{"id":87692,"date":"2017-06-23T06:30:40","date_gmt":"2017-06-22T22:30:40","guid":{"rendered":"\/\/m.iemloyee.com\/?p=87692"},"modified":"2017-06-22T19:35:12","modified_gmt":"2017-06-22T11:35:12","slug":"%e9%87%8d%e7%a3%85%ef%bc%81nature-%e4%b8%ad%e5%9b%bd%e7%a7%91%e5%ad%a6%e5%ae%b6%e9%a6%96%e6%ac%a1%e8%a7%82%e6%b5%8b%e5%88%b0%e4%b8%89%e9%87%8d%e7%ae%80%e5%b9%b6%e8%b4%b9%e7%b1%b3%e5%ad%90","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=87692","title":{"rendered":"\u91cd\u78c5\uff01Nature: \u4e2d\u56fd\u79d1\u5b66\u5bb6\u9996\u6b21\u89c2\u6d4b\u5230\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50"},"content":{"rendered":"

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

\u5728\u91cf\u5b50\u573a\u7406\u8bba\u4e2d\uff0c\u6d1b\u4f26\u5179\u4e0d\u53d8\u6027\u5bfc\u81f4\u4e86\u4e09\u79cd\u7c7b\u578b\u7684\u8d39\u7c73\u5b50-\u72c4\u62c9\u514b\uff0c\u5a01\u5c14\u548c\u9a6c\u8428\u7eb3\u3002\u51b7\u51dd\u7269\u7cfb\u7edf\u4e2dDirac\u548cWeyl\u8d39\u7c73\u5b50\u7684\u5b58\u5728\u5df2\u88ab\u5b9e\u9a8c\u8bc1\u5b9e\u3002\u5728\u51b7\u51dd\u7269\u7cfb\u7edf\u4e2d\uff0c\u6676\u4f53\u4e2d\u7684\u8d39\u7c73\u5b50\u53d7\u5230\u6676\u4f53\u7a7a\u95f4\u7fa4\u7684\u5bf9\u79f0\u6027\u7684\u9650\u5236\uff0c\u800c\u4e0d\u662f\u6d1b\u4f26\u5179\u4e0d\u53d8\u6027\uff0c\u4ece\u800c\u5bfc\u81f4\u53d1\u73b0\u5176\u4ed6\u7c7b\u578b\u7684\u8d39\u7c73\u5b50\u6fc0\u53d1\u7684\u53ef\u80fd\u6027\uff0c\u9ad8\u80fd\u7269\u7406\u4e2d\u7684\u5bf9\u5e94\u7269\u3002\u7ee7\u201c\u62d3\u6251\u7edd\u7f18\u4f53\u201d\u3001\u201c\u91cf\u5b50\u53cd\u5e38\u970d\u5c14\u6548\u5e94\u201d\u3001\u201c\u5916\u5c14\u8d39\u7c73\u5b50\u201d\u4e4b\u540e\uff0c\u6700\u8fd1\u4e2d\u56fd\u79d1\u5b66\u9662\u7269\u7406\u7814\u7a76\u6240\/\u5317\u4eac\u51dd\u805a\u6001\u7269\u7406\u56fd\u5bb6\u5b9e\u9a8c\u5ba4\uff08\u7b79\uff09\u7684\u79d1\u7814\u56e2\u961f\u5728\u62d3\u6251\u7269\u6001\u7814\u7a76\u9886\u57df\u53c8\u53d6\u5f97\u4e86\u91cd\u5927\u7a81\u7834\uff0c\u9996\u6b21\u89c2\u6d4b\u5230\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\uff0c\u4e3a\u56fa\u4f53\u6750\u6599\u4e2d\u7535\u5b50\u62d3\u6251\u6001\u7814\u7a76\u5f00\u8f9f\u4e86\u65b0\u7684\u65b9\u5411\u3002\u8fd9\u4e00\u7814\u7a76\u6210\u679c\u4e8e2017\u5e746\u670819\u65e5\u5728\u7ebf\u53d1\u8868\u5728Nature\u4e0a\u3002\u672c\u6587\u4e2d\u4f7f\u7528\u89d2\u5206\u8fa8\u5149\u7535\u5b50\u80fd\u8c31\u6765\u8bc1\u660e\u5728\u7ed3\u6676\u78f7\u5316\u94bc\u7684\u7535\u5b50\u7ed3\u6784\u4e2d\u5b58\u5728\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\u3002\u8d85\u51fa\u5e38\u89c4\u7684\u72c4\u62c9\u514b-\u7ef4\u5c14-\u9a6c\u52d2\u90a3\u4e9a\u5206\u7c7b\uff0c\u5c06\u72c4\u62c9\u514b\u548c\u97e6\u5c14\u8d39\u7c73\u5b50\u5206\u522b\u5f52\u56e0\u4e8e\u56db\u548c\u4e8c\u6298\u9000\u5316\u70b9\u3002\u540c\u65f6\u89c2\u5bdf\u5230\u4e0e\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\u5171\u5b58\u7684\u6676\u4f53\u7684\u6563\u88c5\u7535\u5b50\u7ed3\u6784\u4e2d\u7684Weyl\u70b9\u5bf9\u3002\u8be5\u9879\u7814\u7a76\u4ece\u7406\u8bba\u9884\u8a00\u3001\u6837\u54c1\u5236\u5907\u3001\u5230\u5b9e\u9a8c\u89c2\u6d4b\u7684\u5168\u8fc7\u7a0b\uff0c\u90fd\u7531\u6211\u56fd\u79d1\u5b66\u5bb6\u72ec\u7acb\u5b8c\u6210\u3002\u8fd9\u79cd\u6750\u6599\u4ee3\u8868\u4e86\u7814\u7a76\u4e0d\u540c\u7c7b\u578b\u8d39\u7c73\u5b50\u4e4b\u95f4\u76f8\u4e92\u4f5c\u7528\u7684\u5e73\u53f0\u3002\u5b9e\u9a8c\u53d1\u73b0\u5f00\u8f9f\u4e86\u4e00\u79cd\u63a2\u7d22\u51b7\u51dd\u7269\u7cfb\u7edf\u4e2d\u975e\u5e38\u89c4\u8d39\u7c73\u5b50\u7684\u65b0\u7269\u7406\u5b66\u7684\u65b9\u6cd5\u3002<\/p>\n

