²é¿´: 1367  |  »Ø¸´: 2

yyÇïË®

½ð³æ (СÓÐÃûÆø)

[½»Á÷] ¼«ÐÔ°ë½ðÊô¼Ò×åÔöÌíгÉÔ±

¼«ÐÔ°ë½ðÊô¼Ò×åÔöÌíгÉÔ±
¡¡¡¡¼«ÐÔ°ë½ðÊô(Half-metal)ÊÇÖ¸Ö»ÓÐÒ»ÖÖ×ÔÐý·½ÏòµÄµç×Ó²ÎÓëµ¼µçµÄ²ÄÁÏ¡£×÷ΪÌú´Å½ðÊô»ò´ÅÐÔ°ëµ¼ÌåµÄÒ»ÖÖÌØÀý£¬¼«ÐÔ°ë½ðÊôµÄ×ÔÐý¼«»¯ÂÊΪ100%£¬ÊÇÒ»ÖÖÖØÒªµÄ×ÔÐýµç×Óѧ²ÄÁÏ¡£Ëü¿ÉÒÔÓÃÀ´Ïò°ëµ¼ÌåʵÏÖ¸ßЧÂʵÄ×ÔÐý×¢È룬ÓÐÖúÓÚʵÏÖ×ÔÐý³¡Ð§Ó¦¾§Ìå¹ÜÆ÷¼þ¡£¼«ÐÔ°ë½ðÊô»¹¿ÉÓÃÓÚÖÆ±¸´ÅÐÔËíµÀ½á£¬²¢ÓÐDZÁ¦ÊµÏÖ±ÈÏÖÓÐÆ÷¼þ¸ü¸ßµÄ¾Þ´Åµç×è¡£¼«ÐÔ°ë½ðÊôÓ볬µ¼ÌåÖ®¼äµÄ½üÁÚЧӦ»¹ÓпÉÄܲúÉú·Ç³£¹æµÄ³¬µ¼Ì¬¡£Òò´Ë£¬Ñ°ÕÒÐÔÄÜÓÅÒìµÄÐÂÐͼ«ÐÔ°ë½ðÊô²»½ö¶Ô»ù´¡Ñо¿ÓÐÍÆ¶¯×÷Ó㬻¹ÓпÉÄܲúÉúÐÂÐ͵ÄÐÅÏ¢¶ÁÈ¡¡¢´æÖüºÍ´¦Àí¼¼Êõ¡£¾¡¹ÜÀíÂÛÒѾ­Ô¤ÑÔÁ˲»ÉÙ¼«ÐÔ°ë½ðÊôµÄºòÑ¡²ÄÁÏ£¬µ«Í¨¹ýµçѧʵÑé»ñµÃÑéÖ¤µÄÖ»ÓÐCrO2, EuO, (Ga,Mn)AsµÈÇüÖ¸¿ÉÊýµÄ¼¸ÖÖ²ÄÁÏ¡£ÔÚÉÏÊö²ÄÁÏÖУ¬²ÎÓëµ¼µçµÄµç×Ó¾ßÓÐd»òp¹ìµÀµÄÌØÕ÷¡£Æù½ñΪֹ£¬ÉÐûÓÐsÄÜ´øµÄ¼«ÐÔ°ë½ðÊô±»ÊµÑéÈ·ÈÏ¡£
¡¡¡¡×÷ΪһÀà´ÅÐÔ¾øÔµÌå»ò´ÅÐÔ°ëµ¼Ì壬¼â¾§Ê¯½á¹¹µÄACr2X4¼Ò×å (A=Cd, Hg, Zn, X=Se, SµÈ)ÒÑÓÐÎåÊ®ÄêµÄÑо¿ÀúÊ·¡£Èý¼ÛµÄCrÀë×Ó¿Éͨ¹ý³¬½»»»×÷ÓòúÉúÌú´ÅÐò£¬Aλԭ×ÓµÄs¹ìµÀͨ¹ýs-d½»»»×÷Ó÷¢Éú½Ï´óµÄ×ÔÐýÅüÁÑ£¬Òò´ËnÐ͵ÄACr2X4²ÄÁÏÓпÉÄÜÊÇsÐ͵ļ«ÐÔ°ë½ðÊô²ÄÁÏ¡£2011Ä꣬Öйú¿ÆÑ§ÔºÎïÀíÑо¿Ëù/±±¾©Äý¾Û̬ÎïÀí¹ú¼ÒʵÑéÊÒ(³ï)µÄ·½ÖÒ-´÷Ï£Ñо¿×éͨ¹ýµÚÒ»ÐÔÔ­Àí¼ÆËã±íÃ÷nÐÍHgCr2Se4ÊÇÒ»ÖÖsÐͼ«ÐÔ°ë½ðÊô£¬ËûÃÇ»¹Ô¤ÑÔÀíÏ뻯ѧÅä±ÈµÄHgCr2Se4ÊÇ´ÅÐÔÍâ¶û°ë½ðÊô(Weyl