²é¿´: 4376  |  »Ø¸´: 28
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

hello_Jzz

Òø³æ (СÓÐÃûÆø)


[½»Á÷] ΪʲôÔÚµÍΡ¢Ç¿´Å³¡Ï£¬°ëµ¼ÌåÖеĵç×ÓÖ»ÄÜÑØ×űßÔµÔ˶¯£¿

At low temperature and high magnetic field, electrons travel only along the edge of the
semiconductor¡£½ñÌì¿´ÎÄÏס¶The quantum spin Hall effect and topological insulators¡·ÊÇ¿´µ½µÄ£¬ÇëÎÊÕâÊÇÎªÊ²Ã´ÄØ£¿
ÕâÊDz»ÊǾÍÊÇedge stateµÄ³ö´¦°¡
»Ø¸´´ËÂ¥

» ÊÕ¼±¾ÌûµÄÌÔÌûר¼­ÍƼö

ÍØÆË²ÄÁÏ

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

» ÇÀ½ð±ÒÀ²£¡»ØÌû¾Í¿ÉÒԵõ½:

²é¿´È«²¿É¢½ðÌù

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

wzhiqustc

½ð³æ (СÓÐÃûÆø)


¡ï
hello_Jzz(½ð±Ò+1): лл²ÎÓë
ÒýÓûØÌû:
8Â¥: Originally posted by hello_Jzz at 2013-04-17 15:52:12
ÎÒµÄÎÊÌâÊÇÁ¿×Ó»ô¶ûЧӦ£¬»ô¶ûЧӦÎÒ¶®µÄ¡£
ÎÒÊDZ±´ó²©Ê¿£¬¸ÕºÍͬѧÌÖÂÛÁËһϣ¬ÊÇÒòΪ£ºµÍÎÂÊÇΪÁ˽µµÍµç×ÓµÄ×ÔÓɳ̣¬´Ó¶øÊ¹µç×ÓÔÚÇ¿´Å³¡ÏµÄÔ²ÖÜÔ˶¯Äܾ¡¿ÉÄܵÄС·¶Î§£¬ÕâÑù£¬ÔÚbulkÖУ¬µçÁ÷¾ÍµÖÏûÁË£¬¶ø±ßÔµ´¦ ...

Õâ¸öµØ·½ÓиöÃ÷ÏԵĴíÎ󣬵ÍÎÂÒ»°ãÔö¼Óµç×ÓµÄ×ÔÓɳ̣¬¶ø²»ÊǼõС¡«

¿´¼ûÁËÂÔΪ»Ø´ðÒ»¶þ£º
1. ¡°ÕâÑù£¬ÔÚbulkÖУ¬µçÁ÷¾ÍµÖÏûÁË£¬¶ø±ßÔµ´¦¾Í»á³öÏÖÊ£ÓàµçÁ÷¡±£¬ÄãÃèÊöµÄÊǾ­µäµÄ»ô¶ûЧӦ£¬²»ÊÇÁ¿×ӵġ£ÕâÖÖ¾­µäµÄ½âÊÍÒ²Ðí¿ÉÒÔ°ïÖúÄãÓиöͼÏñ£¬µ«¸öÈËÈÏΪ£¬ÖÕ¾¿²»ÊʺÏÓÃÀ´Àí½âÁ¿×Ó»ô¶ûЧӦ¡£Á¿×Ó»ô¶ûЧӦֻÄÜÔÚÁ¿×ÓÁ¦Ñ§µÄ¿ò¼ÜϽâÊÍ¡£

2. Ò»°ãÓÐÏÞµÄÌåϵ¶¼¿ÉÄÜÓÐedge state,Ö»²»¹ýÒ»°ãÌåϵµÄedge state¶ÔÌåϵµÄÐÔÖÊÓ°Ïì²»´ó£¬ËùÒÔ²»´óÌÖÂÛÕâ¸ö̬¡£µ«ÊÇtopological insulator (including QHE to my understanding)ÖÐedge stateºÜÌØ±ð¡£Ìå̬ÊǾøÔµµÄ£¬±ßԵ̬Êǵ¼µçµÄ¡£¿ÉÒÔЯ´øedge current, either spin or charge current.

3. QHEµÄ³öÏÖ½öµ±µç×ÓÔڴų¡ÖеÄcyclotron radius ԶСÓÚµç×ÓµÄ×ÔÓɳ̵ÄÇé¿öϲųöÏÖ¡£´ÖÂÔµÄ˵electron must have already executed many cyclotron periods before it is scattered by other electrons/phonons/defects. ÕâÑù²ÅÄܱ£Ö¤´Å³¡ÖеÄÁ¿×ÓЧӦ²»±»Ä¨µô¡£So you need a high magnetic field, which means much smaller cyclotron radius/magnetic length. Also you need a low temperature to decrease the effect of scattering, which will increase the mean free path.

4. ÓÉÓÚÌå̬ÊǾøÔµÌ¬£¬bulkÖв»´æÔÚµçÁ÷£¬Ò²¾Í̸²»ÉϵçÁ÷µÄµÖÏû¡£
17Â¥2013-04-18 10:03:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 29 ¸ö»Ø´ð

ÂäÈÕÕÕÇï²Ý

ľ³æ (ÕýʽдÊÖ)


¡ï
hello_Jzz(½ð±Ò+1): лл²ÎÓë
ʲô½ÐÁ¿×Ó×ÔÐý»ô¶ûЧӦ£¿
2Â¥2013-04-17 00:03:59
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
¡ï
hello_Jzz(½ð±Ò+1): лл²ÎÓë
°Ù¶Èһϡ°»ô¶ûЧӦ¡±¼´¿É
¿´Ò»Ï ´óѧÎïÀí Ò²ÐÐ
3Â¥2013-04-17 02:44:53
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hello_Jzz

Òø³æ (СÓÐÃûÆø)


???????:
3?: Originally posted by ????730 at 2013-04-17 02:44:53
???????????§¹???????
????? ??????? ???

