{"id":170853,"date":"2019-03-28T06:30:18","date_gmt":"2019-03-27T22:30:18","guid":{"rendered":"\/\/m.iemloyee.com\/?p=170853"},"modified":"2019-04-26T14:26:01","modified_gmt":"2019-04-26T06:26:01","slug":"%e7%9b%98%e7%82%b9%e8%bf%91%e5%87%a0%e5%b9%b4%e5%9c%a8%e4%ba%8c%e7%bb%b4%e6%9d%90%e6%96%99%e4%b8%ad%e5%8f%91%e7%8e%b0%e7%9a%84%e9%93%81%e7%a3%81%e6%80%a7","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=170853","title":{"rendered":"\u76d8\u70b9\u8fd1\u51e0\u5e74\u5728\u4e8c\u7ef4\u6750\u6599\u4e2d\u53d1\u73b0\u7684\u94c1\u78c1\u6027"},"content":{"rendered":"

\u3010\u5f15\u8bed\u3011<\/strong><\/p>\n

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1.Cr<\/b><\/strong>2<\/b><\/sub><\/strong>Ge<\/b><\/strong>2<\/b><\/sub><\/strong>Te<\/b><\/strong>6<\/b><\/sub><\/strong>\u00a0<\/b><\/strong><\/p>\n

2017\u5e74\uff0c\u7f8e\u56fd\u52a0\u5dde\u5927\u5b66\u7684\u5f20\u7fd4\u9662\u58eb\u3001\u96f7\u5e72\u57ce\u9662\u58eb\u548cJing Xia\uff08\u5171\u540c\u901a\u8baf\u4f5c\u8005\uff09\u7b49\u4eba5<\/sup>\u901a\u8fc7\u78c1\u5149\u514b\u5c14\u6280\u672f\u63ed\u793a\u4e86Cr2<\/sub>Ge2<\/sub>Te6<\/sub>\u8584\u5c42\u6837\u54c1\u7684\u94c1\u78c1\u6027\u3002\u5982\u56fe1b-e\u6240\u793a\uff0c\u6e29\u5ea640K\u65f6\uff0c\u53ea\u6709\u539a\u5ea6\u5927\u4e8e3\u5c42\u7684\u6837\u54c1\u624d\u8868\u73b0\u51fa\u660e\u663e\u7684\u94c1\u78c1\u4fe1\u53f7\uff0c\u957f\u6761\u72b6\u7684\u53cc\u5c42\u6837\u54c1\u533a\u57df\u5f88\u96be\u68c0\u6d4b\u51fa\u4fe1\u53f7\u3002\u968f\u7740\u6e29\u5ea6\u7684\u964d\u4f4e\uff0c\u53cc\u5c42\u6837\u54c1\u7684\u94c1\u78c1\u4fe1\u53f7\u9010\u6e10\u589e\u5f3a\uff0c\u5f53\u8fbe\u5230\u6db2\u6c26\u6e29\u5ea6\u65f6\uff0c\u6837\u54c1\u4fe1\u53f7\u4e0e\u886c\u5e95\u53ef\u4ee5\u8f7b\u6613\u5206\u8fa8\u5f00\u3002\u78c1\u5149\u514b\u5c14\u6d4b\u8bd5\u7684\u7ed3\u679c\u8868\u660eCr2<\/sub>Ge2<\/sub>Te6<\/sub>\u7684\u94c1\u78c1\u8f6c\u53d8\u6e29\u5ea6\u968f\u7740\u539a\u5ea6\u7684\u51cf\u8584\u800c\u964d\u4f4e\uff0c\u5757\u6750\u6837\u54c1\u7684Tc\u4e3a~68K,\u800c\u53cc\u5c42\u6837\u54c1Tc<\/sub>\u4ec5\u4e3a~30K\u3002\u53e6\u5916\uff0c\u4ed6\u4eec\u8fd8\u53d1\u73b0\u65bd\u52a0\u4e00\u4e2a\u5c0f\u4e8e0.3T\u7684\u78c1\u573a\u5373\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u8f6c\u53d8\u6e29\u5ea6\u7684\u8c03\u63a7\u3002\u8fd9\u4e0e\u4e09\u7ef4\u4f53\u7cfb\u6750\u6599\u8f6c\u53d8\u6e29\u5ea6\u5bf9\u78c1\u573a\u7684\u4e0d\u654f\u611f\u6027\u5f62\u6210\u9c9c\u660e\u7684\u5bf9\u6bd4\u3002\u540c\u65f6\uff0c\u65bd\u52a0\u975e\u5e38\u5c0f\u7684\u78c1\u573a\u5c06\u4f1a\u5bfc\u81f4\u66f4\u5927\u7684\u6709\u6548\u78c1\u6676\u5404\u5411\u5f02\u6027\uff0c\u6253\u5f00\u66f4\u5927\u7684\u81ea\u65cb\u6ce2\u6fc0\u53d1\u95f4\u9699\u3002\u5229\u7528\u5f52\u4e00\u5316\u7684\u81ea\u65cb\u6ce2\u7406\u8bba\u5bf9\u6240\u89c2\u5bdf\u5230\u7684\u73b0\u8c61\u8fdb\u884c\u5206\u6790\uff0c\u7814\u7a76\u8005\u63a8\u65ad\u5728\u4e8c\u7ef4\u94c1\u78c1\u5206\u5b50\u6676\u4f53\u4e2d\uff0c\u8f6c\u53d8\u6e29\u5ea6\u4e0e\u78c1\u573a\u95f4\u7684\u5173\u7cfb\u662f\u5176\u672c\u5f81\u7279\u6027\u9020\u6210\u7684\u3002Cr2<\/sub>Ge2<\/sub>Te6<\/sub>\u2014\u4e00\u79cd\u8fd1\u4e8e\u7406\u60f3\u7684\u4e8c\u7ef4Heisenberg\u94c1\u78c1\u4f53\u2014\u5bf9\u7814\u7a76\u81ea\u65cb\u884c\u4e3a\uff0c\u6253\u5f00\u65b0\u7684\u7814\u7a76\u9886\u57df\uff0c\u5982\u9ad8\u96c6\u6210\u81ea\u65cb\u7535\u5b50\u8bbe\u5907\u6709\u7740\u5f88\u5927\u7684\u610f\u4e49\u3002<\/p>\n

