Interference effects on the transport characteristics of a benzene single-electron transistor

被引：74

作者：

Darau, D. ^{[1
]}

Begemann, G. ^{[1
]}

Donarini, A. ^{[1
]}

Grifoni, M. ^{[1
]}

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93035 Regensburg, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 23期

关键词：

NANOTUBE QUANTUM DOTS; MOLECULE TRANSISTORS; ADDITION ENERGIES; CONDUCTANCE; DEPENDENCE; JUNCTIONS;

D O I：

10.1103/PhysRevB.79.235404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Interference effects strongly affect the transport characteristics of a benzene single-electron transistor, and for this reason we call it interference single-electron transistor (I-SET). We focus on the effects of degeneracies between many-body states of the isolated benzene. We show that the particular current blocking and selective conductance suppression occurring in the benzene I-SET are due to interference effects between the orbitally degenerate states. Further we study the impact of reduced symmetry due to anchor groups or potential drop over the molecule. We identify in the quasidegeneracy of the involved molecular states the necessary condition for the robustness of the results.

引用

页数：16

共 46 条

[1]

[Anonymous], 2005, Introducing Molecular Electronics

[2]

[Anonymous], 2005, Electronic and Optical Properties of Conjugated Polymers

[3] Symmetry fingerprints of a benzene single-electron transistor: Interplay between Coulomb interaction and orbital symmetry [J].

Begemann, Georg ;

Darau, Dana ;

Donarini, Andrea ;

Grifoni, Milena .

PHYSICAL REVIEW B, 2008, 77 (20)

[4] Symmetry fingerprints of a benzene single-electron transistor: Interplay between Coulomb interaction and orbital symmetry (vol 77, art no 201406, 2008) [J].

Begemann, Georg ;

Darau, Dana ;

Donarini, Andrea ;

Grifoni, Milena .

PHYSICAL REVIEW B, 2008, 78 (08)

[5]

Blum K., 1981, Density Matrix Theory and Applications

[6] Theory of transport through quantum-dot spin valves in the weak-coupling regime -: art. no. 195345 [J].

Braun, M ;

König, J ;

Martinek, J .

PHYSICAL REVIEW B, 2004, 70 (19) :1-12

[7]

Bruus H., 2004, Many-Body Quantum Theory in Condensed Matter Physics: An Introduction

[8] Controlling quantum transport through a single molecule [J].

Cardamone, David M. ;

Stafford, Charles A. ;

Mazumdar, Sumit .

NANO LETTERS, 2006, 6 (11) :2422-2426

[9] Vibrational excitations in single trimetal-molecule transistors [J].

Chae, DH ;

Berry, JF ;

Jung, S ;

Cotton, FA ;

Murillo, CA ;

Yao, Z .

NANO LETTERS, 2006, 6 (02) :165-168

[10] Mechanically adjustable and electrically gated single-molecule transistors [J].

Champagne, AR ;

Pasupathy, AN ;

Ralph, DC .

NANO LETTERS, 2005, 5 (02) :305-308

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