Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-12-15
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.
Bosse J.
Pathak K. N.
Singh Ghan Shyam
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