\u56fe 1\u00a0\u53cc\u5c42Cr2<\/sub>Ge2Te6<\/sub>\u7684\u94c1\u78c1\u6027\u3002<\/strong><\/p>\n

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2.Fe<\/b><\/strong>3<\/b><\/sub><\/strong>GeTe<\/b><\/strong>2<\/b><\/sub><\/strong><\/p>\n

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\u56fe 2\u00a0\u00a0\u539f\u5b50\u7ea7\u522b\u539a\u5ea6Fe3<\/sub>GeTe2<\/sub>\u7684\u5236\u5907\u4e0e\u8868\u5f81\u3002<\/strong><\/p>\n

\"\"<\/p>\n

a\u3001\u501f\u52a9Al2<\/sub>O3<\/sub>\u8584\u819c\u7684\u673a\u68b0\u73bb\u7483\u6cd5\u3002b\u3001\u5355\u5c42Fe3<\/sub>GeTe2<\/sub>\u7684\u539f\u5b50\u7ed3\u6784\u793a\u610f\u56fe\u3002c\u3001\u5c11\u5c42\u6837\u54c1\u7684\u5149\u5b66\u663e\u5fae\u955c\u7167\u7247\uff0cAl2<\/sub>O3<\/sub>\u8584\u819c\u9694\u5728\u6837\u54c1\u548c\u886c\u5e95\u4e4b\u95f4\u3002d\u3001\u5355\u5c42\uff0c\u53cc\u5c42\u548c\u4e09\u5c42\u6837\u54c1\u7684\u539f\u5b50\u529b\u663e\u5fae\u955c\u5f62\u8c8c\u56fe\uff0c\u626b\u63cf\u533a\u57df\u4e3ae\u4e2d\u6240\u793a\u7684\u65b9\u6846\u3002e\u3001\u53f0\u9636\u9ad8\u5ea6\u663e\u793a\u5355\u5c42\u539a\u5ea6\u4e3a0.8nm\u3002f\u3001\u4e0d\u540c\u539a\u5ea6\u6837\u54c1\u7684\u5f52\u4e00\u5316\u7535\u963b\u968f\u6e29\u5ea6\u7684\u53d8\u5316\u8d8b\u52bf\u3002<\/p>\n

