Off-diagonal carrier-phonon coupling and polaron transport
A method extending the Munn-Silbey approach has been applied to obtain the temperature dependence of transport properties of a generalized Holstein model incorporating simultaneous diagonal and off-diagonal carrier-phonon coupling. The Hamiltonian is partially diagonalized by a canonical transformat...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/95835 http://hdl.handle.net/10220/11360 |
| _version_ | 1811696663190831104 |
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| author | Ye, Jun Chen, Dongmeng Zhao, Yang |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Ye, Jun Chen, Dongmeng Zhao, Yang |
| author_sort | Ye, Jun |
| collection | NTU |
| description | A method extending the Munn-Silbey approach has been applied to obtain the temperature dependence of transport properties of a generalized Holstein model incorporating simultaneous diagonal and off-diagonal carrier-phonon coupling. The Hamiltonian is partially diagonalized by a canonical transformation, and optimal transformation coefficients are determined in a self-consistent manner. Effects of off-diagonal coupling on the optimal transformation coefficients and diffusion coefficients have been discussed in details. The off-diagonal coupling has been revealed as a localization factor as well as a transport mechanism. Moreover, momentum-space variation of the transformation coefficients are found to be responsible for enhanced transport due to off-diagonal coupling. |
| first_indexed | 2024-10-01T07:42:56Z |
| format | Journal Article |
| id | ntu-10356/95835 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:42:56Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/958352020-06-01T10:21:12Z Off-diagonal carrier-phonon coupling and polaron transport Ye, Jun Chen, Dongmeng Zhao, Yang School of Materials Science & Engineering A method extending the Munn-Silbey approach has been applied to obtain the temperature dependence of transport properties of a generalized Holstein model incorporating simultaneous diagonal and off-diagonal carrier-phonon coupling. The Hamiltonian is partially diagonalized by a canonical transformation, and optimal transformation coefficients are determined in a self-consistent manner. Effects of off-diagonal coupling on the optimal transformation coefficients and diffusion coefficients have been discussed in details. The off-diagonal coupling has been revealed as a localization factor as well as a transport mechanism. Moreover, momentum-space variation of the transformation coefficients are found to be responsible for enhanced transport due to off-diagonal coupling. 2013-07-15T02:25:21Z 2019-12-06T19:22:11Z 2013-07-15T02:25:21Z 2019-12-06T19:22:11Z 2012 2012 Journal Article Ye, J., Chen, D., & Zhao, Y. (2012). Off-diagonal carrier-phonon coupling and polaron transport. Journal of Physics: Conference Series, 338, 012018. 1742-6596 https://hdl.handle.net/10356/95835 http://hdl.handle.net/10220/11360 10.1088/1742-6596/338/1/012018 en Journal of physics : conference series © 2012 IOP Publishing Ltd. |
| spellingShingle | Ye, Jun Chen, Dongmeng Zhao, Yang Off-diagonal carrier-phonon coupling and polaron transport |
| title | Off-diagonal carrier-phonon coupling and polaron transport |
| title_full | Off-diagonal carrier-phonon coupling and polaron transport |
| title_fullStr | Off-diagonal carrier-phonon coupling and polaron transport |
| title_full_unstemmed | Off-diagonal carrier-phonon coupling and polaron transport |
| title_short | Off-diagonal carrier-phonon coupling and polaron transport |
| title_sort | off diagonal carrier phonon coupling and polaron transport |
| url | https://hdl.handle.net/10356/95835 http://hdl.handle.net/10220/11360 |
| work_keys_str_mv | AT yejun offdiagonalcarrierphononcouplingandpolarontransport AT chendongmeng offdiagonalcarrierphononcouplingandpolarontransport AT zhaoyang offdiagonalcarrierphononcouplingandpolarontransport |