J. Phys. IV France
Volume 131, December 2005
Page(s) 281 - 282
Publié en ligne 18 janvier 2006
International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 281-282

DOI: 10.1051/jp4:2005131071

Thermodynamic properties of relaxed (TMTSF)2ClO4 in magnetic field; the one-electron picture

D. Radic1, A. Bjelis1 and D. Zanchi2

1  Department of Physics, Faculty of Science, University of Zagreb, PO Box 162, Bijenicka 32, 10001 Zagreb, Croatia
2  Laboratoire de Physique Théorique et Hautes Énergies, Universités Paris VI Pierre et Marie Curie-Paris VII Denis Diderot, 2 place Jussieu, 75252 Paris Cedex, France

We analyse thermodynamic properties of band electrons in the normal state of relaxed (TMTSF)2ClO4 with transverse dimerization potential V due to anion ordering and with a finite external magnetic field. Providing the exact solution for electron spectrum, we extend the scope of analysis from perturbative limit covered in previous literature to the physically relevant regime of large dimerizing potentials comparable to the electron interchain hopping t. The one-electron spectrum shows characteristic oscillations, periodic in inverse magnetic field, best fitted with $V/t\approx
0.8$. The same oscillations are present in electron free energy and specific heat. We find that the amplitude of thermodynamic oscillations drastically increases by changing the magnitude of dimerizing potential towards$ V \sim t$, thus adding an important contribution to the set of already known oscillatory mechanisms.

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