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

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

\u56fe<\/strong>1\u00a0<\/strong>\u5e03\u91cc\u6e0a\u533a\u57df\u6cbf\u7740\u0393<\/strong>-A<\/strong>\u7ebf\u7684<\/strong>MoP<\/strong>\u7684\u6676\u4f53\u7ed3\u6784\u548c\u5e26\u7ed3\u6784<\/strong><\/p>\n

\"\"<\/p>\n

\uff08a\uff09Dirac\u548cWeyl\u8d39\u7c73\u5b50\u7684\u793a\u610f\u56fe\uff0c\u4ee5\u53ca\u65b0\u53d1\u73b0\u7684\u8d39\u7c73\u5b50\uff0c\u5b83\u4eec\u5177\u6709\u56db\u70b9\uff08\u72c4\u62c9\u514b\u70b9\uff0cDP\uff09\uff0c\u4e8c\u7ef4\uff08Weyl\u70b9\uff0cWP\uff09\u548c\u4e09\u500d\uff08\u4e09\u91cd\u9000\u5316\u70b9\uff0cTP\uff09\u9000\u5316\u7684\u5e26\u4ea4\u70b9\uff1b<\/p>\n

\uff08b\uff09MoP\u7684\u4e09\u7ef4\u6676\u4f53\u7ed3\u6784\u3002\u9ec4\u8272\u5e73\u9762\u8868\u793a\u955c\u9762Mz\uff1b<\/p>\n

\uff08c\uff09\u683c\u5b50\u7684\u9876\u89c6\u56fe\u663e\u793a\u76f8\u5bf9\u4e8e\u94bc\uff08\u68d5\u8272\u7403\u4f53\uff09\u6216\u78f7\u5316\u7269\uff08\u7eff\u8272\u7403\u4f53\uff09\u548c\u955c\u9762\uff08\u6c34\u5e73\u7ea2\u7ebf\uff09\u7684C3z\u65cb\u8f6c\u5bf9\u79f0\u6027\uff1b<\/p>\n

\uff08d\uff09\u4e09\u7ef4\u4f53\u79ef\u5e03\u91cc\u6e0a\u533a\uff08\u9ed1\u8272\uff09\u548c\u6295\u5f71\uff08001\uff09\u8868\u9762\u5e03\u91cc\u6e0a\u533a\uff08\u84dd\u8272\uff09\uff0c\u8868\u793a\u9ad8\u5bf9\u79f0\u70b9\uff1b<\/p>\n

