Effective mass suppression upon complete spin-polarization in an isotropic two-dimensional electron system
نویسندگان
چکیده
منابع مشابه
Effective mass suppression in dilute, spin-polarized two-dimensional electron systems.
We report effective mass (m*) measurements, via analyzing the temperature dependence of the Shubnikov-de Haas oscillations, for dilute, interacting, two-dimensional electron systems (2DESs) occupying a single conduction-band valley in AlAs quantum wells. When the 2DES is partially spin-polarized, m* is larger than its band value, consistent with previous results on various 2DESs. However, as we...
متن کاملSharply increasing effective mass: a precursor of a spontaneous spin polarization in a dilute two-dimensional electron system
We have measured the effective mass, m, and Landé g factor in very dilute two-dimensional electron systems in silicon. Two independent methods have been used: (i) measurements of the magnetic field required to fully polarize the electrons’ spins and (ii) analysis of the Shubnikov-de Haas oscillations. We have observed a sharp increase of the effective mass with decreasing electron density while...
متن کاملSpin polarization, dephasing, and photoinduced spin diffusion in (110)-grown two-dimensional electron systems
R. Völkl,1 M. Schwemmer,1 M. Griesbeck,1 S. A. Tarasenko,2 D. Schuh,1 W. Wegscheider,3 C. Schüller,1 and T. Korn1,* 1Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany 2A. F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia 3Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland (Rece...
متن کاملSpin current and polarization in impure two-dimensional electron systems with spin-orbit coupling.
We derive the transport equations for two-dimensional electron systems with Rashba spin-orbit interaction and short-range spin-independent disorder. In the limit of slow spatial variations, we obtain coupled diffusion equations for the electron density and spin. Using these equations we calculate electric-field induced spin accumulation and spin current in a finite-size sample for an arbitrary ...
متن کاملHanle spin precession in a two-dimensional electron system
We investigate the nonlocal Hanle effect in high mobility two-dimensional electron systems using (Ga,Mn)As/GaAs spin Esaki diodes as spin selective contacts. Spin signals in these systems can be strongly affected by dynamic nuclear polarization, which mimics long spin-relaxation times extracted from the measured Hanle curves. Here, we introduce a method which largely suppresses these effects by...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.79.195311