Equilibrium Low Temperature Heat Capacity of the Spin Density Wave compound (TMTTF)2 Br: effect of a Magnetic Field

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dc.creatorSahling, S.
dc.creatorLasjaunias, J. C.
dc.creatorMélin, R.
dc.creatorMonceau, P.
dc.creatorReményi, G.
dc.date2007-08-03
dc.date.accessioned2026-07-07T08:35:17Z
dc.date.available2026-07-07T08:35:17Z
dc.descriptionWe have investigated the effect of the magnetic field (B) on the very low-temperature equilibrium heat capacity ceq of the quasi-1 D organic compound (TMTTF)2Br, characterized by a commensurate Spin Density Wave (SDW) ground state. Below 1K, ceq is dominated by a Schottky-like contribution, very sensitive to the experimental time scale, a property that we have previously measured in numerous DW compounds. Under applied field (in the range 0.2- 7 T), the equilibrium dynamics, and hence ceq extracted from the time constant, increases enormously. For B = 2-3 T, ceq varies like B2, in agreement with a magnetic Zeeman coupling. Another specific property, common to other Charge/Spin density wave (DW) compounds, is the occurrence of metastable branches in ceq, induced at very low temperature by the field exceeding a critical value. These effects are discussed within a generalization to SDWs in a magnetic field of the available Larkin-Ovchinnikov local model of strong pinning. A limitation of the model when compared to experiments is pointed out.
dc.description10 pages, 11 figures
dc.identifierhttps://arxiv.org/abs/0708.0540
dc.identifierhttp://arxiv.org/abs/0708.0540
dc.identifierEur. Phys. J. B 59 (2007) 9-17
dc.identifierdoi:10.1140/epjb/e2007-00262-8
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139697
dc.subjectDisordered Systems and Neural Networks
dc.subjectMaterials Science
dc.titleEquilibrium Low Temperature Heat Capacity of the Spin Density Wave compound (TMTTF)2 Br: effect of a Magnetic Field
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