\uff08e\uff0cf\uff09\u4e0d\u5177\u6709\uff08e\uff09\u548c\uff08f\uff09SOC\u7684\u6cbf\u7740\u0393-A\u7684\u8ba1\u7b97\u7684\u5e26\u7ed3\u6784\uff08\u76f8\u5bf9\u4e8e\u8d39\u7c73\u80fd\u91cfEF\u7684\u80fd\u91cfE\uff09\u3002\u4ea4\u53c9\u70b9\u7684\u5706\u5708\u8868\u793a\u4e09\u91cd\u9000\u5316\u70b9\u3002\u5177\u6709\u6df7\u5408\u989c\u8272\u7684\u66f2\u7ebf\u8868\u793a\u53cc\u91cd\u9000\u5316\u5e26\uff0c\u5177\u6709\u5747\u5300\u989c\u8272\u7684\u66f2\u7ebf\u8868\u793a\u975e\u7b80\u5e76\u5e26\u3002<\/p>\n

\u56fe<\/strong>2 <\/strong>\u4f53\u79ef\u7684\u4e09\u7ef4\u5e03\u91cc\u6e0a\u533a<\/strong>MoP<\/strong>\u7684\u6574\u4f53\u7535\u5b50\u7ed3\u6784<\/strong><\/p>\n

\"\"<\/p>\n

\uff08a\uff09\u6838\u5fc3\u7ea7\u5149\u7535\u5b50\u53d1\u5c04\u5149\u8c31\u663e\u793a\u7279\u5f81\u94bc\uff08Mo\uff093d\u548c\u78f7\uff08P\uff092p\u5cf0\u3002\u63d2\u56fe\u663e\u793a\u4e86MoP\u7684\u5178\u578b\u5355\u6676\uff1b<\/p>\n

\uff08b\uff0cc\uff09\u8ba1\u7b97\uff08b\uff09\u548c\u5b9e\u9a8c\uff08c\uff09EF\u5904\u7684\u5f3a\u5ea6\u56fe\uff0c\u663e\u793akx=0\u5e73\u9762\u4e2d\u7684\u8d39\u7c73\u9762\u3002\u7eff\u8272\u6846\u8868\u793akx=0\u5e73\u9762\u4e2d\u7684\u5e03\u91cc\u6e0a\u533a\u57df\u8fb9\u754c\uff1b<\/p>\n

\uff08d\uff0ce\uff09\u5b9e\u9a8c\uff08d\uff09\u548c\u8ba1\u7b97\uff08e\uff09EF\u5904\u7684\u5f3a\u5ea6\u56fe\uff0c\u663e\u793akz=0\u5e73\u9762\u4e2d\u7684\u8d39\u7c73\u9762\u3002\u767d\u8272\u516d\u8fb9\u5f62\u8868\u793akz = 0\u5e73\u9762\u4e2d\u7684\u5e03\u91cc\u6e0a\u533a\u57df\u8fb9\u754c\uff1b<\/p>\n

(f\uff0cg\uff09ARPES\uff08f\uff09\u548c\u66f2\u7387\u5f3a\u5ea6\uff08g\uff09\u66f2\u7ebf\uff0c\u663e\u793a\u6cbfK-\u0393-M\u7684\u5e26\u5206\u6563\u3002\u4e3a\u4e86\u6bd4\u8f83\uff0c\u6cbfk-\u0393-M\u7684\u8ba1\u7b97\u7684\u5e26\u7ed3\u6784\u53e0\u52a0\u5728\u5b9e\u9a8c\u6570\u636eg\u4e2d\uff1b<\/p>\n

\uff08h-k\uff09\u4e0ed-g\u76f8\u540c\uff0c\u4f46\u5728kz=\u03c0\u5e73\u9762\u3002\u8bb0\u5f55\u5728\uff08100\uff09\u88c2\u89e3\u9762\u4e0a\u7684c\u6570\u636e\u3002<\/p>\n

\u56fe<\/strong>3 TP1<\/strong>\u9644\u8fd1\u7684\u7535\u5b50\u7ed3\u6784<\/strong><\/p>\n

\"\"<\/p>\n

\uff08a-c\uff09ARP\uff08a\uff09\u548c\u66f2\u7387\uff08b\uff09\u5f3a\u5ea6\u56fe\u4ee5\u53ca\u6cbf\u7740C1\uff08j\u4e2d\u7684\u7eff\u7ebf\uff09\u7684\u8ba1\u7b97\u7684\u5e26\u7ed3\u6784\uff08c\uff09\u3002d-i\u4e0ea-c\u76f8\u540c\uff0c\u4f46\u6cbfC2\uff08d-f\uff09\u6216C3\uff08g-i\uff09 \uff08j\u4e2d\u7684\u84dd\u7ebf\uff09c\uff0cf\u548ci\u4e2d\u7684\u66f2\u7ebf\u5982\u56fe1d\uff0ce\uff1b<\/p>\n

