中国物理B ›› 2017, Vol. 26 ›› Issue (9): 97103-097103.doi: 10.1088/1674-1056/26/9/097103

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetpolaron effect in two-dimensional anisotropic parabolic quantum dot in a perpendicular magnetic field

Kang-Kang Ju(居康康), CuiXian Guo(郭翠仙), Xiao-Yin Pan(潘孝胤)   

  1. Department of Physics, Ningbo University, Ningbo 315211, China
  • 收稿日期:2017-05-03 修回日期:2017-06-06 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: Xiao-Yin Pan E-mail:panxiaoyin@nbu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11375090) and the K. C. Wong Magna Foundation in Ningbo University, China.

Magnetpolaron effect in two-dimensional anisotropic parabolic quantum dot in a perpendicular magnetic field

Kang-Kang Ju(居康康), CuiXian Guo(郭翠仙), Xiao-Yin Pan(潘孝胤)   

  1. Department of Physics, Ningbo University, Ningbo 315211, China
  • Received:2017-05-03 Revised:2017-06-06 Online:2017-09-05 Published:2017-09-05
  • Contact: Xiao-Yin Pan E-mail:panxiaoyin@nbu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11375090) and the K. C. Wong Magna Foundation in Ningbo University, China.

摘要: We study the two-dimensional weak-coupling Fröhlich polaron in a completely anisotropic quantum dot in a perpendicular magnetic field. By performing a unitary transformation, we first transform the Hamiltonian into a new one which describes an anisotropic harmonic oscillator with new mass and trapping frequencies interacting with the same phonon bath but with different interaction form and strength. Then employing the second-order Rayleigh-Schrödinger perturbation theory, we obtain the polaron correction to the ground-state energy. The magnetic field and anisotropic effects on the polaron correction to the ground-state energy are discussed.

关键词: Frö, hlich polaron, anisotropic quantum dot, magnetic field, ground-state energy

Abstract: We study the two-dimensional weak-coupling Fröhlich polaron in a completely anisotropic quantum dot in a perpendicular magnetic field. By performing a unitary transformation, we first transform the Hamiltonian into a new one which describes an anisotropic harmonic oscillator with new mass and trapping frequencies interacting with the same phonon bath but with different interaction form and strength. Then employing the second-order Rayleigh-Schrödinger perturbation theory, we obtain the polaron correction to the ground-state energy. The magnetic field and anisotropic effects on the polaron correction to the ground-state energy are discussed.

Key words: Fröhlich polaron, anisotropic quantum dot, magnetic field, ground-state energy

中图分类号:  (Polarons and electron-phonon interactions)

  • 71.38.-k
71.38.Fp (Large or Fr?hlich polarons) 63.20.K- (Phonon interactions) 73.21.La (Quantum dots)