title 擬一次元超伝導 …...=>#?bc@8(tmtsf)2clo4 adc_e2345fghbc@ij anomalous...
TRANSCRIPT
Title <研究ノート>擬一次元超伝導体(TMTSF)[2]ClO[4]の強磁場下における新奇な超伝導状態
Author(s) 米澤, 進吾
Citation 低温物質科学研究センター誌 : LTMセンター誌 (2009),15: 28-36
Issue Date 2009-12-01
URL https://doi.org/10.14989/153245
Right
Type Departmental Bulletin Paper
Textversion publisher
Kyoto University
=>#?bc@8(TMTSF)2ClO4AdC_e2345fghbc@ij
Anomalous superconducting state in strong magnetic fields observed in the quasi-one-dimensional superconductor (TMTSF)2ClO4
klmn � ^¡^¡¢Æ¡§¨©
Shingo Yonezawa Graduate School of Science, Kyoto University
We have revealed anomalous phenomena in the superconducting state of the quasi-one-dimensional
system (TMTSF)2ClO4 in precisely aligned high magnetic fields. The onset temperature of the superconductivity Tc
onset exhibits anomalous dependence on the magnetic field direction. The results are likely to be closely related to the Pauli paramagnetic pair-breaking effect and the field-induced dimensional crossover.
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�h>46z3}ÔÓ5ÁHAܬÕO(TMTSF)2X»TMTSF = tetrametyle tetraselena fulvaleneOX = ClO4, PF6, etc.À�]K5Ô�ûÐÃ~()ïAbc@8[2,3]|}ÔT�{2ê�h`Mza5ÔÓ5ïú¬Ç5Á>~OTMTSF1«ÊAæ)2A9PÓc@YzWò=>#?A@Ý8¬Ç5|Óè>Õ'!2¨±5Á«2OTMTSF1*ÕT0Ï0ìò«2{hÝ-¶·zÕò=>#?@ÝYïúA 1 ò¬Ç5|ñèÂ|جÒO=>#?Ý-1AÒÓ0ïú|}ÔÕÆ1|ÖÚABGìÌb[{2§¨ÐÃÔÓ5[4]Á ýþÌ*ô TMTSF1Añ|ò¬Ç5(TMTSF)2ClO423ÓÔ+bc@�0�£��·AC_
oæYAfgh:¬,Ù+ÈíïwVAC_oæY,|Óègch×}zûU}~[5,6]ÁÅüzdݬ=>#?1¬8Ò5bc@AGHÐ2òÓÔqczWóÔÓ~!4ÃZeÓ¬Ç5Á h3Oŧ¨º86-ïY§¨VA=6fR�üOg_h>{|OTMTSF 1A�ûþ[2,3]¬Ç5��0.A Jérome�üÙÓ0Ô�¤A Bechgaard�üA10�Ï|AEA§¨¬O«2*+ Bechgaard�ü2Ãs}ÔÒÓÔÓ5Á ®(TMTSF)2X 1¯°i����4:-±�i?*]^
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28
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5C_AjË2Õ®À±5Á¬OHP,�hÒÓ02Äéß| HP / Tc ~ 18.4 kOe/K|Óè<ìÌû�ÕÃ5Â|ØàÌÃÔ3â[11]OTMTSF 1A_�ÕfgÂAû�ØàÀ¬Ç5Â|Ø4ìóÔÓ5»Tc ~ 1.45 K2µ}Ô HP ~ 23-26 kOeÀ[6]ÁHP7]AC_ܬO� 2(a)Açè2])Ò./0|e)Ò./0Ac@Ý-ØCyzW~hÓ./0 1 ê?bc@µz+3±5çâÕOµz�̹2c@Ý-©8|}ÔC_æ)ACyzWó~fèØ-.0/�{2mʬÇ5~5O
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31
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}~ÁHA~52t=Ø°Ó~A� 4(a)Açè2C_æ)z 3 #?{2b&®¬Ò5/¤�0Ô1.£��N[22]¬Ç5ÁTMTSF 1AçèhoæYAdÓbc@8¬C_æ)ؼ¹ì¬Õ@ÝYAPÓæ)ì̹Ã5|bc@ØypÐÃÔ}>è~5C_æ)zb&®}~]¬A
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6
6.2
6.4
6.6
6.8
7
7.2
7.4
7.6
0 0.2 0.4 0.6 0.8
Rc*
(+)
T (K)
H // b' = 50 kOe
(TMTSF)2ClO4
H // c*= 0.0 kOe
H // c* = 0.5 kOe
&, (1
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"1)
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H // b' = 50 kOe
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(a) (b) (c)
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1
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2
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32
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Tconset|C_d·AÇ}z�}ÔÓ5ÁyA>¬�}ÔÓ5çè2OC_æ)Ø H // a| H // b'AÓ¹Ã23ÓÔÕ�NA]�¬Ç5 50 kOe>¬bc@ØmʬÇ5Â|Ø4ìó~ÁÂAçè2#?YA,eØ8Ò5 H // b'!4¬hßOG¤Ac@YØö~Ã5 H // a¬Õ 50 kOe|ÓèPC_>¬bc@ØmʬÇ5Â|ØK5Ô�ÐÃ~Á #2O� 5(d)@ÝG»ab'GÀ½¬C_zZJÐÑ~|ÒA Tc
onset AC_+·*) ÅrYzÏ¥£�}~ÕA¬Ç5Á¬*#@ÝG½¬C_| a¹A3±+·|}ÔÊ�}ÔÓ5Á,C_¬ÂÃ|Óó~«¬A�ÓC_+·ÅrY¬Ç5ØOPC_2Óß2òÃÔ<Ìì2gch+·
ÅrYØÎÏÔÓ5Â|Ø4ì5Á>¹O20 kOe7]AC_ܬ*) = ±17°<ô¬ Tconset (*) ) æ
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0 0.2 0.4 0.6 0.8
1 1.2 1.4
b’ b’a abH // ab =5.0 kOe
10.0 kOe15.0 kOe20.0 kOe25.0 kOe30.0 kOe35.0 kOe40.0 kOe
0 0.2
T conse
t (K)
42.5 kOe
0 0.2
45.0 kOe
0 0.2
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[1] H. K. Onnes, Koninklijke Nederlandsche Akademie van Wetenschappen Proceedings 14, 113 (1911); H. K. Onnes, ibid 14, 818 (1912).
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kl mn »Shingo YONEZAWAÀ � ^¡^¡¢Æ¡§¨© ïÆ¡]�¡ïÆ¡�� u� »º86-ïY§¨V Tel: 075-753-3744À [email protected] 2005& 3' � ^¡Æ¡%i 2008& 3' � ^¡Æ¡�i 2008& 4' � ^¡^¡¢Æ¡§¨© �i§¨� 2008& 7'çâצ
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