Inversion Asymmetry and Magneto-optics in Semiconductors

1989 ◽  
pp. 550-557
Author(s):  
S. Rodriguez
Keyword(s):  
Inversion Asymmetry

RESONANT SPIN POLARIZATION IN A TWO-DIMENSIONAL HOLE GAS

2011 ◽  
Vol 25 (15) ◽  
pp. 1259-1270
Author(s):  
TIANXING MA
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Spin Polarization ◽  
Zeeman Splitting ◽  
Resonant Peak ◽  
Two Dimensional ◽  
Structural Inversion ◽  
Inversion Asymmetry ◽  
Peak Increase ◽  
Luttinger Hamiltonian

Within the Luttinger Hamiltonian, electric-field-induced resonant spin polarization of a two-dimensional hole gas in a perpendicular magnetic field was studied. The spin polarization arising from splitting between the light and the heavy hole bands shows a resonant peak at a certain magnetic field. Especially, the competition between the Luttinger term and the structural inversion asymmetry leads to a rich resonant peaks structure, and the required magnetic field for the resonance may be effectively reduced by enlarging the effective width of the quantum well. Furthermore, the Zeeman splitting tends to move the resonant spin polarization to a relative high magnetic field and destroy these rich resonant spin phenomena. Finally, both the height and the weight of the resonant peak increase as the temperature decreases. It is believed that such resonant spin phenomena may be verified in the sample of a two-dimensional hole gas, and it may provide an efficient way to control spin polarization by an external electric field.

scholarly journals Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Yan Shao ◽  
Wei Gao ◽  
Hejin Yan ◽  
Runlai Li ◽  
Ibrahim Abdelwahab ◽  
...  
Keyword(s):  
Density Functional ◽  
Carrier Transport ◽  
Plane Surface ◽  
Structural Phase ◽  
Density Functional Theory Calculations ◽  
Spin Splitting ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Out Of Plane ◽  
Inversion Asymmetry

AbstractMolecularly soft organic-inorganic hybrid perovskites are susceptible to dynamic instabilities of the lattice called octahedral tilt, which directly impacts their carrier transport and exciton-phonon coupling. Although the structural phase transitions associated with octahedral tilt has been extensively studied in 3D hybrid halide perovskites, its impact in hybrid 2D perovskites is not well understood. Here, we used scanning tunneling microscopy (STM) to directly visualize surface octahedral tilt in freshly exfoliated 2D Ruddlesden-Popper perovskites (RPPs) across the homologous series, whereby the steric hindrance imposed by long organic cations is unlocked by exfoliation. The experimentally determined octahedral tilts from n = 1 to n = 4 RPPs from STM images are found to agree very well with out-of-plane surface octahedral tilts predicted by density functional theory calculations. The surface-enhanced octahedral tilt is correlated to excitonic redshift observed in photoluminescence (PL), and it enhances inversion asymmetry normal to the direction of quantum well and promotes Rashba spin splitting for n > 1.

Influence of bulk inversion asymmetry on the Datta–Das transistor

2004 ◽  
Vol 21 (2-4) ◽  
pp. 951-955 ◽  
Author(s):  
A. Łusakowski ◽  
J. Wróbel ◽  
T. Dietl
Keyword(s):  
Bulk Inversion Asymmetry ◽  
Inversion Asymmetry ◽  
Bulk Inversion
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