Enhanced spin-relaxation time due to electron-electron scattering in semiconductor quantum wells

被引：75

作者：

Leyland, W. J. H. ^{[1
]}

John, G. H.

Harley, R. T.

Glazov, M. M.

Ivchenko, E. L.

Ritchie, D. A.

Farrer, I.

Shields, A. J.

Henini, M.

机构：

[1] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[2] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[4] Toshiba Res Europe Ltd, Cambridge CB4 4WE, England

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 16期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.75.165309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a detailed experimental and theoretical analysis of the spin dynamics of two-dimensional electron gases (2DEGs) in a series of n-doped GaAs/Al(x)Ga(1-x)As quantum wells. Picosecond-resolution polarized pump-probe reflection techniques were applied in order to study in detail the temperature, concentration, and quantum-well-width dependencies of the spin relaxation rate of a small photoexcited electron population. A rapid enhancement of the spin lifetime with temperature up to a maximum near the Fermi temperature of the 2DEG was demonstrated experimentally. These observations are consistent with the D'yakonov-Perel' spin-relaxation mechanism controlled by electron-electron collisions. The experimental results and theoretical predictions for the spin relaxation times are in good quantitative agreement.

引用

页数：8

共 31 条

[1] OPTICAL STUDIES OF ELECTRON AND HOLE FERMI SEAS IN A SINGLE GAAS/ALXGA1-XAS QUANTUM-WELL [J].

ANDREWS, SR ;

PLAUT, AS ;

HARLEY, RT ;

KERR, TM .

PHYSICAL REVIEW B, 1990, 41 (08) :5040-5047

[2] Spin relaxation anisotropy in two-dimensional semiconductor systems [J].

Averkiev, NS ;

Golub, LE ;

Willander, M .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (12) :R271-R283

[3] Spin coherence and dephasing in GaN [J].

Beschoten, B ;

Johnston-Halperin, E ;

Young, DK ;

Poggio, M ;

Grimaldi, JE ;

Keller, S ;

DenBaars, SP ;

Mishra, UK ;

Hu, EL ;

Awschalom, DD .

PHYSICAL REVIEW B, 2001, 63 (12)

[4]

BIR GL, 1976, ZH EKSP TEOR FIZ, V42, P705

[5] Precession and motional slowing of spin evolution in a high mobility two-dimensional electron gas [J].

Brand, MA ;

Malinowski, A ;

Karimov, OZ ;

Marsden, PA ;

Harley, RT ;

Shields, AJ ;

Sanvitto, D ;

Ritchie, DA ;

Simmons, MY .

PHYSICAL REVIEW LETTERS, 2002, 89 (23)

[6]

Dyakonov M. I., 1972, SOV PHYS-SOLID STATE, V13, P3023

[7]

DYAKONOV MI, 1971, SOV PHYS JETP-USSR, V33, P1053

[8]

DYAKONOV MI, 1986, SOV PHYS SEMICOND+, V20, P110

[9] THEORY OF THE EFFECT OF SPIN-ORBIT COUPLING ON MAGNETIC RESONANCE IN SOME SEMICONDUCTORS [J].

ELLIOTT, RJ .

PHYSICAL REVIEW, 1954, 96 (02) :266-279

[10]

FLATTE ME, 2002, SPIN DYNAMICS SEMICO, pCH4

← 1 2 3 4 →