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, Masanori Ichioka, Y. Tsutsumi, K. Machida

Research output: Contribution to journalArticle

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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 languageEnglish
Article number017004
JournalPhysical Review Letters
Volume100
Issue number1
DOIs
Publication statusPublished - Jan 10 2008

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heavy fermion superconductors
heat measurement
specific heat
coefficients

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Yano, K., Sakakibara, T., Tayama, T., Yokoyama, M., Amitsuka, H., Homma, Y., ... Machida, K. (2008). Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2. Physical Review Letters, 100(1), [017004]. https://doi.org/10.1103/PhysRevLett.100.017004

Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2. / Yano, K.; Sakakibara, T.; Tayama, T.; Yokoyama, M.; Amitsuka, H.; Homma, Y.; Miranović, P.; Ichioka, Masanori; Tsutsumi, Y.; Machida, K.

In: Physical Review Letters, Vol. 100, No. 1, 017004, 10.01.2008.

Research output: Contribution to journalArticle

Yano, K, Sakakibara, T, Tayama, T, Yokoyama, M, Amitsuka, H, Homma, Y, Miranović, P, Ichioka, M, Tsutsumi, Y & Machida, K 2008, 'Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2', Physical Review Letters, vol. 100, no. 1, 017004. https://doi.org/10.1103/PhysRevLett.100.017004
Yano, K. ; Sakakibara, T. ; Tayama, T. ; Yokoyama, M. ; Amitsuka, H. ; Homma, Y. ; Miranović, P. ; Ichioka, Masanori ; Tsutsumi, Y. ; Machida, K. / Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2. In: Physical Review Letters. 2008 ; Vol. 100, No. 1.
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