528\u5e94\u53d8\u65b9\u9762\u7684\u91cd\u8981\u8fdb\u5c55\u8fc4\u4eca\u4ecd\u505c\u7559\u5728\u4f4e\u5e94\u53d8\u72b6\u6001(<0.5%)<\/strong>\u3002\u56e0\u6b64\uff0c\u5728\u9ad8\u5e94\u53d8\u65f6\uff0c\u5c40\u90e8\u5e94\u53d8\u5bf9\u6fc0\u5b50\u6027\u8d28\u7684\u7cbe\u786e\u5f71\u54cd\u8fd8\u672a\u88ab\u8be6\u7ec6\u7814\u7a76\u3002<\/p>\n \u8fd9\u9879\u6700\u65b0\u7814\u7a76\u901a\u8fc7\u5728\u4f4e\u6e29\u4e0b\u52a8\u6001\u751f\u6210\u4e9a\u5fae\u7c73\u5c3a\u5ea6(~100 nm)\u7684\u5e94\u53d8\uff0c\u7cfb\u7edf\u5730\u9610\u8ff0\u4e86\u5c40\u90e8\u65bd\u52a0\u5e94\u53d8\u5bf9WSe2<\/sub>\u5355\u5c42\u4e2d\u81ea\u7531(\u4e0e\u7f3a\u9677\u675f\u7f1a\u76f8\u53cd)\u6fc0\u5b50\u7684\u4f5c\u7528\u3002\u4f5c\u8005\u4f7f\u7528\u7eb3\u7c73\u96d5\u523b\u7684\u9525\u5f62\u5149\u7ea4\u7684\u5c16\u7aef\u5b9e\u73b0WSe2<\/sub>\u5355\u5c42\u7684\u5c40\u90e8\u5f62\u53d8\uff0c\u5e76\u5149\u5b66\u63a2\u6d4b\u8be5\u533a\u57df\u3002\u5c06\u5149\u7ea4\u5b89\u88c5\u5728\u538b\u7535\u7eb3\u7c73\u5b9a\u4f4d\u5668\u4e0a\uff0c\u80fd\u591f\u63a7\u5236\u548c\u53ef\u9006\u5730\u62c9\u4f38\u60ac\u6d6e\u7684WSe2<\/sub>\u5355\u5c42\u3002\u5229\u7528\u5149\u7ea4\u7684\u57fa\u6a21\u5728\u5149\u7ea4\u7684\u4fa7\u9762\u6fc0\u53d1\u548c\u6536\u96c6\u53d1\u5c04\u6765\u5b9e\u73b0\u5149\u5b66\u8868\u5f81\u3002\u8bbe\u8ba1\u7684\u5149\u7ea4\u5c16\u7aef\u534a\u5f84\u4e3a240 nm\uff0c\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u63d0\u9ad8~700 nm\u5149\u7684\u8026\u5408\u6548\u7387\uff0c\u540c\u65f6\u4fdd\u6301\u826f\u597d\u7684\u5c40\u57df\u6fc0\u53d1\u548c\u6536\u96c6\u5256\u9762\u3002\u4f5c\u8005\u5728\u4e24\u5c42\u516d\u65b9\u6c2e\u5316\u787c(hBN)\u4e4b\u95f4\u5c01\u88c5\u4e86\u5355\u5c42WSe2<\/sub>\uff0c\u4ee5\u589e\u52a0\u6297\u6495\u88c2\u80fd\u529b\u3002WSe2<\/sub>\u5355\u5c42\u7684\u5c01\u88c5\u548c\u60ac\u6d6e\u4e5f\u53ef\u4ee5\u6539\u5584\u7a7a\u95f4\u5747\u5300\u7684\u5149\u5b66\u6027\u80fd\u3002<\/p>\n \u7814\u7a76\u8fdb\u5c55<\/strong><\/p>\n \u8fd1\u65e5\uff0c\u54c8\u4f5b\u5927\u5b66\u7684<\/strong>Hongkun Park<\/strong>\u548c<\/strong>Marko