On Nearest-Neighbor Hopping Transport in the Presence of Hubbard Interaction

Autor:	O. Bleibaum, V. V. Bryksin, Harald Böttger
Rok vydání:	2002
Předmět:	Condensed matter physics Chemistry Mode (statistics) Relaxation (physics) Interaction strength Condensed Matter::Strongly Correlated Electrons Diffusion (business) Condensed Matter Physics Variable-range hopping Electronic Optical and Magnetic Materials k-nearest neighbors algorithm
Zdroj:	physica status solidi (b). 230:177-181
ISSN:	1521-3951 0370-1972
Popis:	We argue that hopping transport in the presence of Hubbard interaction is affected by a relaxation mode. The relaxation mode governs the diffusion and the decay of excitations of the system. We discuss the new problems that result from the consideration of the relaxation mode and outline first results of an effective medium formulation, which takes into account both the diffusion mode and the relaxation mode on equal footing. Doing so, we restrict the consideration to the nearest-neighbor hopping (NNH) regime. Our calculation shows that the hopping length for excitations is strongly affected by the relaxation. The relaxation decreases the hopping length of excitations. The reduction of the hopping length depends on the Hubbard interaction strength and on the filling of the system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6e101d1aee0fea8d741b63f5874ac80e https://doi.org/10.1002/1521-3951(200203)230:1<177::aid-pssb177>3.0.co Zobrazit plný text záznamu Plný text