engleski

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

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=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 ~ t, thus adding an important contribution to the set of already known oscillatory mechanisms.

Bechgaard salts ; magnetic field ; magnetic oscillations ; thermodynamics ; anion ordering ; dimerization

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