\uff08j\uff09\u4f53\u79ef\u5e03\u91cc\u6e0a\u533a\u57df\u7684\u793a\u610f\u56fe\uff0c\u5305\u62ec\u7ebfC1\uff0cC2\u548cC3\uff0c\u5176\u5206\u522b\u8868\u793aa-c\uff0c d-f\u548cg-i\u4e2d\u5207\u53e3\u7684\u52a8\u91cf\u4f4d\u7f6e\uff1b<\/p>\n

\uff08k\uff09\u6cbf\u7740C1\uff0cC2\u548cC3\u7684\u5e26\u5206\u6563\u4f53\u7684\u4e09\u7ef4\u56fe\u3002\u7b26\u53f7\u8868\u793a\u901a\u8fc7\u8ddf\u8e2ab\uff0ce\u548ch\u4e2d\u7684\u66f2\u7387\u5f3a\u5ea6\u6570\u636e\u7684\u5cf0\u503c\u4f4d\u7f6e\u800c\u63d0\u53d6\u7684\u5e26\u5206\u6563\u3002C1\u7684\u6570\u636e\u8bb0\u5f55\u5728\uff08100\uff09\u5207\u5272\u9762\u4e0a\uff1bC2\u548cC3\u6570\u636e\u8bb0\u5f55\u5728\uff08001\uff09\u88c2\u89e3\u8868\u9762\u4e0a\u83b7\u5f97\u3002<\/p>\n

\u56fe<\/strong>4 Weyl<\/strong>\u70b9\u9644\u8fd1\u7684\u7535\u5b50\u7ed3\u6784<\/strong><\/p>\n

\"\"<\/p>\n

\uff08a\uff09\u4e09\u7ef4\u4f53\u79ef\u5e03\u91cc\u6e0a\u533a\u57df\u3002\u5728\u6ca1\u6709SOC\u7684kz=0\u955c\u9762\u4e2d\uff0c\u8282\u70b9\u7ebf\u662f\u660e\u663e\u7684\uff0c\u800cWeyl\u70b9\u51fa\u73b0\u5728\u5177\u6709SOC\u7684\u5e73\u9762\u4e0a\uff1b<\/p>\n

\uff08b\uff0cc\uff09\u5b9e\u9a8c\uff08b\uff09\u548c\u8ba1\u7b97\uff08c\uff09E-EF=-1.1eV\u7684\u5f3a\u5ea6\u56fe\u5728kz=0\u5e73\u9762\u3002b\u4e2d\u7684\u767d\u70b9\u8868\u793aWeyl\u70b9\u7684\u9884\u8ba1\u4f4d\u7f6e\uff1b<\/p>\n

\uff08d\uff0ce\uff09\u4e0eb\uff0cc\u76f8\u540c\uff0c\u4f46\u5728kz =\u03c0\u5e73\u9762\uff1b<\/p>\n

\uff08f\uff09\u5728KZ=-0.05\u03c0\u5904\uff0cWeyl\u70b9\uff08WP\uff1b\u5e95\u90e8\uff09\u9644\u8fd1\u7684ARPES\uff08\u9876\u90e8\uff09\u548c\u66f2\u7387\uff08\u4e2d\uff09\u5f3a\u5ea6\u56fe\u4ee5\u53ca\u80fd\u91cf\u5206\u5e03\u66f2\u7ebf\u9644\u8fd1\u3002\u84dd\u8272\u865a\u7ebf\uff08\u5e95\u90e8\uff09\u7a81\u51fa\u663e\u793a\u8272\u5e26\u5206\u6563\uff1b<\/p>\n

\uff08g-j\uff09\u4e0ef\u76f8\u540c\uff0c\u4f46\u5728kz=-0.02\u03c0\uff08g\uff09\uff0ckz=0\uff08h\uff09\uff0ckz=0.02\u03c0\uff08i\uff09\u548ckz =0.05\u03c0\uff08j\uff09\uff1b<\/p>\n

\uff08k-m\uff09\u6cbfkz=\u00b10.05\u03c0\uff08k\uff09\uff0ckz=\u00b10.02\u03c0\uff081\uff09\u548ckz=0\uff08m\uff09\u7684\u8ba1\u7b97\u7684\u5e26\u7ed3\u6784\uff1b<\/p>\n

