Spin-photocurrent in p-SiGe quantum wells under terahertz laser irradiation

V. V. Bel'kov; S. D. Ganichev; P. Schneider; D. Schowalter; U. Rössler; W. Prettl; E. L. Ivchenko; R. Neumann; K. Brunner; G. Abstreiter

Spin-photocurrent in p-SiGe quantum wells under terahertz laser irradiation

V. V. Bel'kov, S. D. Ganichev, P. Schneider, D. Schowalter, U. Rössler, W. Prettl, E. L. Ivchenko, R. Neumann, K. Brunner, G. Abstreiter

Natural Sciences

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

A detailed study of the circular photogalvanic effect (CPGE) in SiGe structures is presented. It is shown that the CPGE becomes possible because of the built-in asymmetry of quantum wells (QWs) in compositionally stepped samples and in asymmetrically doped structures. The photocurrent arises due to optical spin orientation of free carriers in QWs with spin splitting in k-space. It is shown that the effect can be applied to probe the macroscopic in-plane symmetry of low dimensional structures and allowing to conclude on Rashba or Dresselhaus terms in the Hamiltonian.

Original language	English
Pages (from-to)	415-418
Number of pages	4
Journal	Journal of Superconductivity and Novel Magnetism
Volume	16
Issue number	2
State	Published - 2003

Keywords

Photogalvanic effect
Rashba term
SiGe-QWs

Cite this

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title = "Spin-photocurrent in p-SiGe quantum wells under terahertz laser irradiation",

abstract = "A detailed study of the circular photogalvanic effect (CPGE) in SiGe structures is presented. It is shown that the CPGE becomes possible because of the built-in asymmetry of quantum wells (QWs) in compositionally stepped samples and in asymmetrically doped structures. The photocurrent arises due to optical spin orientation of free carriers in QWs with spin splitting in k-space. It is shown that the effect can be applied to probe the macroscopic in-plane symmetry of low dimensional structures and allowing to conclude on Rashba or Dresselhaus terms in the Hamiltonian.",

keywords = "Photogalvanic effect, Rashba term, SiGe-QWs",

author = "Bel'kov, {V. V.} and Ganichev, {S. D.} and P. Schneider and D. Schowalter and U. R{\"o}ssler and W. Prettl and Ivchenko, {E. L.} and R. Neumann and K. Brunner and G. Abstreiter",

year = "2003",

language = "English",

volume = "16",

pages = "415--418",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

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}

TY - JOUR

T1 - Spin-photocurrent in p-SiGe quantum wells under terahertz laser irradiation

AU - Bel'kov, V. V.

AU - Ganichev, S. D.

AU - Schneider, P.

AU - Schowalter, D.

AU - Rössler, U.

AU - Prettl, W.

AU - Ivchenko, E. L.

AU - Neumann, R.

AU - Brunner, K.

AU - Abstreiter, G.

PY - 2003

Y1 - 2003

N2 - A detailed study of the circular photogalvanic effect (CPGE) in SiGe structures is presented. It is shown that the CPGE becomes possible because of the built-in asymmetry of quantum wells (QWs) in compositionally stepped samples and in asymmetrically doped structures. The photocurrent arises due to optical spin orientation of free carriers in QWs with spin splitting in k-space. It is shown that the effect can be applied to probe the macroscopic in-plane symmetry of low dimensional structures and allowing to conclude on Rashba or Dresselhaus terms in the Hamiltonian.

AB - A detailed study of the circular photogalvanic effect (CPGE) in SiGe structures is presented. It is shown that the CPGE becomes possible because of the built-in asymmetry of quantum wells (QWs) in compositionally stepped samples and in asymmetrically doped structures. The photocurrent arises due to optical spin orientation of free carriers in QWs with spin splitting in k-space. It is shown that the effect can be applied to probe the macroscopic in-plane symmetry of low dimensional structures and allowing to conclude on Rashba or Dresselhaus terms in the Hamiltonian.

KW - Photogalvanic effect

KW - Rashba term

KW - SiGe-QWs

UR - http://www.scopus.com/inward/record.url?scp=3543071608&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:3543071608

SN - 1557-1939

VL - 16

SP - 415

EP - 418

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 2

ER -

Spin-photocurrent in p-SiGe quantum wells under terahertz laser irradiation

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Keywords

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