Details
| Translated title of the contribution | Der Einfluss von adsorbierten magnetischen und nicht‐magnetischen Atomen auf den elektronischen Transport in Oberflächen mit starker Spin‐Bahn Kopplung |
|---|---|
| Original language | English |
| Pages (from-to) | 210-217 |
| Number of pages | 8 |
| Journal | Materialwissenschaft und Werkstofftechnik |
| Volume | 44 |
| Issue number | 2-3 |
| Publication status | Published - 13 Mar 2013 |
Abstract
Adsorption-induced reduction of the surface state conductivity in epitaxial Bi(111) films, a prototype system with a large Rashba-induced surface state splitting by adsorbed atoms of Bi, Fe and Co was investigated by macroscopic surface magneto-transport measurements at a temperature of 10 K. A detailed analysis of magneto-transport, DC-transport and Hall data reveals that the scattering efficiencies for Co and Fe are by a factor of two larger than for Bi. While for the latter, charge transfer and change of band filling near the Fermi level is negligible, we found an increase of hole concentration upon Co and Fe adsorption. These atoms act as acceptors and retract roughly 0.5 electrons from the surface per adsorbed atom. Besides the dominant classical magneto-conductance signal the films show signatures of weak anti-localization (WAL) reflecting the strong spin-orbit coupling in Bi(111) surface states. Our measurements show that the control of hybridization is important in order to make use of local spin-moments and to increase the backscattering rate in strongly spin-orbit coupled systems, e. g., topological insulators.
Keywords
- adsorption, Bismuth, electronic surface states, magneto-transport, spin-splitting
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materialwissenschaft und Werkstofftechnik, Vol. 44, No. 2-3, 13.03.2013, p. 210-217.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of adsorbed magnetic and non-magnetic atoms on electronic transport through surfaces with strong spin-orbit coupling
AU - Lükermann, Daniel
AU - Sologub, S.
AU - Pfnür, Herbert
AU - Klein, Claudius
AU - Horn-Von-Hoegen, M.
AU - Tegenkamp, Christoph
PY - 2013/3/13
Y1 - 2013/3/13
N2 - Adsorption-induced reduction of the surface state conductivity in epitaxial Bi(111) films, a prototype system with a large Rashba-induced surface state splitting by adsorbed atoms of Bi, Fe and Co was investigated by macroscopic surface magneto-transport measurements at a temperature of 10 K. A detailed analysis of magneto-transport, DC-transport and Hall data reveals that the scattering efficiencies for Co and Fe are by a factor of two larger than for Bi. While for the latter, charge transfer and change of band filling near the Fermi level is negligible, we found an increase of hole concentration upon Co and Fe adsorption. These atoms act as acceptors and retract roughly 0.5 electrons from the surface per adsorbed atom. Besides the dominant classical magneto-conductance signal the films show signatures of weak anti-localization (WAL) reflecting the strong spin-orbit coupling in Bi(111) surface states. Our measurements show that the control of hybridization is important in order to make use of local spin-moments and to increase the backscattering rate in strongly spin-orbit coupled systems, e. g., topological insulators.
AB - Adsorption-induced reduction of the surface state conductivity in epitaxial Bi(111) films, a prototype system with a large Rashba-induced surface state splitting by adsorbed atoms of Bi, Fe and Co was investigated by macroscopic surface magneto-transport measurements at a temperature of 10 K. A detailed analysis of magneto-transport, DC-transport and Hall data reveals that the scattering efficiencies for Co and Fe are by a factor of two larger than for Bi. While for the latter, charge transfer and change of band filling near the Fermi level is negligible, we found an increase of hole concentration upon Co and Fe adsorption. These atoms act as acceptors and retract roughly 0.5 electrons from the surface per adsorbed atom. Besides the dominant classical magneto-conductance signal the films show signatures of weak anti-localization (WAL) reflecting the strong spin-orbit coupling in Bi(111) surface states. Our measurements show that the control of hybridization is important in order to make use of local spin-moments and to increase the backscattering rate in strongly spin-orbit coupled systems, e. g., topological insulators.
KW - adsorption
KW - Bismuth
KW - electronic surface states
KW - magneto-transport
KW - spin-splitting
UR - http://www.scopus.com/inward/record.url?scp=84875269901&partnerID=8YFLogxK
U2 - 10.1002/mawe.201300114
DO - 10.1002/mawe.201300114
M3 - Article
AN - SCOPUS:84875269901
VL - 44
SP - 210
EP - 217
JO - Materialwissenschaft und Werkstofftechnik
JF - Materialwissenschaft und Werkstofftechnik
SN - 0933-5137
IS - 2-3
ER -