Unconventional spin density wave in (TMTSF)_2PF_6 below T⋆≈4 K

Basletić, Mario and Korin-Hamzić, Bojana and Maki, Kazumi (2002) Unconventional spin density wave in (TMTSF)_2PF_6 below T⋆≈4 K. Physical Review B, 65 (23). pp. 235117-7. ISSN 1098-0121

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The presence of subphases in the spin-density wave (SDW) phase of (TMTSF)2PF6 below T⋆≈4 K has been suggested by several experiments but the nature of the new phase is still controversial. We have investigated the temperature dependence of the angular dependence of the magnetoresistance in the SDW phase which shows different features for temperatures above and below T⋆≈4 K. For T>4 K the magnetoresistance can be understood in terms of the Landau quantization of the quasiparticle spectrum in a magnetic field, where the imperfect nesting plays the crucial role. We propose that below T⋆≈4 K the new unconventional SDW (USDW) appears modifying dramatically the quasiparticle spectrum. Unlike conventional SDW the order parameter of USDW depends on the quasiparticle momentum Δ1(k)∝cos2bky. The present model describes many features of the angular dependence of magnetoresistance reasonably well. Therefore, we may conclude that the subphase in (TMTSF)2PF6 below T⋆≈4 K is described as SDW plus USDW.

Item Type: Article
Date: June 2002
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2002) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 00350103, 119201
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 27 May 2014 17:52
Last Modified: 27 May 2014 17:53
URI: http://digre.pmf.unizg.hr/id/eprint/1621

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