Isobaric expansion coefficient and isothermal compressibility for a finite-size ideal Fermi gas system |
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Affiliation: | 1. Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, People''s Republic of China;2. School of Mechanical & Electronic Engineering, Sanming University, Sanming 365004, People''s Republic of China |
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Abstract: | Due to quantum size effects (QSEs), the isobaric thermal expansion coefficient and isothermal compressibility well defined for macroscopic systems are invalid for finite-size systems. The two parameters are redefined and calculated for a finite-size ideal Fermi gas confined in a rectangular container. It is found that the isobaric thermal expansion coefficient and isothermal compressibility are generally anisotropic, i.e., they are generally different in different directions. Moreover, it is found the thermal expansion coefficient may be negative in some directions under the condition that the pressures in all directions are kept constant. |
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Keywords: | Quantum size effect Fermi gas Isobaric expansion coefficient Isothermal compressibility |
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