Thermodynamic and transport properties of the one-dimensional S = 1/2 antiferromagnet Yb4As3

P. Gegenwart, Hayuyoshi Aoki, T. Cichorek, J. Custers, N. Harrison, M. Jaime, M. Lang, A. Ochiai, F. Steglich

Research output: Contribution to journalConference article

16 Citations (Scopus)

Abstract

The semimetallic quasi-one-dimensional S = 1/2 antiferromagnet Yb4As3 has been studied by performing low-temperature (T) and high magnetic-field (B) measurements of the specific heat, C(T,B), magnetization, M(T,B), AC-susceptibility, χAC(T,B), and electrical resistivity, ρ(T,B). At finite transverse magnetic fields, a gap Δ(B) is induced in the low-energy magnetic excitation spectrum. Our C(T,B) measurements reveal a Δ(B)∼B2/3 dependence for B≤9 T, in accordance with predictions of the quantum sine-Gordon model. At higher fields the Δ(B) curve levels-off gradually. In the isothermal magnetization taken at 0.6 K no saturation occurs up to 60 T. We also present new results on spin-glass behavior below 0.15 K caused by a weak ferromagnetic interchain coupling and disorder. Finally, we concentrate on the electrical transport properties. Shubnikov-de Haas oscillations, arising from a low-density system of mobile As-4p holes, are recorded in magnetic fields up to 60 T. We estimate the effective mass and the mean-free path of these carriers and discuss spin-splitting effects.

Original languageEnglish
Pages (from-to)315-320
Number of pages6
JournalPhysica B: Condensed Matter
Volume312-313
DOIs
Publication statusPublished - 2002 Mar 1
EventInternational Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
Duration: 2002 Aug 62002 Aug 6

Keywords

  • One-dimensional Heisenberg chain
  • Shubnikov-de Haas effect
  • Spin glass
  • YbAs

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Gegenwart, P., Aoki, H., Cichorek, T., Custers, J., Harrison, N., Jaime, M., Lang, M., Ochiai, A., & Steglich, F. (2002). Thermodynamic and transport properties of the one-dimensional S = 1/2 antiferromagnet Yb4As3. Physica B: Condensed Matter, 312-313, 315-320. https://doi.org/10.1016/S0921-4526(01)01526-5