Angular position of nodes in the superconducting gap of 2D unconventional superconductors

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

doi:10.1016/S0921-4534(01)00979-0

Angular position of nodes in the superconducting gap of 2D unconventional superconductors

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

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The superconducting gap structure, especially the direction of the nodes, is an unresolved issue in most of unconventional superconductors. Here, we have measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr₂RuO₄ and heavy fermion CeCoIn₅, in magnetic field rotating within the planes. On the basis of the angular variation of the thermal conductivity, we demonstrate that the gap function of Sr₂RuO₄ is d(k)=Δ₀ẑ(k_x+ik_y)(cos ck_z+α), and the gap function of CeCoIn₅ is d_x2-y2.

Original language	English
Pages (from-to)	15-19
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	367
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(01)00979-0
Publication status	Published - 2002 Feb 15

Keywords

Anisotropic superconductor
Gap function
Thermal conductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(01)00979-0

Cite this

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abstract = "The superconducting gap structure, especially the direction of the nodes, is an unresolved issue in most of unconventional superconductors. Here, we have measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr2RuO4 and heavy fermion CeCoIn5, in magnetic field rotating within the planes. On the basis of the angular variation of the thermal conductivity, we demonstrate that the gap function of Sr2RuO4 is d(k)=Δ0ẑ(kx+iky)(cos ckz+α), and the gap function of CeCoIn5 is dx2-y2.",

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T1 - Angular position of nodes in the superconducting gap of 2D unconventional superconductors

AU - Izawa, K.

AU - Yamaguchi, H.

AU - Matsuda, Yuji

AU - Sasaki, T.

AU - Fukase, T.

AU - Yoshida, Y.

AU - Settai, R.

AU - Onuki, Y.

PY - 2002/2/15

Y1 - 2002/2/15

N2 - The superconducting gap structure, especially the direction of the nodes, is an unresolved issue in most of unconventional superconductors. Here, we have measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr2RuO4 and heavy fermion CeCoIn5, in magnetic field rotating within the planes. On the basis of the angular variation of the thermal conductivity, we demonstrate that the gap function of Sr2RuO4 is d(k)=Δ0ẑ(kx+iky)(cos ckz+α), and the gap function of CeCoIn5 is dx2-y2.

AB - The superconducting gap structure, especially the direction of the nodes, is an unresolved issue in most of unconventional superconductors. Here, we have measured the thermal conductivity of 2D unconventional superconductors, spin-triplet Sr2RuO4 and heavy fermion CeCoIn5, in magnetic field rotating within the planes. On the basis of the angular variation of the thermal conductivity, we demonstrate that the gap function of Sr2RuO4 is d(k)=Δ0ẑ(kx+iky)(cos ckz+α), and the gap function of CeCoIn5 is dx2-y2.

KW - Anisotropic superconductor

KW - Gap function

KW - Thermal conductivity

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Angular position of nodes in the superconducting gap of 2D unconventional superconductors

Abstract

Keywords

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