Spontaneous spin coherence in n-GaAs produced by ferromagnetic proximity polarization -: art. no. 121202

被引：72

作者：

Epstein, RJ ^{[1
]}

Malajovich, I ^{[1
]}

Kawakami, RK ^{[1
]}

Chye, Y ^{[1
]}

Hanson, M ^{[1
]}

Petroff, PM ^{[1
]}

Gossard, AC ^{[1
]}

Awschalom, DD ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Ctr Spintron & Quantum Computat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.65.121202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We find that photoexcited electrons in an n-GaAs epilayer rapidly (<50 ps) spin polarize due to the proximity of an epitaxial ferromagnetic metal. Comparison between MnAs/GaAs and Fe/GaAs structures reveals that this coherent spin polarization is aligned antiparallel and parallel to their magnetizations, respectively. In addition, the GaAs nuclear spins are dynamically polarized with a sign determined by the spontaneous electron-spin orientation. In Fe/GaAs, competition between nuclear hyperfine and applied magnetic fields results in complete quenching of electron-spin precession.

引用

页码：1212021 / 1212024

页数：4

共 50 条

[41] Isoelectronic traps in heavily doped GaAs:(In,N) -: art. no. 235202
Intartaglia, R
Taliercio, T
Valvin, P
Gil, B
Bretagnon, T
Lefebvre, P
Pinault, MA
Tournié, E
PHYSICAL REVIEW B, 2003, 68 (23)
[42] Electric field dependence of spin coherence in (001) GaAs/AlxGa1-xAs quantum wells -: art. no. 161311
Lau, WH
Flatté, ME
PHYSICAL REVIEW B, 2005, 72 (16)
[43] Spin polarization dependence of the Coulomb drag at large rs -: art. no. 016807
Pillarisetty, R
Noh, H
Tutuc, E
Poortere, EPD
Tsui, DC
Shayegan, M
PHYSICAL REVIEW LETTERS, 2005, 94 (01)
[44] Entanglement and spontaneous symmetry breaking in quantum spin models -: art. no. 060301
Syljuåsen, OF
PHYSICAL REVIEW A, 2003, 68 (06):
[45] UGe2:: A ferromagnetic spin-triplet superconductor -: art. no. 144519
Huxley, A
Sheikin, I
Ressouche, E
Kernavanois, N
Braithwaite, D
Calemczuk, R
Flouquet, J
PHYSICAL REVIEW B, 2001, 63 (14)
[46] Spin-dependent electron dynamics in front of a ferromagnetic surface -: art. no. 107402
Schmidt, AB
Pickel, M
Wiemhöfer, M
Donath, M
Weinelt, M
PHYSICAL REVIEW LETTERS, 2005, 95 (10)
[47] Conditions for efficient spin injection from a ferromagnetic metal into a semiconductor -: art. no. 184420
Fert, A
Jaffrès, H
PHYSICAL REVIEW B, 2001, 64 (18)
[48] Imaging laser irradiated enamel surfaces with polarization sensitive optical coherence tomography - art. no. 68430N
Hsu, Dennis J.
Darling, Cynthia L.
Fried, Daniel
LASERS IN DENTISTRY XIV, 2008, 6843 : N8430 - N8430
[49] Two-level model of longitudinal magnetic field-induced current instability and chaos in n-GaAs -: art. no. 205201
Tzeng, SYT
Tzeng, Y
PHYSICAL REVIEW B, 2005, 72 (20)
[50] Higher spin symmetry and N=4 SYM -: art. no. 058
Beisert, N
Bianchi, M
Morales, JF
Samtleben, H
JOURNAL OF HIGH ENERGY PHYSICS, 2004, (07):

← 1 2 3 4 5 →