Probing the nodal structure in quasi-2D unconventional superconductors by thermal conductivity

K. Izawa; H. Yamaguchi; Y. Matsuda; T. Sasaki; R. Settai; Y. Onuki

doi:10.1016/S0022-3697(02)00134-8

Probing the nodal structure in quasi-2D unconventional superconductors by thermal conductivity

K. Izawa, H. Yamaguchi, Y. Matsuda, T. Sasaki, R. Settai, Y. Onuki

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

The superconducting gap structure is an unresolved issue in most of unconventional superconductors. Here we measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr₂RuO₄, heavy fermion CeCoIn₅ and organic κ-(BEDT-TTF)₂Cu(NCS)₂, in magnetic field rotating within the 2D planes. On the basis of the angular variation in the thermal conductivity, we demonstrate that the gap function is d(k) = Δ₀ẑ(k_x + ik_y)(cos ck_z + α) for Sr₂RuO₄, d_x(2)-y(2) for CeCoIn₅, and d_xy for κ-(BEDT-TTF)₂Cu(NCS)₂.

Original language	English
Pages (from-to)	1055-1059
Number of pages	5
Journal	Journal of Physics and Chemistry of Solids
Volume	63
Issue number	6-8
DOIs	https://doi.org/10.1016/S0022-3697(02)00134-8
Publication status	Published - 2002 Jun 1
Externally published	Yes
Event	Proceedings of the 8th ISSP International Symposium - Tokyo, Japan Duration: 2001 Nov 2 → 2001 Nov 5

Keywords

A. Superconductors
D. Superconductivity
D. Thermal conductivity

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/S0022-3697(02)00134-8

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title = "Probing the nodal structure in quasi-2D unconventional superconductors by thermal conductivity",

abstract = "The superconducting gap structure is an unresolved issue in most of unconventional superconductors. Here we measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr2RuO4, heavy fermion CeCoIn5 and organic κ-(BEDT-TTF)2Cu(NCS)2, in magnetic field rotating within the 2D planes. On the basis of the angular variation in the thermal conductivity, we demonstrate that the gap function is d(k) = Δ0ẑ(kx + iky)(cos ckz + α) for Sr2RuO4, dx(2)-y(2) for CeCoIn5, and dxy for κ-(BEDT-TTF)2Cu(NCS)2.",

keywords = "A. Superconductors, D. Superconductivity, D. Thermal conductivity",

author = "K. Izawa and H. Yamaguchi and Y. Matsuda and T. Sasaki and R. Settai and Y. Onuki",

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T1 - Probing the nodal structure in quasi-2D unconventional superconductors by thermal conductivity

AU - Izawa, K.

AU - Yamaguchi, H.

AU - Matsuda, Y.

AU - Sasaki, T.

AU - Settai, R.

AU - Onuki, Y.

PY - 2002/6/1

Y1 - 2002/6/1

N2 - The superconducting gap structure is an unresolved issue in most of unconventional superconductors. Here we measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr2RuO4, heavy fermion CeCoIn5 and organic κ-(BEDT-TTF)2Cu(NCS)2, in magnetic field rotating within the 2D planes. On the basis of the angular variation in the thermal conductivity, we demonstrate that the gap function is d(k) = Δ0ẑ(kx + iky)(cos ckz + α) for Sr2RuO4, dx(2)-y(2) for CeCoIn5, and dxy for κ-(BEDT-TTF)2Cu(NCS)2.

AB - The superconducting gap structure is an unresolved issue in most of unconventional superconductors. Here we measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr2RuO4, heavy fermion CeCoIn5 and organic κ-(BEDT-TTF)2Cu(NCS)2, in magnetic field rotating within the 2D planes. On the basis of the angular variation in the thermal conductivity, we demonstrate that the gap function is d(k) = Δ0ẑ(kx + iky)(cos ckz + α) for Sr2RuO4, dx(2)-y(2) for CeCoIn5, and dxy for κ-(BEDT-TTF)2Cu(NCS)2.

KW - A. Superconductors

KW - D. Superconductivity

KW - D. Thermal conductivity

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