\u6750\u6599\u7684\u78c1\u6027\u662f\u901a\u8fc7\u65bd\u52a0\u4e00\u4e2a\u5782\u76f4\u4e8e\u6837\u54c1\u5e73\u9762\u7684\u5916\u78c1\u573a\u6d4b\u8bd5\u970d\u5c14\u7535\u963bRxy<\/sub>\u5f97\u5230\u7684\u3002\u970d\u5c14\u7535\u963b(Rxy<\/sub>)\u53ef\u4ee5\u5206\u4e3a\u6b63\u5e38\u970d\u5c14\u7535\u963b(RNH<\/sub>)\u548c\u53cd\u5e38\u970d\u5c14\u7535\u963b(RAH<\/sub>)\u4e24\u90e8\u5206,\u5373Rxy<\/sub>= RNH<\/sub>+ RAH<\/sub>\u3002\u7531\u4e8e\u6b63\u5e38\u970d\u5c14\u7535\u963bRNH<\/sub>=R0<\/sub>\u03bc0<\/sub>H\u5bfc\u81f4Rxy<\/sub>\u4e0d\u5bf9\u79f0\u7684\uff0c\u5c06\u6b63\u5411\u548c\u53cd\u5411\u78c1\u573a\u4e0b\u6d4b\u5f97\u7684Rxy<\/sub>\u76f8\u52a0\u5373\u53ef\u5f97\u5230\u53cd\u5e38\u970d\u5c14\u7535\u963bRAH<\/sub>=RS<\/sub>M\uff0c\u56e0\u6b64\u53ef\u4ee5\u8ba1\u7b97\u51fa\u6750\u6599\u7684\u6781\u5316\u5f3a\u5ea6\u3002\u5c3d\u7ba1\u968f\u7740\u8584\u819c\u539a\u5ea6\u7684\u51cf\u8584\u7edd\u7f18\u6027\u589e\u5f3a\uff08\u56fe 2f\uff09\uff0c\u4f46\u4ece\u56fe 3a\u970d\u5c14\u7535\u963b\u7684\u6d4b\u8bd5\u7ed3\u679c\u770bFe3<\/sub>GeTe2<\/sub>\u5728\u5355\u5c42\u539a\u5ea6\u65f6\u4ecd\u7136\u7ef4\u6301\u5176\u94c1\u78c1\u6027\u3002\u901a\u8fc7\u7cfb\u7edf\u7684\u970d\u5c14\u7535\u963b\u6d4b\u8bd5\u53ef\u4ee5\u83b7\u5f97\u6750\u6599\u539a\u5ea6\u4e0e\u8f6c\u53d8\u6e29\u5ea6\u7684\u53d8\u5316\u5173\u7cfb\uff08\u56fe 3c\uff0cd\uff09\uff0c\u7ed3\u679c\u5448\u73b0\u660e\u663e\u7684\u539a\u5ea6\u6548\u5e94\uff0c\u968f\u7740\u8584\u819c\u539a\u5ea6\u7684\u51cf\u8584\uff0c\u8f6c\u53d8\u6e29\u5ea6\u6025\u5267\u4e0b\u964d\uff0c\u5355\u5c42\u6837\u54c1\u7684Tc<\/sub>\u53ea\u670915K\u5de6\u53f3\uff08RMCD\u6d4b\u8bd5\u7ed3\u679cTc<\/sub>\u53ef\u8fbe68K\uff09\u3002\u4e3a\u6b64\uff0c\u6587\u7ae0\u4f5c\u8005\u901a\u8fc7\u63ba\u6742\u7684\u624b\u6bb5\u5c06\u6837\u54c1\u7684Tc<\/sub>\u63d0\u9ad8\u3002\u56fe 4d\u663e\u793a\u4e86\u4e09\u5c42Fe3<\/sub>GeTe2<\/sub>\u6837\u54c1\u7684\u8f6c\u53d8\u6e29\u5ea6\u4e0e\u95e8\u7535\u538b\u7684\u5173\u7cfb\uff0c\u5728\u65bd\u52a0\u4e00\u4e2a\u6b63\u7535\u538b\u540e\u6837\u54c1\u7684Tc<\/sub>\u53ef\u4ee5\u8fbe\u5230\u5ba4\u6e29\u6c34\u5e73\uff0c\u5e76\u4e14Tc<\/sub>\u5173\u4e8e\u95e8\u7535\u538b\u8c03\u63a7\u51fa\u73b0\u7684\u4e24\u4e2a\u5cf0\u4f4d\u5bf9\u5e94\u6837\u54c1\u7535\u5bfc\uff08\u56fe 4a\uff09\u53d8\u5316\u7684\u5cf0\u4f4d\uff0c\u8bf4\u660e\u6837\u54c1\u7684\u7535\u5b50\u7ed3\u6784\u5728\u6805\u538b\u8c03\u63a7\u65f6\u53d1\u751f\u4e86\u53d8\u5316\u3002<\/p>\n

