Spin-dependent electron behaviour in quantum point contacts

被引：14

作者：

Bychkov, AM ^{[1
]}

Yakimenko, II

Berggren, KF

机构：

[1] Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden

[2] Tech Univ Moscow, Moscow State Engn Phys Inst, Moscow 115409, Russia

来源：

NANOTECHNOLOGY | 2000年 / 11卷 / 04期

关键词：

D O I：

10.1088/0957-4484/11/4/325

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of spontaneous spin polarization in quantum point contacts (QPCs) is investigated by self-consistent modelling within the Kohn-Sham local spin-density formalism. The existence of the spin-polarized state of the QPC channel in the low-density regime is shown to change the value and the shape of the effective potential barrier for up- and down-spin electrons. We suggest that this effect can be relevant to the explanation of the anomalous 0.7-structure in the QPC conductance and may assist spin injection in potential spintronic devices.

引用

页码：318 / 322

页数：5

共 20 条

[11] Material science - Injecting spin into electronics [J].

Oestreich, M .

NATURE, 1999, 402 (6763) :735-737

[12] Ferromagnetic correlations in quasi-one-dimensional conducting channels [J].

Spivak, B ;

Zhou, F .

PHYSICAL REVIEW B, 2000, 61 (24) :16730-16735

[13] Interaction effects in a one-dimensional constriction [J].

Thomas, KJ ;

Nicholls, JT ;

Appleyard, NJ ;

Simmons, MY ;

Pepper, M ;

Mace, DR ;

Tribe, WR ;

Ritchie, DA .

PHYSICAL REVIEW B, 1998, 58 (08) :4846-4852

[14] 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

[15] Spin properties of low-density one-dimensional wires [J].

Thomas, KJ ;

Nicholls, JT ;

Pepper, M ;

Tribe, WR ;

Simmons, MY ;

Ritchie, DA .

PHYSICAL REVIEW B, 2000, 61 (20) :13365-13368

[16] Local spin polarization in ballistic quantum point contacts [J].

Wang, CK ;

Berggren, KF .

PHYSICAL REVIEW B, 1998, 57 (08) :4552-4556

[17] Spin splitting of subbands in quasi-one-dimensional electron quantum channels [J].

Wang, CK ;

Berggren, KF .

PHYSICAL REVIEW B, 1996, 54 (20) :14257-14260

[18] Electronic configurations in coupled many-electron quantum-dot systems [J].

Yakimenko, II ;

Zozoulenko, IV ;

Berggren, KF .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1999, 14 (11) :949-957

[19]

YAKIMENKO II, UNPUB PHYS REV B

[20]

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