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

Yasuhiro Tanaka, Kenji Yonemitsu

研究成果: Article

2 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号124704
ジャーナルjournal of the physical society of japan
83
12
DOI
出版ステータスPublished - 2014 12 15
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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