Quantum inelastic conductance through molecular wires

被引：129

作者：

Ness, H ^{[1
]}

Fisher, AJ ^{[1
]}

机构：

[1] Univ London Univ Coll, Dept Phys & Astron, London WC1E 6BT, England

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 02期

基金：

欧盟地平线“2020”;

关键词：

D O I：

10.1103/PhysRevLett.83.452

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate nonperturbatively the inelastic effects on the conductance through a conjugated molecular-wire-metal heterojunction, including realistic electron-phonon coupling. We show that at subband-gap energies the current is dominated by quantum coherent transport of virtual polarons through the molecule. In this regime. the tunneling current is strongly increased relative to the case of elastic scattering. It is essential to describe the full quantum coherence of the polaron formation and transport in order to obtain correct physics. Our results are generally applicable to one-dimensional atomic or molecular wires.

引用

页码：452 / 455

页数：4

共 26 条

[1] EFFECT OF INELASTIC PROCESSES ON TUNNELING [J].

BONCA, J ;

TRUGMAN, SA .

PHYSICAL REVIEW LETTERS, 1995, 75 (13) :2566-2569

[2] Inelastic quantum transport [J].

Bonca, J ;

Trugman, SA .

PHYSICAL REVIEW LETTERS, 1997, 79 (24) :4874-4877

[3]

BOWLER DR, UNPUB

[4] The exciton binding energy in luminescent conjugated polymers [J].

Bredas, JL ;

Cornil, J ;

Heeger, AJ .

ADVANCED MATERIALS, 1996, 8 (05) :447-&

[5] Direct measurement of conjugated polymer electronic excitation energies using metal/polymer/metal structures [J].

Campbell, IH ;

Hagler, TW ;

Smith, DL ;

Ferraris, JP .

PHYSICAL REVIEW LETTERS, 1996, 76 (11) :1900-1903

[6] PHONON MODES IN THE SU-SCHRIEFFER-HEEGER MODEL FOR POLYACETYLENE [J].

CHAO, KA ;

WANG, YL .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1985, 18 (36) :1127-1132

[7] Contact injection into polymer light-emitting diodes [J].

Conwell, EM ;

Wu, MW .

APPLIED PHYSICS LETTERS, 1997, 70 (14) :1867-1869

[8] Current-voltage characteristics of self-assembled monolayers by scanning tunneling microscopy [J].

Datta, S ;

Tian, WD ;

Hong, SH ;

Reifenberger, R ;

Henderson, JI ;

Kubiak, CP .

PHYSICAL REVIEW LETTERS, 1997, 79 (13) :2530-2533

[9] Conductance of a finite missing hydrogen atomic line on Si(001)-(2 x 1)-H [J].

Doumergue, P ;

Pizzagalli, L ;

Joachim, C ;

Altibelli, A ;

Baratoff, A .

PHYSICAL REVIEW B, 1999, 59 (24) :15910-15916

[10] Carbon nanotube quantum resistors [J].

Frank, S ;

Poncharal, P ;

Wang, ZL ;

de Heer, WA .

SCIENCE, 1998, 280 (5370) :1744-1746

← 1 2 3 →