Meissner Effect Due to Cooper Pairs between Bloch Electrons : Analysis of Panetration Depth of Yba_2Cu_3O_7

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概要

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• A tlteory of tlae Meissner effect due to Coojaer pairs betxveen BIOCII electrouas ispresented in tlte gatuge-iuax'ariautt for?m 1)>' imtcludiutg effects of strouvg electron correlalion. Tlae tlteory is ajcplied to amaal)'zing observed penetration deptlv 2(T) ofYBa.Cu.O,with 7'.;90K. Observed 2,(O):14OOA can be explain?ed, if tlte effectivel112lSS of quasiparticles is about tezt times as large as the electron mass. By assunaingtlvat the supercoxtducting gap is as large as 2e(3/T.:S, as imjclied by many ex-periuneutts, it is SIIONVII tlaat anisotrojcic Cooper pairs between heavy electroras in tlteMolt-transition region can explain tl?e o bserved 2 ( T ) above 35 K. One of the possiblescenarios to exjvlain tlte data below 35 K is a successive superconductizvg trauvsition atT..: 35K, as implied by small but sharp amtoxmalies iun the transverse nuclearquadrupole relaxatiou? rate. It is argttecl tltat tlae conaplete g8]) is open below T.. $ 35K.[Meissners u p en' co n - ll ductivitysupercon- ll ducting 'Ieffect, penetratioxa depth, gatuge invariance, high temperatureYBa.Cu.O, lteavy electrons, Molt transition, successuvetrauas?txoxt

• 社団法人日本物理学会の論文
• 1992-02-15

著者

• J.ohkawa Fusayoshi

  Department Of Physics Hokkaido University

関連論文

• Meissner Effect Due to Cooper Pairs between Bloch Electrons : Analysis of Panetration Depth of Yba_2Cu_3O_7
• Second Superconducting Transition Driven by Charge Density Wave
• Electron Correlation in the Hubbard Model in d=+∞ dimension : Heavy Electrons in the Mott-Transition Region

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