??????????????????????????
??????????????????????????????????????????????????§Ö???????????bulk?§Ö??????????§»?????¡¤??????????????
??????????????bulk???????§Ö???????????????????????? electrons travel only along the edge of the semiconductor??????????????????????
?ú‘????????????????????
4Â¥2013-04-17 14:18:39
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 304Çóµ÷¼Á +5 ËØÄê¼ÀÓï 2026-03-15 5/250 2026-03-16 17:00 by ÎҵĴ¬Îҵĺ£
[¿¼ÑÐ] Ò»Ö¾Ô¸ËÕÖÝ´óѧ²ÄÁϹ¤³Ì£¨085601£©×¨Ë¶ÓпÆÑо­ÀúÈýÏî¹ú½±Á½¸öʵÓÃÐÍרÀûÒ»ÏîÊ¡¼¶Á¢Ïî +3 ´ó»ðɽС»ðɽ 2026-03-16 5/250 2026-03-16 16:54 by barlinike
[¿¼ÑÐ] Ò»Ö¾Ô¸211 0703·½Ïò310·ÖÇóµ÷¼Á +3 ŬÁ¦·Ü¶·112 2026-03-15 3/150 2026-03-16 16:44 by houyaoxu
[½Ìʦ֮¼Ò] ½¹ÂÇ +7 Ë®±ùÔÂÔÂÒ°Íà 2026-03-13 9/450 2026-03-16 10:00 by Quakerbird
[¿¼ÑÐ] 326Çóµ÷¼Á +4 Éϰ¶µÄСÆÏ 2026-03-15 5/250 2026-03-16 08:39 by Linda Hu
[¿¼ÑÐ] 289Çóµ÷¼Á +4 ÕâôÃû×ÖÕ¦Ñù 2026-03-14 6/300 2026-03-14 18:58 by userper
[¿¼ÑÐ] 290Çóµ÷¼Á +4 @½«¾Í½«¾Í¿´ 2026-03-10 8/400 2026-03-14 14:23 by ǧǧÔËÆø
[¿¼ÑÐ] 327Çóµ÷¼Á +4 Ffff03 2026-03-10 4/200 2026-03-14 00:17 by JourneyLucky
[¿¼ÑÐ] 341Çóµ÷¼Á +4 ·¬ÇÑÍ·--- 2026-03-10 4/200 2026-03-13 23:12 by JourneyLucky
[¿¼ÑÐ] 0703»¯Ñ§Ò»Ö¾Ô¸211 ×Ü·Ö320Çóµ÷¼Á +5 Â꿨°Í¿¨°¡¹þ 2026-03-11 5/250 2026-03-13 21:40 by JourneyLucky
[¿¼ÑÐ] 307Çóµ÷¼Á +5 ³¬¼¶ÒÁ°º´óÍõ 2026-03-12 5/250 2026-03-13 15:56 by °ô°ôÇòÊÖ
[¿¼ÑÐ] ¹¤¿Æ²ÄÁÏ085601 279Çóµ÷¼Á +8 À§ÓÚÐdz¿ 2026-03-12 10/500 2026-03-13 15:42 by ms629
[¿¼ÑÐ] 290Çóµ÷¼Á +7 ADT 2026-03-12 7/350 2026-03-13 15:17 by JourneyLucky
[¿¼ÑÐ] ÍÁľµÚÒ»Ö¾Ô¸276Çóµ÷¼Á£¬¿ÆÑкͼ¼ÄÜÊ®·Ö·á¸»£¬ÇóÐÂÐË·½ÏòµÄµ¼Ê¦ÊÕÁô +3 ÍÁľСÌì²Å 2026-03-12 3/150 2026-03-13 15:01 by JourneyLucky
[¿¼ÑÐ] 277Çóµ÷¼Á +4 anchor17 2026-03-12 4/200 2026-03-13 11:15 by °×Ò¹ÓÆ³¤
[¿¼²©] 2026Ä격ʿÉêÇë +3 QwQwQW10 2026-03-11 3/150 2026-03-12 17:58 by gxch43
[¿¼ÑÐ] 290Çóµ÷¼Á +3 ¿Â»´È» 2026-03-10 8/400 2026-03-11 13:48 by ¿Â»´È»
[¿¼ÑÐ] ´óÁ¬´óѧ»¯Ñ§×¨ÒµÑо¿Éúµ÷¼Á +3 ç÷¾Ã. 2026-03-10 8/400 2026-03-11 10:02 by ç÷¾Ã.
[¿¼ÑÐ] ¹þ¹¤´ó²ÄÁÏ324Çóµ÷¼Á +6 ãÆÐñ¶« 2026-03-10 8/400 2026-03-10 22:49 by ÐÇ¿ÕÐÇÔÂ
[¿¼ÑÐ] 085602»¯¹¤Çóµ÷¼Á +7 ¶­boxing 2026-03-10 7/350 2026-03-10 17:07 by BruceLiu320
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û