Interplay between phase defects and spin polarization in the specific heat of the spin density wave compound (TMTTF)2Br in a magnetic field
R. Mélin, J. C. Lasjaunias, S. Sahling, G. Remenyi, K. Biljakovic
Abstract
Equilibrium heat relaxation experiments provide evidence that the ground state of the commensurate spin density wave (SDW) compound (TMTTF)2Br after the application of a sufficient magnetic field is different from the conventional ground state. The experiments are interpreted on the basis of the local model of strong pinning as the deconfinement of soliton-antisoliton pairs triggered by the Zeeman coupling to spin degrees of freedom, resulting in a magnetic field induced density wave glass for the spin carrying phase configuration.
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