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Magnetic field control of the optical spin Hall effect
Published 2014“…We investigate theoretically the effect of an external magnetic field on polarization patterns appearing in quantum microcavities due to the optical spin Hall effect. We show that increase of the magnetic field perpendicular to the plane of the cavity resulting in the increase of the Zeeman splitting leads to the transition from azimuthal separation of polarizations to their radial separation. …”
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Journal Article -
2
Modulation of spin-orbit torque efficiency by thickness control of heavy metal layers in Co/Pt multilayers
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Journal Article -
3
Quantum spin Hall effect and topological phase transition in InNxBiySb1−x−y/InSb quantum wells
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Journal Article -
4
Giant photonic spin Hall effect empowered by polarization-dependent quasibound states in the continuum in compound grating waveguide structures
Published 2023“…The photonic spin Hall effect (PSHE) plays an important role in both fundamental science and precision metrology. …”
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5
Unveiling the chirality of the quantum anomalous Hall effect
Published 2024“…The ordinary and quantum Hall effects with fixed carrier types, electron or hole, exhibit well-defined chirality under external magnetic fields, but the analogous chirality of the quantum anomalous Hall effect (QAHE) remains little explored. …”
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6
Dynamical and statistical properties of anyons in fractional quantum hall effect
Published 2024“…The quantum Hall effect has been the prototypical example for many emerging fields of Physics, including the study of topological phases of matter, topological order, and topological insulators. …”
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Thesis-Doctor of Philosophy -
7
Skyrmion-driven topological Hall effect in a Shastry-Sutherland magnet
Published 2023“…Using an $sd$ exchange model, we show here that metallic Shastry-Sutherland magnets can exhibit a topological Hall effect driven by magnetic skyrmions under realistic conditions. …”
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8
Parametric inversion of spin currents in semiconductor microcavities
Published 2013“…The optical spin-Hall effect results in the formation of an antisymmetric real-space polarization pattern giving birth to spin currents. …”
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Journal Article -
9
Chiral spin textures in a frustrated kondo lattice model
Published 2017“…These systems when arranged on geometrically frustrated lattices stabilize topologically non-trivial chiral configurations of localized spins that drive unconventional transport phenomenon such as topological or geometrical Hall effect. …”
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Thesis -
10
Motion of patterns in polariton quantum fluids with spin-orbit interaction
Published 2014“…Similar to the optical spin Hall effect, this becomes possible due to a spin-orbit interaction induced by a longitudinal-transverse splitting (TE-TM splitting) of the photonic resonator mode. …”
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11
Nonlinear spin filter for non-magnetic materials at zero magnetic field
Published 2021“…In semiconductors, spin-to-charge conversion is typically achieved using the inverse spin Hall effect or using a large magnetic field. …”
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12
Spin orbit torques induced magnetization reversal through asymmetric domain wall propagation in Ta/CoFeB/MgO structures
Published 2018“…The magnetization reversal induced by spin orbit torques in the presence of Dzyaloshinskii-Moriya interaction (DMI) in perpendicularly magnetized Ta/CoFeB/MgO structures were investigated by using a combination of Anomalous Hall effect measurement and Kerr effect microscopy techniques. …”
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13
Spin-orbit torque magnetization switching in Co/Pt multilayers for multistate memory and logic devices
Published 2021“…It has proven to be a serious contender in emerging memory technology due to its intrinsic non-volatility, low power dissipation, and high speed. The spin degree of freedom further opens opportunities that exploit its ultrafast dynamics and spin transport. …”
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Thesis-Doctor of Philosophy -
14
Programmable spin–orbit-torque logic device with integrated bipolar bias field for chirality control
Published 2021“…While several field-free spin–orbit torque (SOT)-driven logic devices have been proposed, their operation typically requires additional initialization or reset pulses, the exchange-coupled canted spins reduce both anomalous Hall sign-to-noise ratio as well as thermal stability of the ferromagnetic layer, and device-to-device variation in exchange coupling strength is expected. …”
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Journal Article -
15
Tunable topological phase transition in the telecommunication wavelength
Published 2023“…Recent progress in the Valley Hall insulator has demonstrated a nontrivial topology property due to the distinct valley index in 2D semiconductor systems. …”
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Journal Article -
16
Enhanced spin-orbit torques in rare-earth Pt/[Co/Ni]2/Co/Tb systems
Published 2019“…A relatively large effective spin Hall efficiency of Tb, θeffSH,Tb, is determined to be −0.480 for Tbwith a 9-nm thickness through a Hz-biased harmonic measurement. …”
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17
In situ Kerr and harmonic measurement in determining current-induced effective fields in MgO/CoFeB/Ta
Published 2021“…A combination of the harmonic measurement and in situ Kerr imaging was used to experimentally determine the spin-orbit (SO) effective fields in a MgO/CoFeB/Ta structure. …”
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18
Compositional dependence of spintronic properties in Pt/GdCo films
Published 2024“…We find a 5× increase in effective spin Hall angle with increasing Gd concentration, suggesting an improvement in spin transfer efficiency in rare earth materials. …”
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19
Topological phases with parafermions: theory and blueprints
Published 2016“…First we generalize the intimate connection between the -symmetric Ising quantum spin chain and Majorana fermions to -symmetric chains and parafermions. …”
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20
Engineered terahertz emission from spintronic heterostructures: amplitude, phase and chirality
Published 2023“…As such, the photoexcitation leads to ultrafast spin-scattering events in the FM, during which the spins transport from the FM into the adjacent heavy metal(HM) layer to experience an inverse spin Hall effect, producing a transverse charge current and terahertz radiation. …”
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Thesis-Doctor of Philosophy