Spin-dependent transport in a magnetic two-dimensional electron gas

I. P. Smorchkova; J. M. Kikkawa; N. Samarth; D. D. Awschalom

doi:10.1016/S1386-9477(98)00079-4

Spin-dependent transport in a magnetic two-dimensional electron gas

I. P. Smorchkova, J. M. Kikkawa, N. Samarth, D. D. Awschalom

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

10 Scopus citations

Abstract

Magneto-transport and magneto-optical probes are used to interrogate spin-dependent transport in magnetic heterostructures wherein a two dimensional electron gas (2DEG) is exchange-coupled to local moments. At low temperatures, the significant s-d exchange-enhanced spin splitting in these "magnetic" 2DEGs is responsible for the observation of unusual transport properties such as a complete spin polarization of the gas at large Landau level filling factors and a pronounced, non-monotonic background magneto-resistance. Magneto-transport measurements of gated samples performed in a parallel field geometry are used to systematically study the variation of the magneto-resistance with sheet concentration, yielding new insights into the dependence of spin transport on the Fermi energy of the majority spin carriers.

Original language	English (US)
Pages (from-to)	381-387
Number of pages	7
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	2
Issue number	1-4
DOIs	https://doi.org/10.1016/S1386-9477(98)00079-4
State	Published - Jul 15 1998

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Access to Document

10.1016/S1386-9477(98)00079-4

Cite this

@article{1deb1a4e89a04088b33aa58f5ab5b78c,

title = "Spin-dependent transport in a magnetic two-dimensional electron gas",

abstract = "Magneto-transport and magneto-optical probes are used to interrogate spin-dependent transport in magnetic heterostructures wherein a two dimensional electron gas (2DEG) is exchange-coupled to local moments. At low temperatures, the significant s-d exchange-enhanced spin splitting in these {"}magnetic{"} 2DEGs is responsible for the observation of unusual transport properties such as a complete spin polarization of the gas at large Landau level filling factors and a pronounced, non-monotonic background magneto-resistance. Magneto-transport measurements of gated samples performed in a parallel field geometry are used to systematically study the variation of the magneto-resistance with sheet concentration, yielding new insights into the dependence of spin transport on the Fermi energy of the majority spin carriers.",

author = "Smorchkova, {I. P.} and Kikkawa, {J. M.} and N. Samarth and Awschalom, {D. D.}",

note = "Funding Information: This work was supported by grants ONR N00014-94-1-0297 and -0225, and NSF DMR 92-07567, 95-00460, 94-13708 and STC DMR 91-20007. I.P. Smorchkova also acknowledges student fellowship support from the NSF-STC QUEST. ",

year = "1998",

month = jul,

day = "15",

doi = "10.1016/S1386-9477(98)00079-4",

language = "English (US)",

volume = "2",

pages = "381--387",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Spin-dependent transport in a magnetic two-dimensional electron gas

AU - Smorchkova, I. P.

AU - Kikkawa, J. M.

AU - Samarth, N.

AU - Awschalom, D. D.

N1 - Funding Information: This work was supported by grants ONR N00014-94-1-0297 and -0225, and NSF DMR 92-07567, 95-00460, 94-13708 and STC DMR 91-20007. I.P. Smorchkova also acknowledges student fellowship support from the NSF-STC QUEST.

PY - 1998/7/15

Y1 - 1998/7/15

N2 - Magneto-transport and magneto-optical probes are used to interrogate spin-dependent transport in magnetic heterostructures wherein a two dimensional electron gas (2DEG) is exchange-coupled to local moments. At low temperatures, the significant s-d exchange-enhanced spin splitting in these "magnetic" 2DEGs is responsible for the observation of unusual transport properties such as a complete spin polarization of the gas at large Landau level filling factors and a pronounced, non-monotonic background magneto-resistance. Magneto-transport measurements of gated samples performed in a parallel field geometry are used to systematically study the variation of the magneto-resistance with sheet concentration, yielding new insights into the dependence of spin transport on the Fermi energy of the majority spin carriers.

AB - Magneto-transport and magneto-optical probes are used to interrogate spin-dependent transport in magnetic heterostructures wherein a two dimensional electron gas (2DEG) is exchange-coupled to local moments. At low temperatures, the significant s-d exchange-enhanced spin splitting in these "magnetic" 2DEGs is responsible for the observation of unusual transport properties such as a complete spin polarization of the gas at large Landau level filling factors and a pronounced, non-monotonic background magneto-resistance. Magneto-transport measurements of gated samples performed in a parallel field geometry are used to systematically study the variation of the magneto-resistance with sheet concentration, yielding new insights into the dependence of spin transport on the Fermi energy of the majority spin carriers.

UR - http://www.scopus.com/inward/record.url?scp=0347569875&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0347569875&partnerID=8YFLogxK

U2 - 10.1016/S1386-9477(98)00079-4

DO - 10.1016/S1386-9477(98)00079-4

M3 - Article

AN - SCOPUS:0347569875

SN - 1386-9477

VL - 2

SP - 381

EP - 387

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-4

ER -

Spin-dependent transport in a magnetic two-dimensional electron gas

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this