\u56fe 3\u00a0\u00a0Fe3<\/sub>GeTe2<\/sub>\u7684\u94c1\u78c1\u6027\u3002<\/strong><\/p>\n

\"\"<\/p>\n

\u4e0d\u540c\u539a\u5ea6\u7684Fe3<\/sub>GeTe2<\/sub>\u6837\u54c1\u5728\u4f4e\u6e29\uff08a\uff09\u548c100k\uff08b\uff09\u65f6\uff0cRxy\u4e0e\u5916\u78c1\u573a\u7684\u5173\u7cfb\u3002\u57281.5k\u65f6\uff0c\u5355\u5c42\u6837\u54c1\u4e2d\u53ef\u4ee5\u89c2\u6d4b\u5230\u94c1\u78c1\u56de\u7ebf\uff0c\u8bc1\u660e\u5176\u94c1\u78c1\u6027\u7684\u5b58\u5728\u3002\u5728100k\u65f6\uff0c\u53ea\u6709\u5728\u539a\u5ea6\u5927\u4e8e3\u5c42\u7684\u6837\u54c1\u4e2d\u5b58\u5728\u94c1\u78c1\u56de\u7ebf\u3002c\u3001\u4e0d\u540c\u539a\u5ea6Fe3<\/sub>GeTe2<\/sub>\u7684\u5269\u4f59\u53cd\u5e38\u970d\u5c14\u7535\u963b\u4e0e\u6e29\u5ea6\u7684\u5173\u7cfb\u3002\u7bad\u5934\u6807\u6ce8\u51fa\u5bf9\u5e94\u539a\u5ea6\u6837\u54c1\u7684Tc\u3002d\u3001Fe3<\/sub>GeTe2<\/sub>\u5173\u4e8e\u539a\u5ea6\u548c\u6e29\u5ea6\u7684\u76f8\u56fe\u3002<\/p>\n

\u56fe 4\u00a0\u901a\u8fc7\u79bb\u5b50\u95e8\u7535\u538b\u8c03\u8282Fe3<\/sub>GeTe2<\/sub>\u7eb3\u7c73\u7247\u7684\u94c1\u78c1\u6027\u3002<\/strong><\/p>\n

