Commensurate charge-density wave with frustrated interchain coupling in SmNiC2

Alexander Wölfel, Liang Li, Susumu Shimomura, Hideya Onodera, and Sander van Smaalen
Phys. Rev. B 82, 054120 – Published 30 August 2010

Abstract

Temperature-dependent x-ray diffraction on SmNiC2 has shown that the orthorhombic lattice symmetry of this compound persist down to a temperature of at least 9 K, i.e., into the charge-density-wave (CDW) state below TCDW=148K and in the ferromagnetically ordered state below TC=17.7K. The modulated crystal structure has been determined for the incommensurate CDW state with qCDW=(0.5,0.516,0) at T=60K. The observed atomic modulation displacements indicate that the CDW should be considered as a commensurate CDW centered on chains of Ni atoms along a. Frustrated interchain coupling is responsible for the incommensurability of the three-dimensionally ordered CDW state.

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  • Received 5 July 2010

DOI:https://doi.org/10.1103/PhysRevB.82.054120

©2010 American Physical Society

Authors & Affiliations

Alexander Wölfel1, Liang Li1, Susumu Shimomura2, Hideya Onodera3, and Sander van Smaalen1,*

  • 1Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
  • 2Department of Physics, Faculty of Science, Kyoto Sangyo University, Kyoto 603-8555, Japan
  • 3Department of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan

  • *smash@uni-bayreuth.de; www.crystal.uni-bayreuth.de

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Vol. 82, Iss. 5 — 1 August 2010

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