Numéro
J. Phys. I France
Volume 3, Numéro 5, May 1993
Page(s) 1187 - 1199
DOI https://doi.org/10.1051/jp1:1993264
DOI: 10.1051/jp1:1993264
J. Phys. I France 3 (1993) 1187-1199

Magnetotransport investigation of the low-temperature state of transition (BEDT-TTF) $_{\rm {2}}$TIHg(SCN) $_{\rm {4}}$ : evidence for a Peierls-type transition

M. V. Kartsovnik1, A. E. Kovalev1 and N. D. Kushch2

1  Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chemogolovka, MD, Russia
2  Jnstitute of Chemical Physics in Chemogolovka, Russian Academy of Sciences, 142432, Chemogolovka, MD, Russia


(Received 22 December 1992, accepted 26 January 1993)

Abstract
Detailed magnetoresistance measurements have been performed on (BEDT-TTF) $_{\rm {2}}$TlHg(SCN) $_{\rm {4}}$. An analysis of angle dependent semi-classical magnetoresistance oscillations is presented in connection with possible changes in the electron spectrum at low temperatures. A spin density wave is proposed to arise leading to a modification of the Fermi surface so that new open sheets appear, consistent with the observed angular magnetoresistance oscillations. Some details of the Shubnikov-de Haas effect are also presented which can be explained by the existence of a magnetic breakdown network, in agreement with the proposed low- temperature electronic state of the compound.

PACS
72.15G - 73.201 - 74.70K

© Les Editions de Physique 1993

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