Chin. Phys. Lett.  2002, Vol. 19 Issue (4): 550-552    DOI:
Original Articles |
Improved Coupled Reservoir Model for Inelastic Scattering in One-Dimensional Mesoscopic Metal Rings
DING Hong-Sheng;CHEN Geng-Hua;ZHAO Shi-Ping;YANG Qian-Sheng
Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
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DING Hong-Sheng, CHEN Geng-Hua, ZHAO Shi-Ping et al  2002 Chin. Phys. Lett. 19 550-552
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Abstract In order to strictly solve the problem of persistent current in one-dimensional mesoscopic metal rings, a model with a perfect ring coupled to an external reservoir by a four-lead junction is introduced to independently describe inelastic scattering. The junction is expressed by a 4 x 4 S-matrix, which is very similar to that used by Büttiker in sequential tunneling. Since the S-matrix is unitary, the current conservation keeps automatically. Since the quadruplet of the matrix problem can be reduced into two topologically separate doublets, it gives a simple and elegant method compared with the former description with 3 x 3 matrix.
Keywords: 73.23.Ra      75.20.En      73.23.-b     
Published: 01 April 2002
PACS:  73.23.Ra (Persistent currents)  
  75.20.En (Metals and alloys)  
  73.23.-b (Electronic transport in mesoscopic systems)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2002/V19/I4/0550
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DING Hong-Sheng
CHEN Geng-Hua
ZHAO Shi-Ping
YANG Qian-Sheng
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