Chin. Phys. Lett.  2001, Vol. 18 Issue (4): 592-594    DOI:
Original Articles |
Statistic Ensemble Theory of Small Superconducting Grains
CHEN Zhi-Qian1,2;ZHENG Ren-Rong2,3
1Department of Physics, Southwest China Normal University, Chongqing 400715 2Department of Physics, Suzhou University, Suzhou 215006 3Department of Physics, Shanghai Teachers’ University, Shanghai 200234
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CHEN Zhi-Qian, ZHENG Ren-Rong 2001 Chin. Phys. Lett. 18 592-594
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Abstract We apply random matrix theory to small metallic grains in different spin-states of S=0, 1/2, 1, 3/2, 2, 5/2, ..., and find that there exist theoretical critical level spacings dc at which the superconductivity would break down. We also find that the higher the spin-state, the smaller the critical level spacing, and for the state of S = 0 there actually exists the superconducting enhancement.

Keywords: 74.80.Bj      74.20.Fg      71.23.-k     
Published: 01 April 2001
PACS:  74.80.Bj  
  74.20.Fg (BCS theory and its development)  
  71.23.-k (Electronic structure of disordered solids)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2001/V18/I4/0592
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