4.6 Article

Self-trapping of polarons with off-diagonal coupling

Journal

PHYSICAL REVIEW B
Volume 79, Issue 15, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.155112

Keywords

phonon-exciton interactions; polarons; quantum entanglement; self-focusing; wave functions

Funding

  1. Singapore Ministry of Education through the Academic Research Fund (Tier2) [T207B1214]

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A variational polaron wave function pioneered by Toyozawa is utilized to elucidate exciton-phonon correlations in a generalized Holstein Hamiltonian in the simultaneous presence of diagonal and off-diagonal exciton-phonon couplings. We show that a simple analysis of quantum entanglement between excitonic and phononic degrees of freedom allows one to effectively characterize both the small- and large-polaron regimes as well as the crossover in between.

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