Magnetic response of noncentrosymmetric superconductor La2 C3

Effect of double-gap and spin-orbit interaction

R. Kadono, M. Hiraishi, M. Miyazaki, K. H. Satoh, S. Takeshita, S. Kuroiwa, S. Saura, Jun Akimitsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The presence of spin-orbit (SO) interaction in a noncentrosymmetric superconductor, La2 C3 (Tc ≃ 11 K) is demonstrated by muon spin rotation (μSR) in its normal state, where μSR spectra exhibit field-induced weak depolarization due to van Vleck-like local susceptibility. In the mixed state, muon spin relaxation due to inhomogeneity of internal field (σv) exhibits a field dependence that is characterized by a kink, where σv (and hence the superfluid density) is more strongly reduced at lower fields. This is perfectly in line with the presence of a secondary energy gap previously inferred from the temperature dependence of σv, and also consistent with the possible influence of asymmetric deformation of the Fermi surface due to the SO interaction.

Original languageEnglish
Pages (from-to)737-739
Number of pages3
JournalPhysica B: Condensed Matter
Volume404
Issue number5-7
DOIs
Publication statusPublished - Apr 15 2009
Externally publishedYes

Fingerprint

spin-orbit interactions
Superconducting materials
Orbits
muon spin rotation
Fermi surface
Depolarization
depolarization
Fermi surfaces
muons
inhomogeneity
Energy gap
magnetic permeability
temperature dependence
Temperature

Keywords

  • Quasiparticle excitation
  • Spin-orbit interaction
  • Superconductivity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Magnetic response of noncentrosymmetric superconductor La2 C3 : Effect of double-gap and spin-orbit interaction. / Kadono, R.; Hiraishi, M.; Miyazaki, M.; Satoh, K. H.; Takeshita, S.; Kuroiwa, S.; Saura, S.; Akimitsu, Jun.

In: Physica B: Condensed Matter, Vol. 404, No. 5-7, 15.04.2009, p. 737-739.

Research output: Contribution to journalArticle

Kadono, R. ; Hiraishi, M. ; Miyazaki, M. ; Satoh, K. H. ; Takeshita, S. ; Kuroiwa, S. ; Saura, S. ; Akimitsu, Jun. / Magnetic response of noncentrosymmetric superconductor La2 C3 : Effect of double-gap and spin-orbit interaction. In: Physica B: Condensed Matter. 2009 ; Vol. 404, No. 5-7. pp. 737-739.
@article{fe0528f1442b419a8688e6dfa9bca4a8,
title = "Magnetic response of noncentrosymmetric superconductor La2 C3: Effect of double-gap and spin-orbit interaction",
abstract = "The presence of spin-orbit (SO) interaction in a noncentrosymmetric superconductor, La2 C3 (Tc ≃ 11 K) is demonstrated by muon spin rotation (μSR) in its normal state, where μSR spectra exhibit field-induced weak depolarization due to van Vleck-like local susceptibility. In the mixed state, muon spin relaxation due to inhomogeneity of internal field (σv) exhibits a field dependence that is characterized by a kink, where σv (and hence the superfluid density) is more strongly reduced at lower fields. This is perfectly in line with the presence of a secondary energy gap previously inferred from the temperature dependence of σv, and also consistent with the possible influence of asymmetric deformation of the Fermi surface due to the SO interaction.",
keywords = "Quasiparticle excitation, Spin-orbit interaction, Superconductivity",
author = "R. Kadono and M. Hiraishi and M. Miyazaki and Satoh, {K. H.} and S. Takeshita and S. Kuroiwa and S. Saura and Jun Akimitsu",
year = "2009",
month = "4",
day = "15",
doi = "10.1016/j.physb.2008.11.186",
language = "English",
volume = "404",
pages = "737--739",
journal = "Physica B: Condensed Matter",
issn = "0921-4526",
publisher = "Elsevier",
number = "5-7",

}

TY - JOUR

T1 - Magnetic response of noncentrosymmetric superconductor La2 C3

T2 - Effect of double-gap and spin-orbit interaction

AU - Kadono, R.

AU - Hiraishi, M.

AU - Miyazaki, M.

AU - Satoh, K. H.

AU - Takeshita, S.

AU - Kuroiwa, S.

AU - Saura, S.

AU - Akimitsu, Jun

PY - 2009/4/15

Y1 - 2009/4/15

N2 - The presence of spin-orbit (SO) interaction in a noncentrosymmetric superconductor, La2 C3 (Tc ≃ 11 K) is demonstrated by muon spin rotation (μSR) in its normal state, where μSR spectra exhibit field-induced weak depolarization due to van Vleck-like local susceptibility. In the mixed state, muon spin relaxation due to inhomogeneity of internal field (σv) exhibits a field dependence that is characterized by a kink, where σv (and hence the superfluid density) is more strongly reduced at lower fields. This is perfectly in line with the presence of a secondary energy gap previously inferred from the temperature dependence of σv, and also consistent with the possible influence of asymmetric deformation of the Fermi surface due to the SO interaction.

AB - The presence of spin-orbit (SO) interaction in a noncentrosymmetric superconductor, La2 C3 (Tc ≃ 11 K) is demonstrated by muon spin rotation (μSR) in its normal state, where μSR spectra exhibit field-induced weak depolarization due to van Vleck-like local susceptibility. In the mixed state, muon spin relaxation due to inhomogeneity of internal field (σv) exhibits a field dependence that is characterized by a kink, where σv (and hence the superfluid density) is more strongly reduced at lower fields. This is perfectly in line with the presence of a secondary energy gap previously inferred from the temperature dependence of σv, and also consistent with the possible influence of asymmetric deformation of the Fermi surface due to the SO interaction.

KW - Quasiparticle excitation

KW - Spin-orbit interaction

KW - Superconductivity

UR - http://www.scopus.com/inward/record.url?scp=62949127876&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=62949127876&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2008.11.186

DO - 10.1016/j.physb.2008.11.186

M3 - Article

VL - 404

SP - 737

EP - 739

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

IS - 5-7

ER -