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  Magnetotransport of the low-carrier density one-dimensional S=1/2 antiferromagnet Yb4As3

Gegenwart, P., Aoki, H., Cichorek, T., Custers, J., Jaime, M., Ochiai, A., et al. (2002). Magnetotransport of the low-carrier density one-dimensional S=1/2 antiferromagnet Yb4As3. Pramana-Journal of Physics, 58(5-6), 715-723. doi:10.1007/s12043-002-0161-x.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-3155-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-3546-6
Genre: Journal Article

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 Creators:
Gegenwart, P.1, Author              
Aoki, H.2, Author              
Cichorek, T.2, Author              
Custers, J.2, Author              
Jaime, M., 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: S=1/2 antiferromagnet Yb4As3; magnetotransport; isothermal resistivity; heavy fermion; Shubnikov-de Haas oscillations
 Abstract: The transport properties of the semimetallic quasi-one- dimensional S = 1/2 antiferromagnet Yb4As3 have been studied by performing low-temperature (T greater than or equal to 0.02 K) and high magnetic-field (B less than or equal to 60 T) measurements of the electrical resistivity rho(T, B). For T greater than or similar to 2 K a 'heavy-fermion'-like behavior Deltarho(T) = AT(2) with huge and nearly field-independent coefficient A approximate to 3 muOmega cm/K-2 is observed, whereas at lower temperatures rho(T) deviates from this behavior and slightly increases to the lowest T. In B > 0 and T less than or similar to 6 K the resistivity shows an anomalous magnetic-hi story dependence together with an unusual relaxation behavior. In the isothermal resistivity Shubnikov-de Haas (SdH) oscillations, arising from a low-density system of mobile As-4p holes, with a frequency of 25 T have been recorded. From the T- and B-dependence of the SdH oscillations an effective carrier mass of (0.275 +/- 0.005)m(0) and a charge-carrier mean-free path of 215 Angstrom are determined. Furthermore, in B greater than or equal to 15 T, the system is near the quantum limit and spin-splitting effects are observed.

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Language(s): eng - English
 Dates: 2002-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 17331
ISI: 000176937700002
DOI: 10.1007/s12043-002-0161-x
 Degree: -

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Title: Pramana-Journal of Physics
  Alternative Title : Pramana-J. Phys.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 58 (5-6) Sequence Number: - Start / End Page: 715 - 723 Identifier: ISSN: 0304-4289