Shape of the tunneling conductance peaks for coupled electron waveguides

被引：8

作者：

Governale, M ^{[1
]}

Macucci, M ^{[1
]}

Pellegrini, B ^{[1
]}

机构：

[1] Univ Pisa, Dipartimento Ingn Informaz Elettron Informat Tele, I-56126 Pisa, Italy

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.62.4557

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the behavior of the tunneling conductance between two coupled electron waveguides with a numerical model for a wide range of values of the coupling length. We have then focused on the study of the condition of short coupling length, by means of a semianalytical model, which has enabled us to explain in detail the width and shape of the conductance peaks, in terms of the characteristics of the barrier dividing the two waveguides and of the coupling length. Conclusions are drawn that can provide new explanations for existing measurements and that prompt renewed experimental activities.

引用

页码：4557 / 4566

页数：10

共 20 条

[1]

BUTTIKER M, 1988, IBM J RES DEV, V32, P306

[2] THEORY OF THE CONDUCTANCE OF PARALLEL BALLISTIC CONSTRICTIONS [J].

CASTANO, E ;

KIRCZENOW, G .

PHYSICAL REVIEW B, 1990, 41 (08) :5055-5060

[3] MODELING THE PATTERNED 2-DIMENSIONAL ELECTRON-GAS - ELECTROSTATICS [J].

DAVIES, JH ;

LARKIN, IA ;

SUKHORUKOV, EV .

JOURNAL OF APPLIED PHYSICS, 1995, 77 (09) :4504-4512

[4] QUANTUM FIELD-EFFECT DIRECTIONAL COUPLER [J].

DELALAMO, JA ;

EUGSTER, CC .

APPLIED PHYSICS LETTERS, 1990, 56 (01) :78-80

[5] 1D-TO-2D TUNNELING IN ELECTRON WAVE-GUIDES [J].

EUGSTER, CC ;

DELALAMO, JA ;

MELLOCH, MR ;

ROOKS, MJ .

PHYSICAL REVIEW B, 1993, 48 (20) :15057-15067

[6] ONE-DIMENSIONAL TO ONE-DIMENSIONAL TUNNELING BETWEEN ELECTRON WAVE-GUIDES [J].

EUGSTER, CC ;

DELALAMO, JA ;

ROOKS, MJ ;

MELLOCH, MR .

APPLIED PHYSICS LETTERS, 1994, 64 (23) :3157-3159

[7]

EUGSTER CC, 1993, THESIS MIT

[8] Finite element solution of electron waveguide discontinuities and its application to quantum field effect directional couplers [J].

Gotoh, H ;

Koshiba, M ;

Kaji, R .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1996, 32 (10) :1826-1832

[9] SPATIAL VARIATION OF CURRENTS AND FIELDS DUE TO LOCALIZED SCATTERERS IN METALLIC CONDUCTION [J].

LANDAUER, R .

IBM JOURNAL OF RESEARCH AND DEVELOPMENT, 1957, 1 (03) :223-231

[10] CONDITIONS FOR THE ADDITIVITY OF CONDUCTANCE FOR PARALLEL MESOSCOPIC CONSTRICTIONS [J].

MACUCCI, M ;

HESS, K .

PHYSICAL REVIEW B, 1992, 46 (23) :15357-15364

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