THEORY OF THERMODYNAMIC MAGNETIC OSCILLATIONS IN QUASI-ONE-DIMENSIONAL CONDUCTORS

The second-order correction to the free energy due to the interaction between electrons is calculated for a quasi-one-dimensional conductor exposed to a magnetic field perpendicular to the chains. It is found that specific heat, magnetization, and torque oscillate when the magnetic field is rotated in the plane perpendicular to the chains or when the magnitude of magnetic field is changed. This new mechanism of thermodynamic magnetic oscillations in metals, which is not related to the presence of any closed electron orbits, is applied to explain behavior of the organic conductor (TMTSF)2ClO4.