Localization in an inhomogeneous quantum wire

被引：34

作者：

Gueclue, A. D. ^{[1
]}

Umrigar, C. J. ^{[2
]}

Jiang, Hong ^{[3
]}

Baranger, Harold U. ^{[1
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

[2] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA

[3] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 20期

关键词：

POINT CONTACTS;

D O I：

10.1103/PhysRevB.80.201302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study interaction-induced localization of electrons in an inhomogeneous quasi-one-dimensional system-a wire with two regions, one at low density and the other high. Quantum Monte Carlo techniques are used to treat the strong Coulomb interactions in the low-density region, where localization of electrons occurs. The nature of the transition from high to low density depends on the density gradient-if it is steep, a barrier develops between the two regions, causing Coulomb blockade effects. Ferromagnetic spin polarization does not appear for any parameters studied. The picture emerging is in good agreement with measurements of tunneling between wires.

引用

页数：4

共 39 条

[31] Correlation effects in quasi-one-dimensional quantum wires
Shulenburger, Luke
Casula, Michele
Senatore, Gaetano
Martin, Richard M.
[J]. PHYSICAL REVIEW B, 2008, 78 (16):
[32] Localization transition in a ballistic quantum wire
Steinberg, H
Auslaender, OM
Yacoby, A
Qian, J
Fiete, GA
Tserkovnyak, Y
Halperin, BI
Baldwin, KW
Pfeiffer, LN
West, KW
[J]. PHYSICAL REVIEW B, 2006, 73 (11):
[33] Restricted and unrestricted Hartree-Fock calculations of conductance for a quantum point contact
Sushkov, OP
[J]. PHYSICAL REVIEW B, 2003, 67 (19)
[34] Possible spin polarization in a one-dimensional electron gas
Thomas, KJ
Nicholls, JT
Simmons, MY
Pepper, M
Mace, DR
Ritchie, DA
[J]. PHYSICAL REVIEW LETTERS, 1996, 77 (01) : 135 - 138
[35] Alleviation of the fermion-sign problem by optimization of many-body wave functions
Umrigar, C. J.
Toulouse, Julien
Filippi, Claudia
Sorella, S.
Hennig, R. G.
[J]. PHYSICAL REVIEW LETTERS, 2007, 98 (11)
[36] Energy and variance optimization of many-body wave functions
Umrigar, CJ
Filippi, C
[J]. PHYSICAL REVIEW LETTERS, 2005, 94 (15)
[37] Coulomb blockade without potential barriers
Vasseur, G
Weinmann, D
Jalabert, RA
[J]. EUROPEAN PHYSICAL JOURNAL B, 2006, 51 (02) : 267 - 275
[38] Spin splitting of subbands in quasi-one-dimensional electron quantum channels
Wang, CK
Berggren, KF
[J]. PHYSICAL REVIEW B, 1996, 54 (20): : 14257 - 14260
[39] 2008, J PHYS CONDENS MATTE, V20, P16

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