DENSITY OF STATES FOR AN ELECTRONIC SPECTRUM WITH A FORBIDDEN BAND

Autor:	CASIAN, Anatolie, SANDULEAC, Ionel
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	electrical conductivity quasi-one-dimensional materials organic compounds thermoelectric figure of merit thermoelectric converter Engineering (General). Civil engineering (General) TA1-2040 Electronic computers. Computer science QA75.5-76.95
Zdroj:	Journal of Engineering Science (Chişinău), Vol XXVII, Iss 3, Pp 33-37 (2020)
Druh dokumentu:	article
ISSN:	2587-3474 2587-3482
DOI:	10.5281/zenodo.3949645
Popis:	Quasi-one-dimensional organic crystals with high electrical conductivity at room temperature are prospect materials for thermoelectric applications. However, usually at some low temperature these materials manifest metal-dielectric transition of Peierls type. The aim of this paper is to calculate the density of electronic states and to show that the metal-dielectric transition is determined by the appearance of a forbidden band in the electronic spectrum exactly above the Fermi energy. While decreasing the temperature T, this forbidden band becomes larger and at some T prevails the value of k0T, where k0 is the Boltzmann constant and the carriers cannot be exited across the forbidden band. This temperature corresponds to metal-dielectric transition.
Databáze:	Directory of Open Access Journals
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