Study on Transverse Modes of a Quantum Point Contact under Magnetic Field

被引：0

作者：

Lee, Y. Y. ^{[1
]}

Ko, S. N. ^{[1
]}

Lee, M. S. ^{[1
]}

Moon, Y. H. ^{[1
]}

Bae, J. H. ^{[1
]}

Lee, S. J. ^{[1
]}

Son, M. H. ^{[1
]}

Oh, J. H. ^{[1
]}

Hwang, S. W. ^{[2
,3
]}

Ahn, D. ^{[1
]}

机构：

[1] Univ Seoul, Inst Quantum Informat Proc & Syst, Seoul, South Korea

[2] Korea Univ, Res Ctr Time Domain Nanofunct Devices, Seoul, South Korea

[3] Korea Univ, Sch Elect Engn, Seoul, South Korea

来源：

PHYSICS OF SEMICONDUCTORS: 30TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS | 2011年 / 1399卷

关键词：

quantum; point contact; green's function method; DIMENSIONAL ELECTRON-GAS;

D O I：

10.1063/1.3666408

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The quantization of conductance in units of 2e(2)/h of a quantum point contact (QPC) under low temperature, a narrow way formed in a two-dimensional electron gas (2DEG), has become a paradigm of mesoscopic physics. Devices defined by electrostatic gates in GaAs/AlGaAs 2DEGs display an extraordinary variety of spin related phenomena. Besides the usual conductance plateaus, QPCs show an extra plateau at similar to 0.7 (2e(2)/h), believed to arise from electron-electron interactions. These plateaus disappear as temperature rise. We present the experimental results of temperature dependent disappearance. Under magnetic fields plateaus shift due to the Landau level. The numerical results using Green's function approach is also presented.

引用

页数：2

共 5 条

[1] Green-function approach to transport through a gate-surrounded Si nanowire with impurity scattering [J].

Oh, Jung Hyun ;

Ahn, D. ;

Yu, Y. S. ;

Hwang, S. W. .

PHYSICAL REVIEW B, 2008, 77 (03)

[2] Fano factor reduction on the 0.7 conductance structure of a ballistic one-dimensional wire -: art. no. 116602 [J].

Roche, P ;

Ségala, J ;

Glattli, DC ;

Nicholls, JT ;

Pepper, M ;

Graham, AC ;

Thomas, KJ ;

Simmons, MY ;

Ritchie, DA .

PHYSICAL REVIEW LETTERS, 2004, 93 (11) :116602-1

[3] Possible spin polarization in a one-dimensional electron gas [J].

Thomas, KJ ;

Nicholls, JT ;

Simmons, MY ;

Pepper, M ;

Mace, DR ;

Ritchie, DA .

PHYSICAL REVIEW LETTERS, 1996, 77 (01) :135-138

[4] QUANTIZED CONDUCTANCE OF POINT CONTACTS IN A TWO-DIMENSIONAL ELECTRON-GAS [J].

VANWEES, BJ ;

VANHOUTEN, H ;

BEENAKKER, CWJ ;

WILLIAMSON, JG ;

KOUWENHOVEN, LP ;

VANDERMAREL, D ;

FOXON, CT .

PHYSICAL REVIEW LETTERS, 1988, 60 (09) :848-850

[5] ONE-DIMENSIONAL TRANSPORT AND THE QUANTIZATION OF THE BALLISTIC RESISTANCE [J].

WHARAM, DA ;

THORNTON, TJ ;

NEWBURY, R ;

PEPPER, M ;

AHMED, H ;

FROST, JEF ;

HASKO, DG ;

PEACOCK, DC ;

RITCHIE, DA ;

JONES, GAC .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1988, 21 (08) :L209-L214

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