Calculations of the acoustoelectric current in a quantum well by using a quantum kinetic equation

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• 作者：Nguyen Quang Bau (1)
  Nguyen Van Hieu (1)
  Nguyen Vu Nhan (1)
  
• 关键词：Quantum well ; Quantum acoustoelectric current ; Electron ; external acoustic wave interaction ; Electron ; internal phonons scattering ; Quantum kinetic equation
• 刊名：Journal of the Korean Physical Society
• 出版年：2012
• 出版时间：December 2012
• 年：2012
• 卷：61
• 期：12
• 页码：2026-2031
• 全文大小：242KB
• 参考文献：1. Y. Zhang, K. Suenaga, C. Colliex and S. Iijima, Science 281, 973 (1998). CrossRef
  2. S. Schmitt-Rink, D. S. Chemla and D. A. B. Miller, Adv. Phys. 38, 89 (1989). CrossRef
  3. T. C. Phong and N. Q. Bau, J. Korean Phys. Soc. 42, 647 (2003).
  4. G. M. Shmelev, L. A. Chaikovskii and N. Q. Bau, Sov. Phys. Semicond. 12, 1932 (1978).
  5. N. Q. Bau and T. C. Phong, J. Phys. Soc. Jpn. 67, 3875 (1998). CrossRef
  6. V. V. Pavlovich and E. M. Epshtein, Sov. Phys. Semicond. 11, 809 (1977).
  7. N. Q. Bau, D. M. Hung and N. B. Ngoc, J. Korean Phys. Soc. 54, 765 (2009). CrossRef
  8. N. Q. Bau and H. D. Trien, J. Korean Phys. Soc. 56, 120 (2010). CrossRef
  9. R. H. Parmenter, Phys. Rev. B 89, 990 (1953). CrossRef
  10. G Johri and H. N. Spector, Phys. Rev. B 15, 4955 (1959). CrossRef
  11. M. Kogami and S. Tanaka, J. Phys. Soc. Jpn. 30, 775 (1970). CrossRef
  12. S. G. Eckstein, J. Appl. Phys. 35, 2702 (1964). CrossRef
  13. E. M. Epshtein and V. Gulyaev Yu, Sov. Phys. Solid State. 9, 288 (1967).
  14. G. Weinreich, T. M. Sanders and H. G. White, Phys. Rev. B 1, 114 (1959).
  15. G. Johri and H. N. Spector, Phys. Rev. B 15, 4955 (1977). CrossRef
  16. S. Y. Mensah and F. K. A. Allotey, J. Phys. Condens. Matter. 12, 5225 (2000). CrossRef
  17. S. Y. Mensah / et al., J. Phys. Superlatt. Micros. 37, 87 (2005). CrossRef
  18. N. Q. Bau, N. V. Hieu, N. T. Thuy and T. C. Phong, Coms. Phys.Vn. 3, 249 (2010).
  19. J. M. Shilton, D. R. Mace and V. I. Talyanskii, J. Phys Condens. Matter. 8, 337 (1996). CrossRef
  20. O. E. Wohlman, Y. Levinson and Yu. M. Galperin, Phys. Rev. B 62, 7283 (2000). CrossRef
  21. Y. Levinson, O. Entin-Wohlman and P. Wolfle, J. Appl. Phys. Lett. 85, 635 (2000).
  22. I. A. Kokurin and V. A. Margulis, J. Exp. Theor Phys. 1, 206 (2007). CrossRef
  23. J. Cunningham, M. Pepper and V. I. Talyanskii, J. Appl. Phys. Lett. 86, 152105 (2005). CrossRef
  24. M. R. Astley, M. Kataoka and C. J. B. Ford, J. Appl. Phys. 103, 096102 (2008). CrossRef
  25. M. Tabib-Azar and P. Das, J. Appl. Phys. Lett. 51, 436 (1987). CrossRef
  26. J. M. Shilton, D. R. Mace, V. I. Talyanskii, M. Y. Simmons, M. Pepper, A. C. Churchill and D. A. Ritchie, J. Phys. Condens. Matter. 7, 7675 (1995). CrossRef
  27. N. V. Zavaritskii, M. I. Kaganov and Sh. T. Mevlyut, JETP Lett. 28, 205 (1978).
  
• 作者单位：Nguyen Quang Bau (1)
  Nguyen Van Hieu (1)
  Nguyen Vu Nhan (1)
  
  1. Faculty of Physics, Hanoi University of Science, Vietnam National University, 334-Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
  
• ISSN：1976-8524

文摘

An analytic expression for the acoustoelectric current (AC) j ac induced by electron-external acoustic wave interactions and electron-internal acoustic wave (internal phonons) scattering in a quantum well (QW) is calculated by using the quantum kinetic equation for electrons. The physical problem is investigated in the region ql ?1 (where q is the acoustic wave number and l is the electrons mean free path). The dependence of the AC j ac on the external acoustic wave frequency $\omega _{\vec q}$ , the width of the QW L and the temperature T for a specific QW of AlGaAs/GaAs/AlGaAs is achieved by using a numerical method. The computational results show that the dependence of the AC j ac on the temperature T, the external acoustic wave frequency $\omega _{\vec q}$ , the width of the QW L is non-monotonic and that the peaks can be attributed to transitions between mini-bands n ?n-/em>. The dependence of the AC j ac on the temperature T and the Fermi energy ?/em> F is obtained, and a maximum of the AC j ac for ?/em> F = 0.038 eV and $\omega _{\vec q} = 3 \times 10^{11} s^{ - 1}$ seen at T = 50 K, which agrees with the experimental results for AlGaAs/GaAs/AlGaAs QWs. All these results are compared with those for normal bulk semiconductors and superlattices to show the differences. Finally, the quantum theory of the acoustoelectric effect in a quantum well is newly developed.