{"id":93860,"date":"2017-08-02T06:30:56","date_gmt":"2017-08-01T22:30:56","guid":{"rendered":"\/\/m.iemloyee.com\/?p=93860"},"modified":"2017-08-02T08:40:39","modified_gmt":"2017-08-02T00:40:39","slug":"phys-rev-lett-%ef%bc%9a%e5%8d%95%e5%b1%82wse2%e4%b8%ad%e6%9d%9f%e7%bc%9a%e6%bf%80%e5%ad%90%e7%9a%84%e7%bc%ba%e9%99%b7%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=93860","title":{"rendered":"Phys. Rev. Lett.\uff1a\u5355\u5c42WSe2\u4e2d\u675f\u7f1a\u6fc0\u5b50\u7684\u7f3a\u9677\u7ed3\u6784"},"content":{"rendered":"<p><strong>\u3010\u5f15\u8bed\u3011<\/strong><\/p>\n<p>\u5355\u5c42\u76f4\u63a5\u5e26\u9699\u534a\u5bfc\u4f53\u8fc7\u6e21\u91d1\u5c5e\u4e8c\u786b\u5c5e\u5316\u7269\uff08TMD\uff09MX<sub>2<\/sub>\uff08M=Mo\uff0cW\uff1bX=S\uff0cSe\uff09\u5728\u7535\u5b50\u5b66\u3001\u5149\u7535\u5b50\u5b66\u4ee5\u53ca\u80fd\u8c37\u7535\u5b50\u5b66\u7b49\u9886\u57df\u5f15\u8d77\u4e86\u5e7f\u6cdb\u5173\u6ce8\u3002\u7136\u800c\uff0c\u5178\u578b\u7684TMD\u573a\u6548\u5e94\u6676\u4f53\u7ba1\u5668\u4ef6\u5728\u6ca1\u6709\u63ba\u6742\u65f6\u4e3b\u8981\u8868\u73b0\u4e3an\u578b\u6216p\u578b\uff0c\u4e0e\u5b8c\u7f8e\u6676\u4f53\u7ed3\u6784\u76f8\u77db\u76fe\uff0c\u5e76\u4e14\u8f7d\u6d41\u5b50\u8fc1\u79fb\u7387\u8fdc\u4f4e\u4e8e\u7406\u8bba\u503c\u3002\u6b64\u5916\uff0c\u5149\u81f4\u53d1\u5149\u5149\u8c31\u4e0d\u4ec5\u53ef\u4ee5\u8868\u5f81\u51fa\u5f3a\u6fc0\u5b50\u6548\u5e94\uff0c\u5176\u53d1\u5149\u6548\u7387\u8fdc\u4f4e\u4e8e\u5bf9\u76f4\u63a5\u5e26\u9699\u534a\u5bfc\u4f53\u7684\u9884\u671f\uff0c\u4e14\u53ef\u5728\u5149\u7981\u5e26\u533a\u57df\u51fa\u73b0\u4e00\u4e2a\u5bbd\u7684\u7f3a\u9677\u6d3b\u6027\u5cf0\u3002\u56e0\u6b64\uff0c\u7ed3\u6784\u7f3a\u9677\u5bf9\u5355\u5c42TMD\u7684\u5149\u7535\u6027\u80fd\u5177\u6709\u5f88\u5927\u7684\u5f71\u54cd\u3002\u76ee\u524d\uff0c\u5927\u591a\u6570\u5355\u5c42TMD\u4e3an\u578b\u63ba\u6742\uff0c\u4f46WSe<sub>2<\/sub>\u8868\u73b0\u4e3ap\u578b\u63ba\u6742\u3002\u8fd9\u79cdp\u578b\u63ba\u6742\u7ed3\u5408\u5176\u4ed6TMD\u6750\u6599\u53ef\u5f62\u6210p-n\u7ed3\u5e73\u9762\u5f02\u8d28\u7ed3\u6784\u3002\u7531\u4e8e\u4ef7\u5e26\u4e0a\u8f83\u5927\u7684\u81ea\u65cb\u8f68\u9053\u5206\u88c2\u548c\u81ea\u65cb-\u80fd\u8c37\u7684\u9501\u5b9a\uff0cp\u578b\u63ba\u6742\u7684\u80fd\u8c37\u76f8\u5e72\u65f6\u95f4\u53ef\u957f\u81f31-10 ns\uff0c\u800cn\u578b\u63ba\u6742\u4e00\u822c\u53ea\u670910 ps\u5de6\u53f3\u3002\u6b64\u5916\uff0c\u5355\u5c42WSe<sub>2<\/sub>\u51b7\u5374\u81f3~10K\u4ee5\u4e0b\u65f6\uff0c\u5176\u7f3a\u9677\u4e2d\u675f\u7f1a\u6fc0\u5b50\u7684\u53d1\u5149\u884c\u4e3a\u8868\u73b0\u4e3a\u5355\u91cf\u5b50\u53d1\u5149\u70b9\uff08SQEs\uff09,\u8fd9\u53ef\u5e94\u7528\u4e8e\u91cf\u5b50\u4fe1\u606f\u5904\u7406\u3002\u7136\u800c\uff0c\u5f53\u524d\u5bf9\u5355\u5c42WSe<sub>2<\/sub>\u4e2d\u7f3a\u9677\u7684\u539f\u5b50\u548c\u7535\u5b50\u7ed3\u6784\u7684\u7814\u7a76\u5c1a\u4e0d\u6e05\u695a\u3002<\/p>\n<p><strong><b>\u3010\u6210\u679c\u7b80\u4ecb\u3011<\/b><\/strong><\/p>\n<p>\u8fd1\u65e5\uff0c<strong><b>\u590d\u65e6\u5927\u5b66<\/b><\/strong><strong><b>\u5f20\u5e05<\/b><\/strong><strong><b>\uff08<\/b><\/strong><strong><b>\u7b2c\u4e00\u4f5c\u8005<\/b><\/strong><strong><b>\uff09<\/b><\/strong><strong><b>,<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>\u590d\u65e6\u5927\u5b66\u5434\u65bd\u4f1f<\/b><\/strong><strong><b>\u6559\u6388\u3001<\/b><\/strong><strong><b>\u4e2d\u56fd\u4eba<\/b><\/strong><strong><b>\u6c11<\/b><\/strong><strong><b>\u5927\u5b66<\/b><\/strong><strong><b>\u5b63\u5a01<\/b><\/strong><strong><b>\u6559\u6388\uff08<\/b><\/strong><strong><b>\u5171\u540c<\/b><\/strong><strong><b>\u901a\u8baf\uff09<\/b><\/strong>\u5728<strong><b>Phys. Rev. Lett.<\/b><\/strong>\u53d1\u8868\u4e86\u201c<strong><b>Defect Structure of Localized Excitons in a WSe<\/b><\/strong><strong><sub><b>2<\/b><\/sub><\/strong><strong><b>\u00a0Monolayer<\/b><\/strong>\u201d \u7684\u6587\u7ae0\u3002\u7814\u7a76\u4eba\u5458\u901a\u8fc7\u56e2\u961f\u6210\u5458\u81ea\u4e3b\u8bbe\u8ba1\u548c\u7814\u5236\u7684\u65e0\u6db2\u6c26\u4f4e\u6e29\u626b\u63cf\u96a7\u9053\u663e\u5fae\u955c\uff08\u6388\u6743\u56fd\u5bb6\u53d1\u660e\u4e13\u5229ZL201410091094.8\uff09\u7ed3\u5408\u53d8\u6e29\u5149\u5b66\u6d4b\u91cf\u63ed\u793a\u4e86\u751f\u957f\u5728\u70ed\u89e3\u77f3\u58a8\uff08HOPG\uff09\u4e0a\u7684\u5355\u5c42WSe<sub>2<\/sub>\u4e2d\u675f\u7f1a\u6fc0\u5b50\u7684\u70b9\u7f3a\u9677\u539f\u5b50\u548c\u7535\u5b50\u7ed3\u6784\u3002\u5728\u5176\u4ed6\u8fc7\u6e21\u91d1\u5c5e\u4e8c\u786b\u5c5e\u5143\u7d20\u6750\u6599\u4e2d\uff0c\u5176\u5b58\u5728\u7684\u7ed3\u6784\u7f3a\u9677\u6765\u81ea\u786b\u5c5e\u7a7a\u4f4d\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0cWSe<sub>2<\/sub>\u7684\u672c\u5f81\u70b9\u7f3a\u9677\u5219\u6765\u81ea\u4e8e\u5355\u4e2a\u94a8\u7a7a\u4f4d\uff0c\u5e76\u5f62\u6210\u4e86\u7a7a\u7a74\uff08p\u578b\uff09\u63ba\u6742\u3002\u6b64\u5916\uff0c\u8fd9\u4e9b\u7f3a\u9677\u5728\u5355\u5c42WSe<sub>2<\/sub>\u7684\u4f4e\u6e29\u6fc0\u5b50\u53d1\u5149\u8c31\u4e2d\u5360\u4e3b\u8981\u5730\u4f4d\u3002\u8fd9\u4e00\u5de5\u4f5c\u9996\u6b21\u4ece\u539f\u5b50\u7ea7\u522b\u63a2\u7a76\u7f3a\u9677\u6fc0\u5b50\u7684\u7ed3\u6784\uff0c\u5e76\u4e3a\u8fdb\u4e00\u6b65\u89e3\u91ca\u5148\u524d\u53d1\u73b0\u5728\u5355\u5c42WSe<sub>2<\/sub>\u4e2d\u5b58\u5728\u5355\u91cf\u5b50\u53d1\u5149\u70b9\u7684\u7f3a\u9677\u7ed3\u6784\u63d0\u4f9b\u4e86\u91cd\u8981\u542f\u793a\u3002<\/p>\n<p><strong><b>\u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/b><\/strong><\/p>\n<p><strong><b>\u56fe1 \u5355\u5c42WSe<\/b><\/strong><strong><sub><b>2<\/b><\/sub><\/strong><strong><b>\u7684STM\u56fe\u548c<\/b><\/strong><strong><em><b><i>dI\/dV\u66f2\u7ebf<\/i><\/b><\/em><\/strong><\/p>\n<p><a href=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/1-26.