Thermodynamic properties of the non-centrosymmetric type-I superconductor Rh 2Ga 9 and Ir 2Ga 9

Kouhei Wakui; Satoshi Akutagawa; Naoki Kase; Kenji Kawashima; Takahiro Muranaka; Yasufumi Iwahori; Jiro Abe; Jun Akimitsu

doi:10.1143/JPSJ.78.034710

Thermodynamic properties of the non-centrosymmetric type-I superconductor Rh ₂Ga ₉ and Ir ₂Ga ₉

Kouhei Wakui, Satoshi Akutagawa, Naoki Kase, Kenji Kawashima, Takahiro Muranaka, Yasufumi Iwahori, Jiro Abe, Jun Akimitsu

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

28 Citations (Scopus)

Abstract

We report low-temperature specific heat measurements on the single-crystalline non-centrosymmetric superconductors T ₂Ga ₉ (T = Rh, Ir) with T _c = 1:95 and 2.25 K. Electronic contribution on the specific heat, C _el, in each compound is well described by the BCS scheme, suggesting that both Rh ₂Ga ₉ and Ir ₂Ga ₉ fully open an isotropic gap in the superconducting state. The values of ΔC/γTc and 2Δ(0)=k _BT _c indicate that both compounds are categorized as a weak coupling superconductor. The value of ξ obtained from specific heat as a function of magnetic field strongly suggestes that T ₂Ga ₉ is a type-I superconductor.

Original language	English
Article number	034710
Journal	journal of the physical society of japan
Volume	78
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.78.034710
Publication status	Published - Mar 2009
Externally published	Yes

Keywords

Ir Ga
Rh Ga
Specific heat
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.78.034710

Cite this

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title = "Thermodynamic properties of the non-centrosymmetric type-I superconductor Rh 2Ga 9 and Ir 2Ga 9 ",

abstract = "We report low-temperature specific heat measurements on the single-crystalline non-centrosymmetric superconductors T 2Ga 9 (T = Rh, Ir) with T c = 1:95 and 2.25 K. Electronic contribution on the specific heat, C el, in each compound is well described by the BCS scheme, suggesting that both Rh 2Ga 9 and Ir 2Ga 9 fully open an isotropic gap in the superconducting state. The values of ΔC/γTc and 2Δ(0)=k BT c indicate that both compounds are categorized as a weak coupling superconductor. The value of ξ obtained from specific heat as a function of magnetic field strongly suggestes that T 2Ga 9 is a type-I superconductor.",

keywords = "Ir Ga, Rh Ga, Specific heat, Superconductivity",

author = "Kouhei Wakui and Satoshi Akutagawa and Naoki Kase and Kenji Kawashima and Takahiro Muranaka and Yasufumi Iwahori and Jiro Abe and Jun Akimitsu",

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language = "English",

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T1 - Thermodynamic properties of the non-centrosymmetric type-I superconductor Rh 2Ga 9 and Ir 2Ga 9

AU - Wakui, Kouhei

AU - Akutagawa, Satoshi

AU - Kase, Naoki

AU - Kawashima, Kenji

AU - Muranaka, Takahiro

AU - Iwahori, Yasufumi

AU - Abe, Jiro

AU - Akimitsu, Jun

PY - 2009/3

Y1 - 2009/3

N2 - We report low-temperature specific heat measurements on the single-crystalline non-centrosymmetric superconductors T 2Ga 9 (T = Rh, Ir) with T c = 1:95 and 2.25 K. Electronic contribution on the specific heat, C el, in each compound is well described by the BCS scheme, suggesting that both Rh 2Ga 9 and Ir 2Ga 9 fully open an isotropic gap in the superconducting state. The values of ΔC/γTc and 2Δ(0)=k BT c indicate that both compounds are categorized as a weak coupling superconductor. The value of ξ obtained from specific heat as a function of magnetic field strongly suggestes that T 2Ga 9 is a type-I superconductor.

AB - We report low-temperature specific heat measurements on the single-crystalline non-centrosymmetric superconductors T 2Ga 9 (T = Rh, Ir) with T c = 1:95 and 2.25 K. Electronic contribution on the specific heat, C el, in each compound is well described by the BCS scheme, suggesting that both Rh 2Ga 9 and Ir 2Ga 9 fully open an isotropic gap in the superconducting state. The values of ΔC/γTc and 2Δ(0)=k BT c indicate that both compounds are categorized as a weak coupling superconductor. The value of ξ obtained from specific heat as a function of magnetic field strongly suggestes that T 2Ga 9 is a type-I superconductor.

KW - Ir Ga

KW - Rh Ga

KW - Specific heat

KW - Superconductivity

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