Split Fermi Surfaces of the Spin–Orbit-Coupled Metal Cd2Re2O7 Probed by de Haas–van Alphen Effect

Yasuhito Matsubayashi, Kaori Sugii, Hishiro T. Hirose, Daigorou Hirai, Shiori Sugiura, Taichi Terashima, Shinya Uji, Zenji Hiroi

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7 Citations (Scopus)

Abstract

The superconducting pyrochlore oxide Cd2Re2O7 shows a structural transition with inversion symmetry breaking (ISB) at Ts1 = 200 K. A recent theory [L. Fu, Phys. Rev. Lett. 115, 026401 (2015)] suggests that the origin is an electronic instability that leads to a multipolar order in the spin–orbit-coupled metal. To observe the Fermi surface of the low-temperature phase of Cd2Re2O7, we perform de Haas–van Alphen effect measurements by means of magnetic torque. In reference to a calculated band structure, the spin-split Fermi surfaces with large cyclotron masses of 5–9m0 are revealed. The splitting is suggested to be due to an antisymmetric spin–orbit coupling induced by ISB, the strength of which is estimated to be approximately 67 K, which is rather smaller than those of typical non-centrosymmetric metals.

Original languageEnglish
Article number053702
Journaljournal of the physical society of japan
Volume87
Issue number5
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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