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-93861\" src=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/1-26.png\" alt=\"\" width=\"500\" height=\"389\" srcset=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/1-26.png 500w, \/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/1-26-300x233.png 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>\uff08a\uff09-\uff08b\uff09STM\u56fe\u50cf\u8868\u660e\u5355\u5c42WSe<sub>2<\/sub>\u4e2d\u5355\u4e2a\u70b9\u7f3a\u9677\u5728\u4e0d\u540c\u504f\u538b\uff08\u5206\u522b\u4e3a-2.5\u548c-1.5\u00a0V\uff09\u6761\u4ef6\u4e0b\u5177\u6709\u4e0d\u540c\u7684\u7279\u5f81\uff0c\u5751\u72b6\u548c\u4e09\u53f6\u8349\u72b6\u7ed3\u6784\u5206\u522b\u53cd\u6620\u4e86\u4e0d\u540c\u80fd\u91cf\u7684\u7535\u5b50\u6001\u5206\u5e03\uff0c<em><i>I<\/i><\/em><em><sub><i>set<\/i><\/sub><\/em>\u00a0=100 pA\uff1b<\/p>\n<p>\uff08c\uff09-\uff08d\uff09\u5206\u522b\u8868\u793a\u65e0\u7f3a\u9677\u5355\u5c42WSe<sub>2<\/sub>\uff08\u9ed1\u8272\u66f2\u7ebf\uff09\u4e0e\u70b9\u7f3a\u9677\u90e8\u4f4d\uff08\u7ea2\u8272\u66f2\u7ebf\uff09\u7684\u626b\u63cf\u96a7\u9053\u8c31<em><i>dI\/dV<\/i><\/em>\u7684\u7ebf\u6027\u548c\u5bf9\u6570\u66f2\u7ebf\u3002<em><i>V<\/i><\/em><em><sub><i>b<\/i><\/sub><\/em><em><sub><i>\u00a0<\/i><\/sub><\/em>= -2.5 V\uff0c<em><i>I<\/i><\/em><em><sub><i>set<\/i><\/sub><\/em><em><sub><i>\u00a0<\/i><\/sub><\/em>= 100 pA\u3002\u5728\u8d1f\u504f\u538b\u7684\u4ef7\u5e26\u8fb9\u7f18\u5206\u522b\u7528\u7bad\u5934\u6807\u8bb0\u3002<\/p>\n<p><strong><b>\u56fe2 <\/b><\/strong><strong><b>\u5355\u4e2a\u70b9\u7f3a\u9677\u7684\u539f\u5b50\u89e3\u6790STM\u56fe\u548c<\/b><\/strong><strong><b>\u626b\u63cf\u96a7\u9053<\/b><\/strong><strong><b>\u8c31<\/b><\/strong><\/p>\n<p><a href=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/2-27.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-93862\" src=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/2-27.png\" alt=\"\" width=\"500\" height=\"490\" srcset=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/2-27.png 500w, \/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/2-27-300x294.png 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>\uff08a\uff09-\uff08c\uff09\u8868\u793a\u4e09\u4e2a\u70b9\u7f3a\u9677\u5728\u4e0d\u540c\u504f\u538b\uff08\u5206\u522b\u4e3a-1.8\uff0c-1.2\u548c+ 1.5\u00a0V\uff09\u4e0b\u7684\u9ad8\u5206\u8fa8STM\u56fe\uff0c\u5f53\u504f\u538b\u8bbe\u7f6e\u5728\u534a\u5bfc\u4f53\u5e26\u9699\u5185\uff0c\u5355\u5c42WSe<sub>2<\/sub>\u4e2d\u6700\u5916\u5c42\u7684\u7852\u539f\u5b50\u8868\u73b0\u4e3a\u5355\u4e2a\u7a81\u8d77\uff0c\u5982\uff08b\uff09\u6240\u793a\uff0c\u70b9\u7f3a\u9677\u7684\u4e2d\u5fc3\u843d\u5728\u94a8\u539f\u5b50\u4f4d\u70b9\u4e0a\uff0c\u4fdd\u7559\u4e86\u5355\u5c42WSe<sub>2<\/sub>\u7684\u4e09\u91cd\u5bf9\u79f0\u6027\uff1b<\/p>\n<p>\uff08d\uff09\u6cbf\u7740\u6a2a\u622a\u56fe\uff08b\uff09\u4e2d\u7ecf\u8fc7\u70b9\u7f3a\u9677\u7684\u76f4\u7ebf\u65b9\u5411\u5bf9\u5e94\u7684<em><i>dI\/dV<\/i><\/em>\u66f2\u7ebf\u4e8c\u7ef4\u5f69\u8272\u56fe\uff1b<\/p>\n<p>\uff08e\uff09\u622a\u53d6\u56fe\uff08d\uff09\u4e2d\u7684\u90e8\u5206<em><i>dI\/dV<\/i><\/em