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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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Gegenwart, P.1, Autor           
Aoki, H.2, Autor           
Cichorek, T.2, Autor           
Custers, J.2, Autor           
Jaime, M., Autor
Ochiai, A., Autor
Steglich, F.3, Autor           
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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Schlagwörter: S=1/2 antiferromagnet Yb4As3; magnetotransport; isothermal resistivity; heavy fermion; Shubnikov-de Haas oscillations
 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2002-05
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 17331
ISI: 000176937700002
DOI: 10.1007/s12043-002-0161-x
 Art des Abschluß: -

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Titel: Pramana-Journal of Physics
  Alternativer Titel : Pramana-J. Phys.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 58 (5-6) Artikelnummer: - Start- / Endseite: 715 - 723 Identifikator: ISSN: 0304-4289