Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2

K. Yano; T. Sakakibara; T. Tayama; M. Yokoyama; H. Amitsuka; Y. Homma; P. Miranović; M. Ichioka; Y. Tsutsumi; K. Machida

doi:10.1103/PhysRevLett.100.017004

Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2

K. Yano^*, T. Sakakibara, T. Tayama, M. Yokoyama, H. Amitsuka, Y. Homma, P. Miranović, M. Ichioka, Y. Tsutsumi, K. Machida

^*Corresponding author for this work

Program of Physics

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

63 Scopus citations

Abstract

To identify the superconducting gap structure in URu2Si2, we perform field-angle-dependent specific heat measurements for the two principal orientations in addition to field rotations, and a theoretical analysis based on microscopic calculations. The Sommerfeld coefficient γ(H)'s in the mixed state exhibit a distinctly different field dependence. This comes from point nodes and the substantial Pauli paramagnetic effect of URu2Si2. These two features combined give rise to a consistent picture of superconducting properties, including a possible first order transition of Hc2 at low temperatures.

Original language	English
Article number	017004
Journal	Physical Review Letters
Volume	100
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.100.017004
State	Published - 2008/01/10

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2",

abstract = "To identify the superconducting gap structure in URu2Si2, we perform field-angle-dependent specific heat measurements for the two principal orientations in addition to field rotations, and a theoretical analysis based on microscopic calculations. The Sommerfeld coefficient γ(H)'s in the mixed state exhibit a distinctly different field dependence. This comes from point nodes and the substantial Pauli paramagnetic effect of URu2Si2. These two features combined give rise to a consistent picture of superconducting properties, including a possible first order transition of Hc2 at low temperatures.",

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doi = "10.1103/PhysRevLett.100.017004",

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T1 - Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2

AU - Yano, K.

AU - Sakakibara, T.

AU - Tayama, T.

AU - Yokoyama, M.

AU - Amitsuka, H.

AU - Homma, Y.

AU - Miranović, P.

AU - Ichioka, M.

AU - Tsutsumi, Y.

AU - Machida, K.

PY - 2008/1/10

Y1 - 2008/1/10

N2 - To identify the superconducting gap structure in URu2Si2, we perform field-angle-dependent specific heat measurements for the two principal orientations in addition to field rotations, and a theoretical analysis based on microscopic calculations. The Sommerfeld coefficient γ(H)'s in the mixed state exhibit a distinctly different field dependence. This comes from point nodes and the substantial Pauli paramagnetic effect of URu2Si2. These two features combined give rise to a consistent picture of superconducting properties, including a possible first order transition of Hc2 at low temperatures.

AB - To identify the superconducting gap structure in URu2Si2, we perform field-angle-dependent specific heat measurements for the two principal orientations in addition to field rotations, and a theoretical analysis based on microscopic calculations. The Sommerfeld coefficient γ(H)'s in the mixed state exhibit a distinctly different field dependence. This comes from point nodes and the substantial Pauli paramagnetic effect of URu2Si2. These two features combined give rise to a consistent picture of superconducting properties, including a possible first order transition of Hc2 at low temperatures.

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DO - 10.1103/PhysRevLett.100.017004

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VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 017004

ER -

Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2

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