Details
| Original language | English |
|---|---|
| Article number | 245425 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 83 |
| Issue number | 24 |
| Publication status | Published - 27 Jun 2011 |
Abstract
Macroscopic magnetotransport measurements at Bi films grown epitaxially on Si(111) substrates have been carried out at 10 K. The magnetoconductance curves reveal two characteristic regimes, which are assigned to magnetotransport by surface and bulk states, respectively. In contrast to bulk, backscattering, i.e., weak localization, is strongly restricted for the charge carriers in the spin-polarized surface bands, and a classical magnetoresistance behavior was found. While the surface-state conductivity was found to be as high as 4×10-4Ω-1/□, the bulk conductivity is extremely low, possibly due to quantum confinement of the bulk band structure.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 24, 245425, 27.06.2011.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Sensing surface states of Bi films by magnetotransport
AU - Lükermann, Daniel
AU - Sologub, S.
AU - Pfnür, Herbert
AU - Tegenkamp, Christoph
PY - 2011/6/27
Y1 - 2011/6/27
N2 - Macroscopic magnetotransport measurements at Bi films grown epitaxially on Si(111) substrates have been carried out at 10 K. The magnetoconductance curves reveal two characteristic regimes, which are assigned to magnetotransport by surface and bulk states, respectively. In contrast to bulk, backscattering, i.e., weak localization, is strongly restricted for the charge carriers in the spin-polarized surface bands, and a classical magnetoresistance behavior was found. While the surface-state conductivity was found to be as high as 4×10-4Ω-1/□, the bulk conductivity is extremely low, possibly due to quantum confinement of the bulk band structure.
AB - Macroscopic magnetotransport measurements at Bi films grown epitaxially on Si(111) substrates have been carried out at 10 K. The magnetoconductance curves reveal two characteristic regimes, which are assigned to magnetotransport by surface and bulk states, respectively. In contrast to bulk, backscattering, i.e., weak localization, is strongly restricted for the charge carriers in the spin-polarized surface bands, and a classical magnetoresistance behavior was found. While the surface-state conductivity was found to be as high as 4×10-4Ω-1/□, the bulk conductivity is extremely low, possibly due to quantum confinement of the bulk band structure.
UR - http://www.scopus.com/inward/record.url?scp=79961240595&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.83.245425
DO - 10.1103/PhysRevB.83.245425
M3 - Article
AN - SCOPUS:79961240595
VL - 83
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 24
M1 - 245425
ER -