Bychkov-Rashba Effect and g-Factor Tuning in Modulation Doped SiGe Quantum Wells

• Authors: H. Malissa , W. Jantsch , M. Mühlberger , F. Schäffler , Z. Wilamowski , M. Draxler , P. Bauer
• Languages of publication: EN

Abstracts

EN

We investigate the spin resonance of electrons in one-sided modulation doped Si_{1-x}Ge_x (x=0-10%)) quantum wells defined by Si_{0.75}Ge_{0.25} barriers. In such structures, the Bychkov-Rashba effect induces an effective magnetic field in the quantum well layer which causes anisotropy of both the g-factor and the spin coherence time. Evaluation of the Rashba coefficient as a function of x yields a monotonic increase. For x=5% the shift in the resonance field exceeds the ESR linewidth already, demonstrating the possibility to use this effect for g-factor tuning to select individual spins in an ensemble.

Keywords

EN

73.21.Fg; 85.75.-d

Discipline

• 73.21.Fg: Quantum wells
• 85.75.-d: Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields

• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 105
• Issue: 6
• Pages: 585-590

Dates

published

2004-06

received

2004-05-28

Contributors

author

H. Malissa

• Institut für Halbleiter- und Festkörperphysik, Johannes Kepler Universität, 4040 Linz, Austria

author

W. Jantsch

• Institut für Halbleiter- und Festkörperphysik, Johannes Kepler Universität, 4040 Linz, Austria

author

M. Mühlberger

• Institut für Halbleiter- und Festkörperphysik, Johannes Kepler Universität, 4040 Linz, Austria

author

F. Schäffler

• Institut für Halbleiter- und Festkörperphysik, Johannes Kepler Universität, 4040 Linz, Austria

author

Z. Wilamowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Draxler

• Institut für Experimentalphysik, Johannes Kepler Universität, 4040 Linz, Austria

author

P. Bauer

• Institut für Experimentalphysik, Johannes Kepler Universität, 4040 Linz, Austria

References

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Identifiers

DOI

10.12693/APhysPolA.105.585