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Effect of strain on the excitonic polarization in graphene ribbons
Author(s) -
Peng Feng,
Wang Yatao
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201248180
Subject(s) - exciton , polarization (electrochemistry) , condensed matter physics , bosonization , biexciton , wave vector , physics , linear polarization , materials science , quantum mechanics , chemistry , laser , fermion
We study the coherent polarization of excitons in strained graphene ribbons using a bosonization scheme. Within linear elastic theory and a tight‐binding approach, we observe that strain can generate a marked influence on the coherent polarization of excitons and even effectively enhance polarization of excitons on certain conditions. We find that the polarization direction of the positive‐wavevector excitons is opposite to that of the negative‐wavevector excitons under high strain. We explain the micromechanism of generating these phenomena.