Roles of potential gradient and electrode bandwidth on negative differential resistance in one-dimensional band insulator

Yasuhiro Tanaka, Kenji Yonemitsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A negative differential resistance (NDR) in a one-dimensional band insulator attached to electrodes is investigated. We systematically examine the effects of an electrode bandwidth and a potential distribution inside the insulator on current-voltage characteristics. We show that, in uncorrelated systems, the NDR is generally caused by a linear potential gradient as well as by a finite electrode bandwidth. In particular, the former reduces the effective bandwidth of the insulator for elastic tunneling by tilting its energy band, so that it brings about the NDR even in the limit of large electrode bandwidth.

Original languageEnglish
Article number124704
Journaljournal of the physical society of japan
Volume83
Issue number12
DOIs
Publication statusPublished - 2014 Dec 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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