Built-in electric field effect on cyclotron mass of magnetopolarons in a wurtzite InxGa1-xN/GaN quantum well

doi:10.1088/1674-1056/21/10/107103

中国物理B ›› 2012, Vol. 21 ›› Issue (10): 107103-107103.doi: 10.1088/1674-1056/21/10/107103

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

Built-in electric field effect on cyclotron mass of magnetopolarons in a wurtzite In_xGa_1-xN/GaN quantum well

赵凤岐, 咏梅

a College of Physics and Electronic Information, Inner Mongolia Normal University, Inner Mongolia KeyLaboratory for Physics and Chemistry of Functional Materials, Hohhot 010022, China;
b Division of Science and Technology, Inner Mongolia Normal University, Hohhot 010022, China

收稿日期:2012-02-02 修回日期:2012-04-02 出版日期:2012-09-01 发布日期:2012-09-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10964007) and the Natural Science Foundation of Inner Mongolia, China (Grant No. 2009MS0110).

Built-in electric field effect on cyclotron mass of magnetopolarons in a wurtzite In_xGa_1-xN/GaN quantum well

Zhao Feng-Qi (赵凤岐), Yong Mei (咏梅)

a College of Physics and Electronic Information, Inner Mongolia Normal University, Inner Mongolia KeyLaboratory for Physics and Chemistry of Functional Materials, Hohhot 010022, China;
b Division of Science and Technology, Inner Mongolia Normal University, Hohhot 010022, China

Received:2012-02-02 Revised:2012-04-02 Online:2012-09-01 Published:2012-09-01
Contact: Zhao Feng-Qi E-mail:fqzhao@imnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10964007) and the Natural Science Foundation of Inner Mongolia, China (Grant No. 2009MS0110).

摘要/Abstract

摘要： The cyclotron mass of magnetopolarons in wurtzite In_xGa_1-xN/GaN quantum well is studied in the presence of an external magnetic field by using the Larsen perturbation method. The effects of the built-in electric field and different phonon modes including interface, confined and half-space phonon modes are considered in our calculation. The results for a zinc-blende quantum well are also given for comparison. It is found that the main contribution to the transition energy comes from half-space and interface phonon modes when the well width is very small while the confined modes play a more important role in a wider well due to the location of the electron wave function. As the well width increases, the cyclotron mass of magnetopolarons first increases to a maximum and then decreases either with or without the built-in electric field in the wurtzite structure and the built-in electric field slightly reduces the cyclotron mass. The variation of cyclotron mass in a zinc-blende structure is similar to that in a wurtzite structure. With the increase of external magnetic field, the cyclotron mass of polarons almost linearly increases. The cyclotron frequency of magnetopolarons is also discussed.

关键词: wurtzite quantum well, built-in electric field, magnetopolaron, cyclotron mass

Abstract: The cyclotron mass of magnetopolarons in wurtzite In_xGa_1-xN/GaN quantum well is studied in the presence of an external magnetic field by using the Larsen perturbation method. The effects of the built-in electric field and different phonon modes including interface, confined and half-space phonon modes are considered in our calculation. The results for a zinc-blende quantum well are also given for comparison. It is found that the main contribution to the transition energy comes from half-space and interface phonon modes when the well width is very small while the confined modes play a more important role in a wider well due to the location of the electron wave function. As the well width increases, the cyclotron mass of magnetopolarons first increases to a maximum and then decreases either with or without the built-in electric field in the wurtzite structure and the built-in electric field slightly reduces the cyclotron mass. The variation of cyclotron mass in a zinc-blende structure is similar to that in a wurtzite structure. With the increase of external magnetic field, the cyclotron mass of polarons almost linearly increases. The cyclotron frequency of magnetopolarons is also discussed.

Key words: wurtzite quantum well, built-in electric field, magnetopolaron, cyclotron mass

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

71.38.-k

73.21.Fg (Quantum wells)

赵凤岐, 咏梅. Built-in electric field effect on cyclotron mass of magnetopolarons in a wurtzite In_xGa_1-xN/GaN quantum well[J]. 中国物理B, 2012, 21(10): 107103-107103.

Zhao Feng-Qi (赵凤岐), Yong Mei (咏梅). Built-in electric field effect on cyclotron mass of magnetopolarons in a wurtzite In_xGa_1-xN/GaN quantum well[J]. Chin. Phys. B, 2012, 21(10): 107103-107103.

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Built-in electric field effect on cyclotron mass of magnetopolarons in a wurtzite In_xGa_1-xN/GaN quantum well

Built-in electric field effect on cyclotron mass of magnetopolarons in a wurtzite In_xGa_1-xN/GaN quantum well

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