TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES AROUND A POLARON WITH THE NEXT-NEAREST-NEIGHBOR HOPPING INTERACTIONS

doi:10.1088/1004-423X/4/7/003

中国物理B ›› 1995, Vol. 4 ›› Issue (7): 500-504.doi: 10.1088/1004-423X/4/7/003

TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES AROUND A POLARON WITH THE NEXT-NEAREST-NEIGHBOR HOPPING INTERACTIONS

李占杰, 姚凯伦

International Center of Materials Physics, Academia Sinica, Shenyang 110015, China; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China

收稿日期:1994-07-15 修回日期:1995-01-14 出版日期:1995-07-20 发布日期:1995-07-20
基金资助:
Project supported by the National Natural Science Foundation of China.

TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES AROUND A POLARON WITH THE NEXT-NEAREST-NEIGHBOR HOPPING INTERACTIONS

LI ZHAN-JIE (李占杰)^a, YAO KAI-LUN (姚凯伦)^b

^aInternational Center of Materials Physics, Academia Sinica, Shenyang 110015, China; ^b Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China

Received:1994-07-15 Revised:1995-01-14 Online:1995-07-20 Published:1995-07-20
Supported by:
Project supported by the National Natural Science Foundation of China.

摘要/Abstract

摘要： We have calculated the vibrational modes around a polaron to test the effects of the next-nearest-neighbor hopping interactions on the localized medes within a framework of the two-dimensional mode. The results show that: (1) For a negative polaron, eleven localized modes have been found, compared with ten modes obtained on a previous work without non-nearest neighbor hopping. (2) For a positive polaron, two additional localized modes occur. (3) The localization of localized modes are strengthened and their frequencies move after turning on the next-nearest-neighbor hopping interactions.

Abstract: We have calculated the vibrational modes around a polaron to test the effects of the next-nearest-neighbor hopping interactions on the localized medes within a framework of the two-dimensional mode. The results show that: (1) For a negative polaron, eleven localized modes have been found, compared with ten modes obtained on a previous work without non-nearest neighbor hopping. (2) For a positive polaron, two additional localized modes occur. (3) The localization of localized modes are strengthened and their frequencies move after turning on the next-nearest-neighbor hopping interactions.

中图分类号: (Localized modes)

63.20.Pw

71.38.-k (Polarons and electron-phonon interactions)

李占杰, 姚凯伦. TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES AROUND A POLARON WITH THE NEXT-NEAREST-NEIGHBOR HOPPING INTERACTIONS[J]. 中国物理B, 1995, 4(7): 500-504.

LI ZHAN-JIE (李占杰), YAO KAI-LUN (姚凯伦). TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES AROUND A POLARON WITH THE NEXT-NEAREST-NEIGHBOR HOPPING INTERACTIONS[J]. Acta Physica Sinica (Overseas Edition), 1995, 4(7): 500-504.

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TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES AROUND A POLARON WITH THE NEXT-NEAREST-NEIGHBOR HOPPING INTERACTIONS

TWO-DIMENSIONAL LOCALIZED VIBRATIONAL MODES AROUND A POLARON WITH THE NEXT-NEAREST-NEIGHBOR HOPPING INTERACTIONS

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