NMR and NQR studies on non-centrosymmetric superconductors Re 7B3, LaBiPt, and BiPd

Kazuaki Matano, Satoki Maeda, Hiroki Sawaoka, Yuji Muro, Toshiro Takabatake, Bhanu Joshi, Srinivasan Ramakrishnan, Kenji Kawashima, Jun Akimitsu, Guo-Qing Zheng

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Abstract

We report the nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements for noncentrosymmetric superconductors Re 7B3, LaBiPt, and BiPd containing heavy elements. For all three compounds, the spin-lattice relaxation rate 1=T1 shows a coherence peak just below Tc and decreases exponentially at low temperatures, which indicates that an isotropic superconducting gap is dominant in these compounds. In BiPd, the height of the coherence peak just below T c is much suppressed, which suggests that there exists a substantial component of gap with nodes in this compound. Our results indicate that heavy element is not the only factor, but the extent of inversion symmetry breaking is also important to induce a large spin-orbit coupling and an unconventional superconducting state.

Original languageEnglish
Article number084711
JournalJournal of the Physical Society of Japan
Volume82
Issue number8
DOIs
Publication statusPublished - Aug 2013

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nuclear quadrupole resonance
heavy elements
nuclear magnetic resonance
spin-lattice relaxation
broken symmetry
inversions
orbits

Keywords

  • NMR
  • Non-centrosymmetric superconductors
  • NQR

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

NMR and NQR studies on non-centrosymmetric superconductors Re 7B3, LaBiPt, and BiPd. / Matano, Kazuaki; Maeda, Satoki; Sawaoka, Hiroki; Muro, Yuji; Takabatake, Toshiro; Joshi, Bhanu; Ramakrishnan, Srinivasan; Kawashima, Kenji; Akimitsu, Jun; Zheng, Guo-Qing.

In: Journal of the Physical Society of Japan, Vol. 82, No. 8, 084711, 08.2013.

Research output: Contribution to journalArticle

Matano, Kazuaki ; Maeda, Satoki ; Sawaoka, Hiroki ; Muro, Yuji ; Takabatake, Toshiro ; Joshi, Bhanu ; Ramakrishnan, Srinivasan ; Kawashima, Kenji ; Akimitsu, Jun ; Zheng, Guo-Qing. / NMR and NQR studies on non-centrosymmetric superconductors Re 7B3, LaBiPt, and BiPd. In: Journal of the Physical Society of Japan. 2013 ; Vol. 82, No. 8.
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AU - Takabatake, Toshiro

AU - Joshi, Bhanu

AU - Ramakrishnan, Srinivasan

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