Coexistence of odd-parity and even-parity order parameters in the multipole order phase of the spin-orbit coupled metal C d2 R e2 O7

Y. Matsubayashi, K. Sugii, D. Hirai, Z. Hiroi, T. Hasegawa, S. Sugiura, H. T. Hirose, T. Terashima, S. Uji

研究成果: Article

抜粋

Magnetic torque measurements have been performed to investigate the phase transitions of the metallic pyrochlore compound Cd2Re2O7, in which a spin-orbit (SO) interaction leads to unique multipole orders associated with an inversion symmetry breaking. We find that the magnetic torque signals with a fourfold symmetry (τ4- H4) as well as a twofold symmetry (τ2- H2) are significantly enhanced at low temperatures below a structural phase transition temperature (∼200 K). The analyses of the torque curve symmetries show that the τ4 term arises from an even-parity order parameter (OP) with the irreducible representation Eg, whereas the τ2 term from an odd-parity OP with Eu, T1u or T2u. The parity mixing of the primary OPs shows a peculiar phase transition in the SO coupled Cd2Re2O7. The coexistence of the two OPs provides important insights into the origin of the multipole orders induced by the SO interaction.

元の言語English
記事番号205133
ジャーナルPhysical Review B
101
発行部数20
DOI
出版物ステータスPublished - 2020 5 15
外部発表Yes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

フィンガープリント Coexistence of odd-parity and even-parity order parameters in the multipole order phase of the spin-orbit coupled metal C d<sub>2</sub> R e<sub>2</sub> O<sub>7</sub>' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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