Work

Excitons in the One-Dimensional Hubbard Model: A Real-Time Study

Year: 2008

Type: article

Abstract: We study the real-time dynamics of a hole and doubly occupied site pair, namely, a holon and a doublon, in a 1D Hubbard insulator with on-site and nearest-neighbor Coulomb repulsion. Our analysis shows that the pair is long-lived and the expected decay mechanism to underlying spin excitations is actually inefficient. For a nonzero intersite Coulomb repulsion, we observe that part of the wave function remains in a bound state. Our study also provides insight on the holon-doublon propagation in real space. Because of the one-dimensional nature of the problem, these particles move in opposite directions even in the absence of an applied electric field. The potential relevance of our results to solar cell applications is discussed.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.100.166403

Authors: K. A. Al-Hassanieh, F. A. Reboredo, A. E. Feiguin, I. González, E. Dagotto

Institutions: Los Alamos National Laboratory, Oak Ridge National Laboratory, University of California, Santa Barbara, University of Maryland, College Park, University of Tennessee at Knoxville

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1983684409

FWCI: 1.85

Cites: 32

Cited by: 66

Related to: 10