Partial gap opening on the Fermi surface of the noncentrosymmetric superconductor Mo 3Al 2C

T. Koyama, Y. Ozaki, K. Ueda, T. Mito, T. Kohara, T. Waki, Y. Tabata, C. Michioka, K. Yoshimura, M. T. Suzuki, H. Nakamura

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We report the results of 27Al nuclear magnetic resonance and specific-heat measurements of the noncentrosymmetric superconductor Mo 3Al 2C in the normal state. The phase transition at ∼130 K is inferred from a distinct change in the NMR spectrum, a clear peak in the spin-echo decay rate, and an anomaly in the specific heat. At ∼130 K, the Knight shift and the spin-lattice relaxation rate 1/T 1 exhibit a significant decrease, which is associated with a reduction in the conduction electron density. These results suggest most probably charge-density wave ordering at ∼130 K. Furthermore, the decrease in 1/T 1 below the superconducting transition temperature suggests that superconductivity emerges on the partially quenched Fermi surface.

Original languageEnglish
Article number212501
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number21
DOIs
Publication statusPublished - 2011 Dec 27
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Partial gap opening on the Fermi surface of the noncentrosymmetric superconductor Mo <sub>3</sub>Al <sub>2</sub>C'. Together they form a unique fingerprint.

Cite this