\"\"<\/p>\n

a\u3001\u5728\u4e09\u5c42Fe3<\/sub>GeTe2<\/sub>\u6837\u54c1\u4e2d\u83b7\u5f97\u7684\u7535\u5bfc\u4e0e\u95e8\u7535\u538b\u7684\u5173\u7cfb\u3002\u6d4b\u8bd5\u6e29\u5ea6\u4e3a330K\u3002\u63d2\u56fe\u4e3a\u5668\u4ef6\u7ed3\u6784\u793a\u610f\u56fe\uff0c\u5176\u4e2dS,D\u5206\u522b\u4ee3\u8868\u6e90\u7535\u6781\u548c\u6f0f\u7535\u6781\u3002Vn<\/sub>\u8868\u793a\u63a2\u6d4b\u7535\u538b\u3002\u56fa\u6001\u6805\u6781\u8986\u76d6\u4e86\u6837\u54c1\u548c\u5468\u56f4\u7535\u6781\uff0c\u56fa\u6001\u7535\u6781\u662fLiClO4<\/sub>\u6eb6\u89e3\u5728\u805a\u73af\u6c27\u4e59\u7094\u4e2d\u3002\u5bf9\u5e94\u4e0d\u540c\u5e94\u6805\u6781\u60c5\u51b5\u4e0b\uff0cRxy\u968f\u5916\u78c1\u573a\u7684\u53d8\u5316\u5173\u7cfb\uff08b\u300110K\uff1bc\u3001240K\uff09\u3002d\u3001\u4e09\u5c42Fe3<\/sub>GeTe2<\/sub>\u6837\u54c1\u5728\u4e0d\u540c\u6e29\u5ea6\u548c\u6805\u6781\u7535\u538b\u4e0b\u5bf9\u5e94\u7684\u76f8\u56fe\uff0c\u5176\u4e2d\u94c1\u78c1-\u987a\u7545\u8f6c\u53d8\u6e29\u5ea6\u662f\u901a\u8fc7\u53cd\u5e38\u970d\u5c14\u7535\u963b\u6d4b\u8bd5\u83b7\u5f97\u7684\u3002e\u300110K\u6761\u4ef6\u4e0b\u6837\u54c1\u77eb\u987d\u573a\u968f\u6805\u538b\u7684\u53d8\u5316\u8d8b\u52bf\u3002<\/p>\n

3.CrI<\/b><\/strong>3<\/b><\/sub><\/strong><\/p>\n

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\u56fe 5\u00a0<\/strong><\/p>\n

\"\"<\/p>\n

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\u53c2\u8003\u6587\u732e\uff1a<\/strong><\/p>\n

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5 Gong, C.\u00a0et al.<\/i><\/em>\u00a0Discovery of intrinsic ferromagnetism in two-dimensional van der Waals crystals. Nature<\/i><\/em>\u00a0546<\/b><\/strong>, 265, doi:10.1038\/nature22060 (2017).<\/p>\n

6 Deng, Y.\u00a0et al.<\/i><\/em>\u00a0Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2. Nature<\/i><\/em>\u00a0563<\/b><\/strong>, 94-99, doi:10.1038\/s41586-018-0626-9 (2018).<\/p>\n

7 Huang, B.\u00a0et al.<\/i><\/em>\u00a0Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit. Nature<\/i><\/em>\u00a0546<\/b><\/strong>, 270, doi:10.1038\/nature22391 (2017).<\/p>\n

8 Mak, K. F., Lee, C., Hone, J., Shan, J. & Heinz, T. F. Atomically Thin MoS2<\/sub>: A New Direct-Gap Semiconductor. Physical Review Letters<\/i><\/em>\u00a0105<\/b><\/strong>, 136805, doi:10.1103\/PhysRevLett.105.136805 (2010).<\/p>\n

9 Li, L.\u00a0et al.<\/i><\/em>\u00a0Black phosphorus field-effect transistors. Nature Nanotechnology<\/i><\/em>\u00a09<\/b><\/strong>, 372, doi:10.1038\/nnano.2014.35 (2014).<\/p>\n

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11 Zeng, H.\u00a0et al.<\/i><\/em>\u00a0Low-frequency Raman modes and electronic excitations in atomically thin MoS2<\/sub>\u00a0films. Physical Review B<\/i><\/em>\u00a086<\/b><\/strong>, 241301, doi:10.1103\/PhysRevB.86.241301 (2012).<\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u79d1\u6280\u987e\u95ee WSY\u00a0<\/strong>\u4f9b\u7a3f\uff0c<\/b><\/strong>\u6750\u6599\u4eba\u7f16\u8f91\u90e8Alisa\u7f16\u8f91\u3002<\/p>\n

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