semimetal)µÄÒ»ÖÖºòÑ¡²ÄÁÏ£¬ÆäÁ¿×ÓÚå½á¹¹ÓпÉÄܲúÉú¸ü¸ßζȵÄÁ¿×Ó·´³£»ô¶ûЧӦ¡¾G. Xu et al., Phys. Rev. Lett. 107, 186806 (2011)¡¿¡£
¡¡¡¡×î½ü£¬Öйú¿ÆÑ§ÔºÎïÀíÑо¿Ëù/±±¾©Äý¾Û̬ÎïÀí¹ú¼ÒʵÑéÊÒ£¨³ï£©ÄÉÃ×ÎïÀíÓëÆ÷¼þÖØµãʵÑéÊÒµÄÀîÓÀÇìÑо¿×é(N08×é)µÄ²©Ê¿Éú¹ØÍ¯Ó뼫¶ËÌõ¼þÎïÀíÖØµãʵÑéÊÒEX1×éµÄʯÓѹú¸±Ñо¿Ô±ºÍ³¬µ¼¹ú¼ÒÖØµãʵÑéÊÒSC8×éµÄÈδϸ±Ñо¿Ô±µÈºÏ×÷£¬Ï꾡µØÑо¿ÁËnÐÍHgCr2Se4µ¥¾§ÑùÆ·µÄ´ÅÐԺ͵ç×ÓÊäÔËÐÔÖÊ£¬²¢ÀûÓð²µÂÁзò(Andreev)·´Éä·½·¨²âÁ¿Á˵ç×Ó×ÔÐý¼«»¯ÂÊ¡£ÊµÑé·¢ÏÖn-HgCr2Se4´¦ÓÚÌú´Å»ù̬ʱ£¬Ã¿¸öCrÀë×ӵı¥ºÍ´Å¾ØÎª3¸ö²¨¶û´Å×Ó£¬ÓëÀíÂÛ¼ÆËãÏà·û¡£ÔÚ¾ÓÀïζÈ(~105.5 K)¸½½ü£¬½ðÊô-¾øÔµÌåÏà±äµ¼Ö¸ߴï8¸öÊýÁ¿¼¶µÄµç×è±ä»¯£¬²¢ÇÒÔÚÏà±äÇøÓнӽü5¸öÊýÁ¿¼¶µÄÅӴŵç×è¡£ËûÃÇ»¹ÖƱ¸ÁË´óÁ¿µÄPb/HgCr2Se4Æ½Ãæ½áÆ÷¼þ£¬Í¨¹ý²âÁ¿·¢ÏÖÆäÁãÆ«Ñ¹Î¢·Öµçµ¼Ôںܴó³Ì¶ÈÉϱ»ÒÖÖÆ¡£Í¨¹ýÓÃÐÞÕýµÄBlonder-Tinkham-Klapwijk (BTK)ÀíÂÛ¶Ô΢·Öµçµ¼Æ×½øÐÐÄâºÏ£¬µÃµ½Á˸ߴï97%µÄµç×Ó×ÔÐý¼«»¯ÂÊ£¬´Ó¶øÎªn-HgCr2Se4µÄ¼«ÐÔ°ë½ðÊôÐÔÌṩÁËÓÐÁ¦µÄʵÑéÖ¤¾Ý¡£ËûÃÇ»¹¹Û²ìµ½Pb/HgCr2Se4½áµÄÁãÆ«Ñ¹µçµ¼¾ßÓÐÃ÷ÏÔÆ«ÀëBTKÀíÂÛÔ¤ÆÚµÄÐÐΪ£¬²¢ÓëLöfwanderµÈ·¢Ìá³öµÄ×ÔÐý»îԾɢÉäÄ£ÐÍÏà·û¡£ÕâЩ½á¹û¶Ô̽Ë÷ÐÂÐÍ×ÔÐýµç×ÓѧÆ÷¼þºÍ½øÒ»²½Ñо¿´ÅÐÔ½ðÊôºÍ³¬µ¼ÌåµÄÏ໥×÷ÓÃÒ²ÐíÓÐÖØÒªÒâÒå¡£

