Electronic structure of random copolymers

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The electronic structure of random copolymers (RCP) is theoretically investigated by the single-site coherent potential approximation. The results are also compared with those by the band calculation for the corresponding ordered system. In the A1 -xBx binary RCP, a strong reduction in the system band gap (Eg(A1-xBx)) is found in the dilute B region when the system has the relation of Eg(A)>Eg(B). This dependence is caused by the asymmetric quenching in the density-of-states (DOS) singularity at the band-edge states. The gap-opening mechanism and the asymmetric quenching are discussed by focusing on the role of the spatial dimension on the electronic structure of the random system, and the theoretical treatment is finally applied to the calculation of the joint DOS for the Si-Ge RCP system.

Original languageEnglish
Pages (from-to)323-337
Number of pages15
JournalJournal of Mathematical Chemistry
Volume15
Issue number1
DOIs
Publication statusPublished - 1994 Dec
Externally publishedYes

Fingerprint

Copolymer
Electronic Structure
Electronic structure
Copolymers
Quenching
Density of States
SiGe
Random Systems
Energy gap
Band Gap
Singularity
Binary
Approximation

ASJC Scopus subject areas

  • Applied Mathematics
  • Chemistry(all)

Cite this

Electronic structure of random copolymers. / Takeda, Kyozaburo.

In: Journal of Mathematical Chemistry, Vol. 15, No. 1, 12.1994, p. 323-337.

Research output: Contribution to journalArticle

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