Chin. Phys. Lett.  2014, Vol. 31 Issue (1): 017103    DOI: 10.1088/0256-307X/31/1/017103
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
A New Perspective to Study the Correlation Effect of the Three-Dimensional Electron Gas
YU Zhi-Ming, LIU Yu-Liang**
Department of Physics, Renmin University of China, Beijing 100872
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YU Zhi-Ming, LIU Yu-Liang 2014 Chin. Phys. Lett. 31 017103
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Abstract The phase field, which originates from the electronic interaction, plays an important role in describing a strongly correlated system in one dimension. However, in higher dimensions the effect of phase field cannot be obviously understood. With the eigenfunctional theory, we calculate the pair distribution function of the three-dimensional electron gas to study the relationship between the phase field and the electronic correlation effect and show that at zero temperature the correlation effect of the electrons is mainly dominated by the phase fluctuation, which is produced by the electronic interaction. We also discuss the failure of random phase approximation in studying the correlation function when the correlation effect is strong in the view of the phase field.
Received: 30 May 2013      Published: 28 January 2014
PACS:  71.10.Ca (Electron gas, Fermi gas)  
  71.27.+a (Strongly correlated electron systems; heavy fermions)  
  71.10.-w (Theories and models of many-electron systems)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/31/1/017103       OR      https://cpl.iphy.ac.cn/Y2014/V31/I1/017103
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YU Zhi-Ming
LIU Yu-Liang
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