J. Phys. Soc. Jpn. 81, 013701 (2012) [4 Pages]
LETTERS

Relaxation Dynamics of Photocarriers in One-Dimensional Mott Insulators Coupled to Phonons

+ Affiliations
1Sendai National College of Technology, Sendai 989-3128, Japan2Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan3Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan4CREST, Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0075, Japan

We examine recombination processes of photocarriers in one-dimensional Mott insulators coupled to phonons. Performing density matrix renormalization group calculations, we find that, even for small electron–phonon coupling, many phonons are generated dynamically, which cause initial relaxation process after the irradiation. At the same time, spin–charge coupling coming from mixing of high- and low-energy states by the irradiation is suppressed. We discuss differences between Mott and band insulators in terms of relaxation dynamics.

©2012 The Physical Society of Japan

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