Dynamics of Uniform Quantum Gases, II: Magnetic Susceptibility

Details Dynamics of Uniform Quantum Gases, II: Magnetic Susceptibility Dynamics of Uniform Quantum Gases, II: Magnetic Susceptibility

2009-12-15

arxiv.org/abs/0912.2841v1

Physica A 389, 1173-1177 (2010)

Physics

Condensed Matter

Quantum Gases

Scientific paper

A general expression for temperature-dependent magnetic susceptibility of quantum gases composed of particles possessing both charge and spin degrees of freedom has been obtained within the framework of the generalized random-phase approximation. The conditions for the existence of dia-, para-, and ferro-magnetism have been analyzed in terms of a parameter involving single-particle charge and spin. The zero-temperature limit retrieves the expressions for the Landau and the Pauli susceptibilities for an electron gas. It is found for a Bose gas that on decreasing the temperature, it passes either through a diamagnetic incomplete Meissner-effect regime or through a paramagnetic-ferromagnetic large magnetization fluctuation regime before going to the Meissner phase at BEC critical temperature.

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