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Quantum diffusion in bilateral doped chains

Quantum diffusion in bilateral doped chains
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摘要 In this paper, we quantitatively study the quantum diffusion in a bilateral doped chain, which is randomly doped on both sides. A tight binding approximation and quantum dynamics are used to calculate the three electronic characteristics: autocorrelation function C(t), the mean square displacement d(t) and the participation number P(E) in different doping situations. The results show that the quantum diffusion is more sensitive to the small ratio of doping than to the big one, there exists a critical doping ratio qo, and C(t), d(t) and P(E) have different variation trends on different sides of qo. For the self-doped chain, the doped atoms have tremendous influence on the central states of P(E), which causes the electronic states distributed in other energy bands to aggregate to the central band (E = 0) and form quasi-mobility edges there. All of the doped systems experience an incomplete transition of metal-semiconductor-metal. In this paper, we quantitatively study the quantum diffusion in a bilateral doped chain, which is randomly doped on both sides. A tight binding approximation and quantum dynamics are used to calculate the three electronic characteristics: autocorrelation function C(t), the mean square displacement d(t) and the participation number P(E) in different doping situations. The results show that the quantum diffusion is more sensitive to the small ratio of doping than to the big one, there exists a critical doping ratio qo, and C(t), d(t) and P(E) have different variation trends on different sides of qo. For the self-doped chain, the doped atoms have tremendous influence on the central states of P(E), which causes the electronic states distributed in other energy bands to aggregate to the central band (E = 0) and form quasi-mobility edges there. All of the doped systems experience an incomplete transition of metal-semiconductor-metal.
机构地区 Department of Physics
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第7期345-350,共6页 中国物理B(英文版)
基金 Project supported by the National Natural Science Foundation of China (Grant Nos.10974166 and 10774127) the Cultivation Fund of the Key Scientific and Technical Innovation Project,Ministry of Education of China (Grant No.708068) the Research Foundation of Education Bureau of Hunan Province of China (Grant No.09A094)
关键词 quantum diffusion doped chain metal semiconductor transition quantum diffusion, doped chain, metal semiconductor transition
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参考文献36

  • 1Parker A J, Childs P A and Palmer R E 2002 Microelec- tron. Eng. 61 681.
  • 2Kim H, Lee H B R and Maeng W J 2009 Thin Solid Films 517 2563.
  • 3Isacsson A, Jonsson L M, Kinaret J M and Jonson M 2008 Phys. Rev. B 77 035423.
  • 4Ariza M P and Ortiz M 2010 J. Mech. Phys. Solids 58 710.
  • 5Adam S, Hwang E H and Das Sarma S 2008 Physica E 40 1022.
  • 6Popov V N 2004 Mat. Sci. Eng. R 43(3) 61.
  • 7Spitalsky Z, Tasis D, Papagelis K and Galiotis C 2010 Prog. Polym. Sci. 35 357.
  • 8Zhang J M, Du X J, Wang S F and Xu K W 2009 Chin. Phys. B 18 5468.
  • 9Willatzen M, Melnik R V N, Galeriu C and Lew Yan Voon L C 2004 Math. Comput. Simulat. 65 385.
  • 10Tang W H, Fu X L, Zhang Z Y and Li L H 2006 Chin. Phys. B 15 0773.

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