Lon\u010dar<\/strong>\uff08\u5171\u540c\u901a\u8baf\uff09<\/strong>\u7b49\u4eba\u5f00\u53d1\u4e86\u4e00\u79cd\u6280\u672f\uff0c\u7528\u4e8e\u63a2\u6d4b\u8fd9\u79cd\u5355\u5c42\u819c\u4e2d\u7eb3\u7c73\u5c3a\u5ea6\u5e94\u53d8\u4e2d\u7684\u81ea\u7531\u6fc0\u5b50\u52a8\u529b\u5b66\u3002\u5229\u7528\u7eb3\u7c73\u9525\u5f62\u5149\u7ea4\u57285 K\u65f6\u4ea7\u751f\u5e94\u53d8\uff0c\u540c\u65f6\u63a2\u6d4bWSe2<\/sub>\u5355\u5c42\u7684\u8fd1\u573a\u5149\u54cd\u5e94\u3002\u5f53\u5355\u5c42\u88ab\u5149\u7ea4\u63a8\u52a8\u65f6\uff0c\u5176\u6700\u4f4e\u80fd\u6001\u4f4d\u79fb\u9ad8\u8fbe390 meV(> WSe2<\/sub>\u5355\u5c42\u5e26\u9699\u768420%)\u3002\u8fd9\u4e9b\u7ea2\u79fb\u5cf0\u7684\u504f\u632f\u548c\u5bff\u547d\u6d4b\u91cf\u8868\u660e\u5b83\u4eec\u8d77\u6e90\u4e8e\u6697\u6fc0\u5b50\u3002\u81ea\u7531\u6697\u6fc0\u5b50\u5728\u5176\u957f\u5bff\u547d\u671f\u95f4\u88ab\u6c47\u96c6\u5230\u9ad8\u5e94\u53d8\u533a\u57df\uff0c\u5e76\u4e14\u662f\u4f4e\u6e29\u4e0b\u6f02\u79fb\u548c\u6269\u6563\u7684\u4e3b\u8981\u53c2\u4e0e\u8005\u3002\u76f8\u5173\u6210\u679c\u53d1\u8868\u5728Nature Communications<\/strong><\/em> (\u201cProbing dark exciton navigation through a local strain landscape in a WSe2 monolayer\u201d, DOI: 10.1038\/s41467-021-27877-2)<\/strong>\u4e0a\u3002<\/p>\n \u56fe\u6587\u4ecb\u7ecd<\/strong><\/p>\n \u56fe1<\/strong>\u00a0\u5e94\u53d8\u76f8\u5173\u5149\u8c31\u7684\u4f4e\u6e29\u7ea4\u7ef4\u6280\u672f\u00a0\u00a9 2022 The Authors<\/span><\/p>\n a \u4e0ehBN\/WSe2<\/sub>\/hBN\u5f02\u8d28\u7ed3\u6784\u7684\u5149\u7ea4\u63a5\u53e3\u793a\u610f\u56fe\u3002<\/p>\n b 240 nm\u534a\u5f84\u7684\u5149\u7ea4\u5c16\u7aef\u548c700 nm\u7684\u6fc0\u53d1\u548c\u6536\u96c6\u66f2\u7ebf\u7684\u6a21\u62df;<\/p>\n c \u4f4e\u6e29\u73af\u5883(T = 5 K)\u4e0b\u901a\u8fc7\u5668\u4ef6\u5e76\u901a\u8fc7\u5149\u7ea4\u91c7\u96c6\u7684\u767d\u5149(\u5982\u56fe\u6240\u793a)\u5149\u8c31;<\/p>\n d 5 K\u6761\u4ef6\u4e0b\u5149\u7ea4\u6536\u96c6\u5230\u7684PL;<\/p>\n e \u5f53\u901a\u8fc7\u589e\u52a0\u538b\u7535\u5b9a\u4f4d\u5668\u7535\u538b\u6765\u63a8\u52a8\u5149\u7ea4\u8bbe\u5907\u65f6\uff0cXA:1s<\/sub>\u900f\u8fc7\u5cf0\u7684\u80fd\u91cf\u968f\u7740\u7ea4\u7ef4\u4f4d\u79fb\u7684\u589e\u52a0\u800c\u964d\u4f4e;<\/p>\n