Inversion-Asymmetry-Induced Spin Splitting

2003 ◽  
pp. 69-130 ◽  
Author(s):  
Roland Winkler
Keyword(s):  
Spin Splitting ◽  
Inversion Asymmetry

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.

Spin splitting of conduction subbands in III-V heterostructures due to inversion asymmetry

1999 ◽  
Vol 59 (8) ◽  
pp. R5312-R5315 ◽  
Author(s):  
P. Pfeffer ◽  
W. Zawadzki
Keyword(s):  
Spin Splitting ◽  
Inversion Asymmetry

Inversion asymmetry spin splitting in self-assembled quantum rings

2008 ◽  
Vol 77 (3) ◽  
Author(s):  
Fabrízio M. Alves ◽  
C. Trallero-Giner ◽  
V. Lopez-Richard ◽  
G. E. Marques
Keyword(s):  
Spin Splitting ◽  
Quantum Rings ◽  
Self Assembled ◽  
Inversion Asymmetry

scholarly journals Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries

2021 ◽  
Author(s):  
Tomas Jungwirth ◽  
Libor Šmejkal ◽  
Jairo Sinova
Keyword(s):  
Functional Materials ◽  
Real Space ◽  
Spin Splitting ◽  
Spin Coherence ◽  
Energy Bands ◽  
Quantum Phases ◽  
Magnetic Symmetry ◽  
Crystal Space ◽  
Inversion Asymmetry ◽  
Spin Momentum

Abstract The search for novel magnetic quantum phases, phenomena and functional materials has been guided by relativistic magnetic-symmetry groups in coupled spin and real space from the dawn of the field in 1950s to the modern era of topological matter. However, the magnetic groups cannot disentangle non-relativistic phases and effects, such as the recently reported unconventional spin physics in collinear antiferromagnets, from the typically weak relativistic spin-orbit coupling phenomena. Here we discover that more general spin symmetries in decoupled spin and crystal space categorize non-relativistic collinear magnetism in three phases: conventional ferromagnets and antiferromangets, and a third distinct phase combining zero net magnetization with an alternating spin-momentum locking in energy bands, which we dub "altermagnetic". For this third basic magnetic phase, which is omitted by the relativistic magnetic groups, we develop a spin-group theory describing six characteristic types of the altermagnetic spin-momentum locking. We demonstrate an extraordinary spin-splitting mechanism in altermagnetic bands originating from a local electric crystal field, which contrasts with the conventional magnetic or relativistic splitting by global magnetization or inversion asymmetry. Based on first-principles calculations, we identify altermagnetic candidates ranging from insulators and metals to a parent crystal of cuprate superconductor. Our results underpin emerging research of quantum phases and spintronics in high-temperature magnets with light elements, vanishing net magnetization, and strong spin-coherence.

Anti-Weak-Localization Study of Rashba Spin-Splitting Energy as a Function of Well Asymmetry in InAlAs/InGaAs/InAlAs Quantum Wells

2001 ◽  
Vol 690 ◽  
Author(s):  
Takaaki Koga ◽  
Junsaku Nitta ◽  
Tatsushi Akazaki ◽  
Hideaki Takayanagi
Keyword(s):  
Quantum Wells ◽  
Weak Localization ◽  
Spin Splitting ◽  
Strong Correlations ◽  
Coupling Constant ◽  
Rashba Spin ◽  
Rashba Spin Splitting ◽  
Structural Inversion ◽  
Splitting Energy ◽  
Inversion Asymmetry

ABSTRACTWe have investigated the values of the Rashba spin-orbit coupling constant α in In0.52Al0.48As/In0.53Ga0.47As/In0.52Al0.48As quantum wells using an anti-weak-localization (AWL) analysis as a function of quantum well asymmetry. We have found that the deduced α values have strong correlations with the structural inversion asymmetry of the pertinent quantum wells as predicted theoretically. This fact suggests that the AWL analysis provides a reliable way to deduce α values experimentally for designing future spintronics devices.

Robust room-temperature inversion-asymmetry topological transitions in functionalized HgSe monolayer

2016 ◽  
Vol 4 (11) ◽  
pp. 2243-2251 ◽  
Author(s):  
Sheng-shi Li ◽  
Wei-xiao Ji ◽  
Chang-wen Zhang ◽  
Ping Li ◽  
Pei-ji Wang
Keyword(s):  
Electric Field ◽  
Room Temperature ◽  
Temperature Inversion ◽  
Strain Engineering ◽  
Spin Splitting ◽  
Topological Phase ◽  
Rashba Spin ◽  
Band Inversion ◽  
Rashba Spin Splitting ◽  
Inversion Asymmetry

Nontrivial topological phase can be confirmed in HgSeI2monolayer with typical band inversion and sizable Rashba spin splitting, which possesses excellent robustness against strain engineering and external electric field.

Sign in / Sign up

Export Citation Format

Share Document