Bistable molecular conductors with a field-switchable dipole group

被引：63

作者：

Kornilovitch, PE ^{[1
]}

Bratkovsky, AM ^{[1
]}

Williams, RS ^{[1
]}

机构：

[1] Hewlett Packard Labs, Palo Alto, CA 94304 USA

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.66.245413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A class of bistable "stator-rotor" molecules is proposed, where a stationary bridge (stator) connects the two electrodes and facilitates electron transport between them. The rotor part, which has a large dipole moment, is attached to an atom of the stator via a single sigma bond. Hydrogen bonds formed between the rotor and stator make the symmetric orientation of the dipole unstable. The rotor has two potential minima with equal energy for rotation about the sigma bond. The dipole orientation, which determines the conduction state of the molecule, can be switched by an external electric field that changes the relative energy of the two potential minima. Both orientations of the rotor correspond to asymmetric current-voltage characteristics that are the reverse of each other, so they are distinguishable electrically. Such bistable stator-rotor molecules could potentially be used as parts of molecular electronic devices.

引用

页码：1 / 7

页数：7

共 22 条

[11]

Harrison W. A., 1989, ELECT STRUCTURE PROP

[12]

Imry Y., 1997, INTRO MESOSCOPIC PHY

[13] Current rectification by molecules with asymmetric tunneling barriers [J].