Magneto-Raman spectroscopy of spin-density excitations in (001)-grown GaAs-AlGaAs quantum wells in the regime of the persistent spin helix
Magneto-Raman spectroscopy of spin-density excitations in (001)-grown GaAs-AlGaAs quantum wells in the regime of the persistent spin helix
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持久自旋螺旋区域内 (001) 生长的 GaAs-AlGaAs 量子阱中自旋密度激发的磁拉曼光谱
DOI:
10.1117/12.2320205
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
C. Schüller
中科院分区:
文献类型:
--
作者:
S. Gelfert;C. Frankerl;C. Reichl;D. Schuh;G. Salis;W. Wegscheider;D. Bougeard;T. Korn;C. Schüller
We present inelastic light scattering experiments on low-energy intrasubband spin-density excitations (SDE) in 12-nm-wide (001)-oriented GaAs-AlGaAs single quantum well samples with balanced Rashba and Dresselhaus spin-orbit interaction strengths. This unique symmetry causes an effective spin-orbit field either parallel or antiparallel to specific in-plane crystal directions, which supports the persistent spin helix. This results in a highly anisotropic splitting of intrasubband SDEs in the conduction band. Measurements are performed in backscattering geometry, where the SDE is formed by spin-flip intrasubband transitions. A wave-vector transfer into the two-dimensional electron system is realized by tilting the sample. By rotating the sample with a rotary stage, we can precisely map the anisotropic spin splitting, which appears for various crystal directions as a double peak line shape of the spectra. In the presence of external magnetic fields, a superposition of both, the intrinsic spin-orbit field and the external magnetic field, occurs. We analyze our experimental spectra via a lineshape analysis, based on the Lindhard-Mermin lineshape, including the effects of the anisotropic spin splitting and the external magnetic field. This allows us to quantitatively deduce the spin-orbit parameters, the electron g factor, and the single-particle relaxation time from our observations.
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DOI:
10.1103/physrevb.47.16028
发表时间:
1993-06
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Richards;Jusserand;Perić;Etienne
通讯作者:
Richards;Jusserand;Perić;Etienne
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
Gerhard Fasol;N. Mestres;A. Fischer;K. Ploog
通讯作者:
K. Ploog
DOI:
--
发表时间:
1971
期刊:
影响因子:
--
作者:
S. Smith
通讯作者:
S. Smith
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
Christoph Schoenhuber;M. Walser;G. Salis;C. Reichl;W. Wegscheider;T. Korn;C. Schueller
通讯作者:
C. Schueller
影响因子:
3.7
作者:
Kohda, M.;Lechner, V.;Ganichev, S. D.
通讯作者:
Ganichev, S. D.