ͼ½â£º(a)ÉÏͼΪ²âÁ¿n-HgCr2Se4µç×Ó×ÔÐý¼«»¯ÂʵÄPb/HgCr2Se4Æ½Ãæ°²µÂÁзò½áµÄÆ÷¼þʾÒâͼ¡£(b)Ò»¸öµäÐ͵ÄPb/HgCr2Se4Æ÷¼þµÄ΢·Öµçµ¼Æ×¡£(c)ÁíÒ»¸öÀàËÆÆ÷¼þÔÚ¹éÒ»»¯ºóµÄ΢·Öµçµ¼Æ×£¬¹éÒ»»¯²½ÖèʹÓÃÁ˦Ì0H=0.2 TµÄ´Å³¡À´ÆÆ»µPbµÄ³¬µ¼Ì¬¡£ÓйØÊ¹ÓÃBTKÀíÂÛÄâºÏ»ñµÃn-HgCr2Se4µç×Ó¼«»¯ÂʵÄϸ½Ú£¬Çë¼ûT. Guan et al., Phys. Rev. Lett. 115, 087002 (2015).
»Ø¸´´ËÂ¥

» ±¾Ìû¸½¼þ×ÊÔ´Áбí

  • »¶Ó­¼à¶½ºÍ·´À¡£ºÐ¡Ä¾³æ½öÌṩ½»Á÷ƽ̨£¬²»¶Ô¸ÃÄÚÈݸºÔð¡£
    ±¾ÄÚÈÝÓÉÓû§×ÔÖ÷·¢²¼£¬Èç¹ûÆäÄÚÈÝÉæ¼°µ½ÖªÊ¶²úȨÎÊÌ⣬ÆäÔðÈÎÔÚÓÚÓû§±¾ÈË£¬Èç¶Ô°æÈ¨ÓÐÒìÒ飬ÇëÁªÏµÓÊÏ䣺xiaomuchong@tal.com
  • ¸½¼þ 1 : HgCr2Se4.pdf
  • 2015-09-30 05:51:07, 635.99 K

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹ØÉ̼ÒÍÆ¼ö: (ÎÒÒ²ÒªÔÚÕâÀïÍÆ¹ã)

