Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/74794
Título: | Perturbative approach to the polaron shift of excitons in transition metal dichalcogenides |
Outro(s) título(s): | A perturbative approach to the polaron shift of excitons in transition metal dichalcogeniedes |
Autor(es): | Henriques, J. C. G. Peres, N. M. R. |
Data: | Abr-2021 |
Editora: | American Physical Society |
Revista: | Physical Review B |
Resumo(s): | In this Letter, we study the effect of phonons on the position of the 1s excitonic resonance of the fundamental absorption transition line in two-dimensional transition metal dichalcogenides. We apply our theory to WS2, a two-dimensional material where the shift in the absorption peak position has been measured as a function of temperature. The theory is composed of two ingredients only: (i) the effect of longitudinal optical phonons on the absorption peak position, which we describe with second-order perturbation theory, and (ii) the effect of phonons on the value of the single-particle energy gap, which we describe with the Huang Rhys model. Our results show excellent agreement with the experimentally measured shift of the absorption peak with the temperature. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/74794 |
DOI: | 10.1103/PhysRevB.103.L161402 |
ISSN: | 2469-9950 |
Versão da editora: | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.103.L161402 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - CEP - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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polaron_shift.pdf | 1,48 MB | Adobe PDF | Ver/Abrir |