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  Thermodynamic and transport properties of the one-dimensional S=½ antiferromagnet Yb4As3

Gegenwart, P., Aoki, H., Cichorek, T., Custers, J., Harrison, N., Jaime, M., et al. (2002). Thermodynamic and transport properties of the one-dimensional S=½ antiferromagnet Yb4As3. Physica B, 312, 315-320. doi:10.1016/S0921-4526(01)01526-5.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-3187-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-3548-4
Genre: Journal Article

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 Creators:
Gegenwart, P.1, Author              
Aoki, H.2, Author              
Cichorek, T.2, Author              
Custers, J.2, Author              
Harrison, N., Author
Jaime, M., Author
Lang, M.2, Author              
Ochiai, A., Author
Steglich, F.3, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
3Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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Free keywords: Yb4As3; one-dimensional Heisenberg chain; spin glass; Shubnikov-de Haas effect
 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, chi(AC)(T, B), and electrical resistivity, p(T, B). At finite transverse magnetic fields, a gap Delta(B) is induced in the low-energy magnetic excitation spectrum. Our C(T, B) measurements reveal a Delta(B)similar toB(2/3) dependence for Bless than or equal to9T, in accordance with predictions of the quantum sine-Gordon model. At higher fields the Delta(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 60T. We estimate the effective mass and the mean-free path of these carriers and discuss spin-splitting effects. (C) 2002 Elsevier Science B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2002-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 17072
ISI: 000175871000118
DOI: 10.1016/S0921-4526(01)01526-5
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Title: Physica B
  Alternative Title : Physica B
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 312 Sequence Number: - Start / End Page: 315 - 320 Identifier: ISSN: 0921-4526