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

0.8

2Â¥2015-09-30 08:56:48
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

0.8

3Â¥2015-09-30 22:09:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ yyÇïË® µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 320Çóµ÷¼Á0856 +3 ²»ÏëÆðÃû×Ö112 2026-03-19 3/150 2026-03-19 22:53 by ѧԱ8dgXkO
[¿¼ÑÐ] 307Çóµ÷¼Á +9 ÀäóÏ123 2026-03-17 9/450 2026-03-19 22:44 by ѧԱ8dgXkO
[¿¼ÑÐ] 288Çóµ÷¼Á +15 ÓÚº£º£º£º£ 2026-03-19 15/750 2026-03-19 22:41 by ѧԱ8dgXkO
[¿¼ÑÐ] 0856µ÷¼Á£¬ÊÇѧУ¾ÍÈ¥ +6 sllhht 2026-03-19 7/350 2026-03-19 19:50 by ÖÆ¶ÈµÄ
[¿¼ÑÐ] 321Çóµ÷¼Á +8 ºÎÈó²É123 2026-03-18 10/500 2026-03-19 16:46 by ºÎÈó²É123
[¿¼ÑÐ] Çóµ÷¼Á +3 Mqqqqqq 2026-03-19 3/150 2026-03-19 14:11 by peike
[¿¼ÑÐ] Çóµ÷¼Á£¬Ò»Ö¾Ô¸:ÄϾ©º½¿Õº½Ìì´óѧ´óѧ £¬080500²ÄÁÏ¿ÆÑ§Ó빤³Ìѧ˶£¬×Ü·Ö289·Ö +3 @taotao 2026-03-19 3/150 2026-03-19 14:07 by peike
[¿¼ÑÐ] Ò»Ö¾Ô¸ Î÷±±´óѧ £¬070300»¯Ñ§Ñ§Ë¶£¬×Ü·Ö287£¬Ë«·ÇÒ»±¾£¬Çóµ÷¼Á¡£ +3 ³¿»èÏßÓëÐǺ£ 2026-03-19 3/150 2026-03-19 13:36 by houyaoxu
[¿¼ÑÐ] ²ÄÁÏ¿¼Ñе÷¼Á +3 xwt¡£ 2026-03-19 3/150 2026-03-19 11:22 by wãåÑôw
[¿¼ÑÐ] Ò»Ö¾Ô¸Ìì´ó²ÄÁÏÓ뻯¹¤£¨085600£©×Ü·Ö338 +5 ²Ì´óÃÀÅ® 2026-03-13 5/250 2026-03-19 10:44 by ÊÇСÁõѽ¡«
[¿¼ÑÐ] 26µ÷¼Á/²ÄÁÏ/Ó¢Ò»Êý¶þ/×Ü·Ö289/ÒѹýAÇøÏß +7 ²½´¨¿á×Ï123 2026-03-13 7/350 2026-03-18 17:12 by ¾¡Ë´Ò¢1
[¿¼ÑÐ] 295Çóµ÷¼Á +3 Ò»Ö¾Ô¸¾©Çø211 2026-03-18 5/250 2026-03-18 17:03 by zhaoqian0518
[¿¼ÑÐ] Ò»Ö¾Ô¸Î÷ÄϽ»´ó£¬Çóµ÷¼Á +4 ²Ä»¯ÖðÃÎÈË 2026-03-18 4/200 2026-03-18 14:22 by 007_lilei
[¿¼ÑÐ] 0854£¬¼ÆËã»úÀàÕÐÊÕµ÷¼Á +3 ºúÀ±ÌÀ·ÅÌÇ 2026-03-15 6/300 2026-03-18 12:09 by Éϰ¶Éϰ¶¡­¡­..
[¿¼ÑÐ] 334Çóµ÷¼Á +3 Ö¾´æ¸ßÔ¶ÒâÔÚ»úÐ 2026-03-16 3/150 2026-03-18 08:34 by lm4875102
[¿¼ÑÐ] 332Çóµ÷¼Á +6 Zz°æ 2026-03-13 6/300 2026-03-17 17:03 by ruiyingmiao
[¿¼ÑÐ] 070300»¯Ñ§Ñ§Ë¶Çóµ÷¼Á +6 Ì«Ïë½ø²½ÁË0608 2026-03-16 6/300 2026-03-16 16:13 by kykm678
[¿¼ÑÐ] ÖпÆÔº²ÄÁÏ273Çóµ÷¼Á +4 yzydy 2026-03-15 4/200 2026-03-16 15:59 by Gaodh_82
[¿¼ÑÐ] 297Ò»Ö¾Ô¸ÉϽ»085600Çóµ÷¼Á +5 Ö¸¼â°ËǧÀï 2026-03-14 5/250 2026-03-14 17:26 by a²»Ò×
[¿¼ÑÐ] ÕÐÊÕ0805£¨²ÄÁÏ£©µ÷¼Á +3 18595523086 2026-03-13 3/150 2026-03-14 00:33 by 123%¡¢
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û