\uff08n\uff09\u901a\u8fc7\u4e00\u5bf9Weyl\u70b9\uff08\u5177\u6709\u76f8\u53cd\u7684\u624b\u6027\u7535\u8377;\u7eff\u8272\u548c\u84dd\u8272\u7684\u5b9e\u5fc3\u5706\uff09\u6cbfkz\u8ba1\u7b97\u7684\u5e26\u7ed3\u6784\uff1b<\/p>\n

\uff08o\uff09\u901a\u8fc7\u4e00\u5bf9Weyl\u70b9\u6cbfkz\u7684\u80fd\u91cf\u5206\u5e03\u66f2\u7ebf\uff0c\u989c\u8272\u7f16\u7801\u4ee5\u5339\u914df-j\u5e95\u90e8\u9762\u677f\u4e2d\uff0co\u7684\u96f6\u80fd\u91cf\u8bbe\u5b9a\u4e3aWeyl\u70b9\u7684\u80fd\u91cf\u3002\u901a\u8fc7\u865a\u7ebf\u8fde\u63a5\u7684\u4e09\u89d2\u5f62\u7a81\u51fa\u663e\u793aWeyl\u70b9\u9644\u8fd1\u7684\u5e26\u5206\u6563\u3002\u6570\u636e\u8bb0\u5f55\u5728\uff08001\uff09\u5207\u5272\u9762\u4e0a\u3002<\/p>\n

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

\u8be5\u7814\u7a76\u56e2\u961f\u7684ARPES\u7ed3\u679c\u63d0\u4f9b\u4e86\u5728\u7ed3\u6676MoP\u7684\u7535\u5b50\u7ed3\u6784\u4e2d\u7684\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\u3002MoP\u4e2d\u7684\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\u7531\u65cb\u8f6c\u548c\u955c\u50cf\u5bf9\u79f0\u6027\u4fdd\u62a4\u3002\u5bf9\u79f0\u6027\u7684\u5206\u89e3\u53d6\u51b3\u4e8e\u5bf9\u79f0\u7834\u574f\u6270\u52a8\u7684\u6027\u8d28\uff0c\u5c06\u4e09\u6b21\u9000\u5316\u70b9\u5206\u89e3\u6210Weyl\u70b9\u6216\u8282\u70b9\u7ebf\u3002\u6700\u540e\uff0c\u4f4d\u4e8e\u4e0d\u540c\u65f6\u523b\u7684\u5171\u5b58\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\u548c\u97e6\u5c14\u8d39\u7c73\u5b50\u53ef\u4ee5\u901a\u8fc7\u7535\u5b50\u76f8\u4e92\u4f5c\u7528\u76f8\u4e92\u8054\u7cfb\uff0c\u7814\u7a76\u4e0d\u540c\u7c7b\u578b\u8d39\u7c73\u5b50\u4e4b\u95f4\u7684\u76f8\u4e92\u4f5c\u7528\u63d0\u4f9b\u4e00\u4e2a\u5e73\u53f0\u3002\u968f\u7740MoP\u4e2d\u53d1\u73b0\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\uff0c\u80fd\u591f\u8fdb\u4e00\u6b65\u8bc6\u522b\u78b3\u5316\u94a8\u7cfb\u5217\u4e2d\u7684\u62d3\u6251\u534a\u91d1\u5c5e\uff0c\u7814\u7a76\u4e0e\u65b0\u8d39\u7c73\u5b50\u6709\u5173\u7684\u4e0d\u5bfb\u5e38\u5c5e\u6027\u7684\u7406\u60f3\u6750\u6599\u3002\u9664\u4e86\u4e09\u91cd\u7b80\u5e76\u8d39\u7c73\u5b50\u4e4b\u5916\uff0c\u7406\u8bba\u9884\u6d4b\u4e86\u5927\u91cf\u7684\u6750\u6599\u53ef\u4ee5\u627f\u8f7d\u5176\u4ed6\u7c7b\u578b\u7684\u975e\u5e38\u89c4\u8d39\u7c73\u5b50\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1a<\/strong>Observation of three-componen fermions in the topological semimetal molybdenum phosphide<\/a>\uff08Nature, 2017, DOI: 10.1038\/nature22390\uff09<\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u7f16\u8f91\u90e8\u7eb3\u7c73\u6750\u6599\u5b66\u672f\u7ec4\u575a\u6bc5\u4f9b\u7a3f\uff0c\u6750\u6599\u725b\u7f16\u8f91\u6574\u7406<\/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

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