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Nonequilibrium dynamics of multiorbital correlated electron system under time-dependent electric fields
- Source :
- Phys. Status Solidi B 250, 553 (2013)
- Publication Year :
- 2013
-
Abstract
- To clarify a key role of orbital degrees of freedom in the response of the many-body electron state of correlated electrons to an external field, we investigate the real-time dynamics in an $e_{\rm g}$-orbital Hubbard model under applied electric fields by exploiting numerical techniques such as a time-dependent density-matrix renormalization group (DMRG) method. The ground state without applying an electric field is found to be an antiferromagnetic/ferro-orbital state. After we switch on an oscillating electric field, it gives rise to the creation of holon-doublon pairs when the frequency of the applied electric field exceeds a charge excitation gap. We argue that a pair-hopping process yields a dynamical deformation of the orbital configuration.<br />Comment: 4 pages, 4 figures, Proceedings of QCNP2012 (August 26-29, 2012, Dresden, Germany)
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Status Solidi B 250, 553 (2013)
- Publication Type :
- Report
- Accession number :
- edsarx.1310.8017
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1002/pssb.201200792