f \u5bf9\u4e8ee\u4e2d\u76f8\u540c\u7684\u5149\u7ea4\u4f4d\u79fb\uff0c PL\u4e2dX0<\/sup>\u548cX\u2212<\/sup>\u7684\u80fd\u91cf\u51cf\u5c0f;<\/p>\n \u56fe2\u00a0<\/strong>\u5e94\u53d8\u8bf1\u5bfc\u6fc0\u5b50\u54cd\u5e94\u5728T = 5 K\u65f6\u7684\u900f\u5c04\u7387\u548c\u53ef\u8c03\u6027\u7684PL\u8c31 \u00a0\u00a9 2022 The Authors<\/span><\/p>\n a \u5bf9\u4e8e\u5668\u4ef6D3\uff0c\u5f53Vp<\/sub> = 0(\u5728\u5f02\u8d28\u7ed3\u6784\u4e0e\u5149\u7ea4\u63a5\u89e6\u4e4b\u524d)\u548cVp<\/sub> = 10 V\u65f6\uff0c XA:1s<\/sub>\u7684\u900f\u8fc7\u5cf0;<\/p>\n b \u5149\u7ea4\u6536\u96c6\u5230\u7684PL\u5728Vp<\/sub> = 0\u5904\u6709\u4e00\u4e2a\u7279\u5f81X0<\/sup>\uff0c\u4e0eXA:1s<\/sub>\u7684\u80fd\u91cf\u76f8\u5339\u914d;<\/p>\n c PL\u8c31\u968f\u538b\u7535\u5b9a\u4f4d\u5668\u7535\u538b\u7684\u53d8\u5316\u5448\u73b0\u51fa\u4e24\u4e2a\u7279\u5f81\u5206\u652f;<\/p>\n \u56fe3<\/strong>\u00a0\u7528\u504f\u632f\u9009\u62e9\u6027PL\u5149\u8c31\u6cd5\u6d4b\u91cf\u8dc3\u8fc1\u5076\u6781\u77e9 \u00a0\u00a9 2022 The Authors<\/span><\/p>\n a \u5229\u7528\u504f\u632f\u9009\u62e9\u6027\u5171\u805a\u7126\u4eceWSe2<\/sub>\u5355\u5c42\u4fa7\u9762\u6536\u96c6\u5149\u7684\u65b9\u6848;<\/p>\n b \u5728\u5668\u4ef6\u5f62\u53d8(Vp = 0)\u4e4b\u524d\uff0c\u9009\u62e9X\u504f\u632f\u5149\u65f6\u51fa\u73b0X\u2212<\/sup>\uff0c\u9009\u62e9z\u504f\u632f\u5149\u65f6\u51fa\u73b0D0;<\/sup><\/p>\n c \u5728Vp<\/sub> = 10 V\u65f6\uff0c\u7ea2\u79fb\u7279\u5f81(<1.6 eV)\u7684z\u6781\u5316\u7a0b\u5ea6\u8fdc\u8fdc\u5927\u4e8e\u6c34\u5e73\u5206\u91cf(~1.7 eV);<\/p>\n \u56fe4<\/strong>\u00a0\u6697\u548c\u4eae\u6fc0\u5b50\u7a7f\u8d8a\u5c40\u90e8\u5e94\u53d8 \u00a0\u00a9 2022 The Authors<\/span><\/p>\n a \u65f6\u95f4\u5206\u8fa8PL;<\/p>\n b hBN\/WSe2<\/sub>\/hBN\u5f02\u8d28\u7ed3\u6784\u4e2d\u5e94\u53d8\u7684\u6709\u9650\u5143\u5efa\u6a21;<\/p>\n c \u7531\u7ea4\u7ef4\u9762\u5f15\u8d77\u7684\u5e94\u53d8\u8bf1\u5bfc\u80fd\u91cf\u52bf\u793a\u610f\u56fe\uff1b<\/p>\n \u603b\u7ed3<\/strong><\/p>\n \u4f5c\u8005\u5f00\u53d1\u7684\u5b9e\u9a8c\u6280\u672f\u80fd\u591f\u5b9e\u73b0\u5728WSe2<\/sub>\u5355\u5c42\u4e2d\u5c40\u90e8\u4ea7\u751f\u548c\u5149\u5b66\u63a2\u6d4b\u5e94\u53d8\u573a\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5229\u7528\u5e94\u53d8\uff0c\u4f5c\u8005\u5b9e\u73b0\u4e86\u9ad8\u8fbe390 meV\u7684\u6697\u6fc0\u5b50PL\u5cf0\u7ea2\u79fb\uff0c\u8fd9\u76f8\u5f53\u4e8e\u672a\u5e94\u53d8\u7684WSe2<\/sub>\u5355\u5c42\u5e26\u9699\u768420%\u3002\u7535\u8377\u63a7\u5236\u4e0e\u5668\u4ef6\u5e94\u53d8\u517c\u5bb9\u3002\u8fd9\u79cd\u7279\u6b8a\u7684\u53ef\u8c03\u8c10\u6027\uff0c\u4ece\u53ef\u89c1\u5149\u5230\u8fd1\u7ea2\u5916\uff0c\u7a81\u51fa\u4e86\u4e8c\u7ef4\u6750\u6599\u5b9e\u73b0\u65b0\u578b\u5149\u7535\u5668\u4ef6\u7684\u6f5c\u529b\u3002\u6700\u540e\uff0c\u4f5c\u8005\u63ed\u793a\u4e86\u6697\u6fc0\u5b50\u5728\u7a7f\u8d8a\u5e94\u53d8\u573a\u7684\u80fd\u91cf\u4f20\u8f93\u4e2d\u6240\u626e\u6f14\u7684\u89d2\u8272\u3002\u867d\u7136\u5df2\u7ecf\u7406\u89e3\u8fd9\u4e9b\u5355\u5149\u5b50\u6e90\u53ef\u80fd\u6765\u81ea\u6fc0\u5b50\u4e0e\u7f3a\u9677\u7684\u7ed3\u5408\uff0c\u4f46\u6fc0\u5b50\u5982\u4f55\u6709\u6548\u5730\u5230\u8fbe\u7f3a\u9677\u8fd8\u4e0d\u6e05\u695a\uff0c\u6697\u6fc0\u5b50\u7684\u57fa\u672c\u4f5c\u7528\u4ee5\u524d\u4e5f\u6ca1\u6709\u88ab\u5b9e\u9a8c\u9a8c\u8bc1\u3002\u56e0\u6b64\uff0c\u672c\u6587\u7ed3\u679c\u652f\u6301\u4e86\u6700\u8fd1\u7684\u7406\u8bba\u8bf4\u6cd5\uff0c\u5373\u81ea\u7531\u6697\u6fc0\u5b50\u7684\u6709\u6548\u6f0f\u6597\u662f\u5c40\u90e8\u5e94\u53d8\u4e0b\u5f62\u6210\u5355\u5149\u5b50\u6e90\u7684\u5173\u952e\u56e0\u7d20\u3002\u672c\u6587\u7ed3\u679c\u8fd8\u8868\u660e\uff0cMoSe2<\/sub>\u5355\u5c42\u4e2d\u5e94\u53d8\u8bf1\u5bfc\u5355\u5149\u5b50\u6e90\u7684\u7f3a\u4e4f\u53ef\u80fd\u6e90\u4e8e\u6697\u6fc0\u5b50\u4e0d\u662f\u8be5\u7cfb\u7edf\u4e2d\u6700\u4f4e\u80fd\u91cf\u6fc0\u5b50\u72b6\u6001\u7684\u4e8b\u5b9e\uff0c\u8fd9\u4e3a\u4e00\u4e9b\u7406\u8bba\u8457\u4f5c\u4e2d\u63d0\u51fa\u7684\u89e3\u91ca\u63d0\u4f9b\u4e86\u53e6\u4e00\u79cd\u89e3\u91ca\u3002<\/p>\n<\/p>\n
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