Thermodynamic Analyses of Superconducting Gap Structures and Pairing Symmetries of Molecular Charge-Transfer Salts

Imajo Shusaku, Nakazawa Yasuhiro

doi:10.11316/butsuri.78.2_79

Bibliographic Information

Other Title

分子性電荷移動塩の超伝導ギャップの構造と対称性の熱力学的解析

Description

<p>High-resolution heat capacity measurements at low temperatures in magnetic fields are effective for examining gap structures and the pairing symmetries of superconductivity. Angle-resolved heat capacity measurements under in-plane magnetic fields for a series of molecules-based superconductors have revealed that dimer-Mott type compounds show d-wave paring with line-nodal gap structure. The gap symmetry changes from d_xy wave to d_x²－y²+s_± wave depending on dimerization and frustration of the dimer lattice, even though they are in the same superconducting phase in the dimer-Mott phase diagram. In contrast, a non-dimeric compound shows anisotropic full-gapped behavior. The difference in gap structure can be understood based on the difference in their pairing interactions originating from electron correlations.</p>

Journal

Butsuri

Butsuri 78 (2), 79-84, 2023-02-05

The Physical Society of Japan

Details 詳細情報について

CRID: 1390295027678922880

DOI: 10.11316/butsuri.78.2_79

ISSN: 24238872; 00290181

Text Lang: ja

Data Source

JaLC
KAKEN

Abstract License Flag: Disallowed

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