Spin Fluctuation-Induced Superconductivity in Organic Compounds
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概要
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Spin fluctuation-induced supercondtzctivity in two-ditnensional organic cornpounds strch as n-(ET)2,X' is investigated using a sirnplified dirner Htrbbard rtaodel with a right-angled isoscelestriangular lattice (transfer rnatrices -r, -r'). The dynatnical strsceptibility and the self-energyare calculated self-consistently within the fluctuation exchange approxinaation, and the valttefor T. obtained by solving the linearized Bliashberg-type eqtuations is in good agreement withthe experimental results. The pairing sytaarnetry is of the d.z .2 type. The calctrlated (U/r)-dependence of' T. coznpares qtralitatively well with the observed presstrre dependence of T..Varying the V21lU1(l) for r' /r f'rotta O to l, we Interpol;tte between the sqtnare lattice and the regulartriangular lattice and find first that relative v?rltres of' T. for x-(ET)zX and cuprates are reason-ably explained and second that T. tends to decrease with inco'easing T'/T. No superconductivityis fotrnd f'or r'/r : l, the regtrlar triangtrlar lattice.
- 社団法人日本物理学会の論文
- 1998-11-15
著者
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Moriya Toru
Department Of Physics Faculty Of Science And Technology Science University Of Tokyo
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Kondo Hisashi
Department Of Physics Faculty Of Science And Technology Science University Of Tokyo
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Moriya Toru
Deparment Of Physics Wasea University
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