Unified properties of a weakly interacting Fermi gas in a weak magnetic field

作者：Men FuDian^*; Liu Hui; Zhu Houyu

来源：Science in China - Series G: Physics Mechanics and Astronomy , 2008, 51(8): 1072-1078.

DOI：10.1007/s11433-008-0112-8

• Fermi gas
• magnetic field
• interaction
• statistical property

When the orbital motion and the spin motion of particles were considered simultaneously, the thermodynamic potential function of a weakly interacting Fermi gas in a weak magnetic field was derived using the thermodynamics method. Based on the derived expression, the analytical expressions of energy, heat capacity, chemical potential, susceptibility and stability conditions of the system were given, and the effects of the interparticle interactions as well as the magnetic field on the properties of the system were analyzed. It was shown that the magnetic field always causes energy and stability to decrease, while the chemical potential of the system to increase. The repulsive (attractive) interactions always increase (decrease) energy and stability, but decrease (increase) the chemical potential and paramagnetism. The repulsive (attractive) interactions decrease (increase) heat capacity of the system at high temperatures but increase (decrease) it at low temperatures.

• 出版日期2008-8
• 单位中国石油大学（华东）