>\u66f2\u7ebf\uff0c\u5bf9\u5e94\u7684\u4f4d\u7f6e\u5728\u56fe\uff08b\uff09\u4e2d\u7528\u5341\u5b57\u67b6\u6807\u8bb0\u3002\u4e3a\u4e86\u6e05\u695a\u8d77\u89c1\uff0c\u6240\u6709\u7684\u626b\u63cf\u96a7\u9053\u8c31\u66f2\u7ebf\u5747\u4f5c\u4e86\u5782\u76f4\u79fb\u52a8\u5904\u7406\u3002\u4f5c\u4e3a\u53c2\u6bd4\uff0c\u8fdc\u79bb\u7f3a\u9677\u90e8\u5206\u7684<em><i>dI\/dV<\/i><\/em>\u66f2\u7ebf\u7528\u9ed1\u8272\u66f2\u7ebf\u6240\u793a\u3002\u4ef7\u5e26\uff08\u8d1f\u504f\u538b\uff09\u9644\u8fd1\u7684\u5cf0\u503c\u504f\u79fb\u7531\u4e24\u6761\u5782\u76f4\u865a\u7ebf\u6807\u8bb0\uff0c\u5206\u522b\u4e3aP1\uff08-1.48\u00a0V\uff0c\u7ea2\u8272\uff09\u548cP2\uff08-1.61\u00a0V\uff0c\u9ed1\u8272\uff09\u3002<\/p>\n<p><strong><b>\u56fe3 <\/b><\/strong><strong><b>\u56db\u79cd\u7f3a\u9677\u7ed3\u6784\u7684\u539f\u5b50\u7ed3\u6784\u8ba1\u7b97\u548c\u76f8\u5e94\u7684\u5c40\u57df\u6001\u5bc6\u5ea6\uff08LDOS\uff09<\/b><\/strong><\/p>\n<p><a href=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/3-23.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-93863\" src=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/3-23.png\" alt=\"\" width=\"500\" height=\"186\" srcset=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/3-23.png 500w, \/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/3-23-300x112.png 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" 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<\/b><\/strong><strong><b>\u7531\u94a8\u7a7a\u4f4d\u7f3a\u9677\u5f15\u8d77\u7684<\/b><\/strong><strong><b>\u675f\u7f1a<\/b><\/strong><strong><b>\u6fc0\u5b50<\/b><\/strong><\/p>\n<p><a href=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/4-23.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-93864\" src=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/4-23.png\" alt=\"\" width=\"500\" height=\"443\" srcset=\"\/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/4-23.png 500w, \/\/m.iemloyee.com\/wp-content\/uploads\/2017\/07\/4-23-300x266.png 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" 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href=\"https:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.119.046101\" target=\"_blank\" rel=\"noopener noreferrer\"><u>Defect Structure of Localized Excitons in a WSe<\/u><u><sub>2<\/sub><\/u><u>\u00a0Monolayer<\/u><\/a><\/strong>\uff08Phys. Rev. Lett.\u00a02017, DOI: 10.1103\/PhysRevLett.119.046101\uff09<\/p>\n<p>\u672c\u6587\u7531\u6750\u6599\u4eba\u7f16\u8f91\u90e8<strong><b>\u7eb3\u7c73\u6750\u6599\u5b66\u672f\u7ec4<\/b><\/strong><strong><b>\u738b\u7545<\/b><\/strong><strong><b>\u4f9b\u7a3f\uff0c\u6750\u6599\u725b\u7f16\u8f91\u6574\u7406<\/b><\/strong>\u3002\u6b22\u8fce\u52a0\u5165\u6750\u6599\u4eba\u7f16\u8f91\u90e8\u7eb3\u7c73\u6750\u6599\u5b66\u672f\u4ea4\u6d41\u7fa4\uff08228686798\uff09\uff01<\/p>\n<p>\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<a 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