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Competition between paramagnetism and diamagnetism in charged Fermi gases

Authors
  • Jian, Xiaoling
  • Qin, Jihong
  • Gu, Qiang
Type
Published Article
Publication Date
Jun 26, 2010
Submission Date
Jun 26, 2010
Identifiers
DOI: 10.1016/j.physleta.2010.04.027
Source
arXiv
License
Yellow
External links

Abstract

The charged Fermi gas with a small Lande-factor $g$ is expected to be diamagnetic, while that with a larger $g$ could be paramagnetic. We calculate the critical value of the $g$-factor which separates the dia- and para-magnetic regions. In the weak-field limit, $g_{c}$ has the same value both at high and low temperatures, $g_{c}=1/\sqrt{12}$. Nevertheless, $g_{c}$ increases with the temperature reducing in finite magnetic fields. We also compare the $g_{c}$ value of Fermi gases with those of Boltzmann and Bose gases, supposing the particle has three Zeeman levels $\sigma=\pm1, 0$, and find that $g_{c}$ of Bose and Fermi gases is larger and smaller than that of Boltzmann gases, respectively.

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