Detection of spin polarized currents in quantum point contacts via transverse electron focusing

被引：32

作者：

Reynoso, A. ^{[1
]}

Usaj, Gonzalo

Balseiro, C. A.

机构：

[1] Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.75.085321

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It has been predicted recently that an electron beam can be polarized when it flows adiabatically through a quantum point contact in a system with spin-orbit interaction. Here, we show that a simple transverse electron focusing setup can be used to detect such polarized current. It uses the amplitude's asymmetry of the spin-split transverse electron focusing peak to extract information about the electron's spin polarization. On the other hand, and depending on the quantum point contact geometry, including this one-body effect can be important when using the focusing setup to study many-body effects in quantum point contacts.

引用

页数：5

共 34 条

[1]

Awschalom DD, 2002, NANOSCI TECHNOL, P147

[2]

BEENAKKER CWJ, 1991, SOLID STATE PHYS, V44, P1

[3] On the magnetic nature of quantum point contacts [J].

Cornaglia, PS ;

Balseiro, CA .

EUROPHYSICS LETTERS, 2004, 67 (04) :634-640

[4] ELECTRONIC ANALOG OF THE ELECTROOPTIC MODULATOR [J].

DATTA, S ;

DAS, B .

APPLIED PHYSICS LETTERS, 1990, 56 (07) :665-667

[5] Rashba effect and magnetic field in semiconductor quantum wires [J].

Debald, S ;

Kramer, B .

PHYSICAL REVIEW B, 2005, 71 (11)

[6] Current focusing in InSb heterostructures [J].

Dedigama, A. R. ;

Deen, D. ;

Murphy, S. Q. ;

Goel, N. ;

Keay, J. C. ;

Santos, M. B. ;

Suzuki, K. ;

Miyashita, S. ;

Hirayama, Y. .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2006, 34 (1-2) :647-650

[7] CURRENT-INDUCED SPIN ORIENTATION OF ELECTRONS IN SEMICONDUCTORS [J].

DYAKONOV, MI ;

PEREL, VI .

PHYSICS LETTERS A, 1971, A 35 (06) :459-&

[8]

DYAKONOV MI, 1971, JETP LETT-USSR, V13, P467

[9] Datta-Das transistor with enhanced spin control [J].

Egues, JC ;

Burkard, G ;

Loss, D .

APPLIED PHYSICS LETTERS, 2003, 82 (16) :2658-2660

[10] Theory of spin hall conductivity in n-doped GaAs -: art. no. 166605 [J].

Engel, HA ;

Halperin, BI ;

Rashba, EI .

PHYSICAL REVIEW LETTERS, 2005, 95 (16)

← 1 2 3 4 →