Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 75, Issue 1, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.75.011003
Keywords
polaron; exciton-polaron; self-trapping; high T-c
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We present recent advances in understanding of the ground and excited states of the electron-phonon coupled systems obtained by novel methods of Diagrammatic Monte Carlo and Stochastic Optimization, which enable the approximation-free calculation of Matsubara Green function in imaginary times and perform unbiased analytic continuation to real frequencies. We analyze Rashba-Pekar exciton-polaron as a classic example of a system with self-trapping crossover and demonstrate basic features of the phenomenon. Analysis of unconventional self-trapping cases, such as Jahn-Teller driven crossover in one-dimensional systems and magnon-assisted localization in cuprates, is presented. Results on the optical conductivity of the Frohlich polaron are also discussed.
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