Results 51 to 60 of about 17,657 (203)
, 2020 We study what kind of topological crystalline insulator phase emerges from nodal line semimetal phases in the face-centered cubic system which is not indicated by topological indices when spin-orbit coupling (SOC) is introduced. We construct an effective
Tateishi, Ikuma
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Advanced Functional Materials, EarlyView.A frequency‐tunable ferroelectric synaptic transistor based on a buried‐gate InGaZnO channel and Al2O3/HfO2 dielectric stack exhibits linear and reversible weight updates using single‐polarity pulses. By switching between ferroelectric and trap‐assisted modes depending on input frequency, the device simplifies neuromorphic circuit design and achieves ...
Ojun Kwon +8 more
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Semiclassical approximations for adiabatic slow-fast systems
, 2012 In this letter we give a systematic derivation and justification of the semiclassical model for the slow degrees of freedom in adiabatic slow-fast systems first found by Littlejohn and Flynn [5].
Teufel, Stefan
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UV Laser‐Induced Carbon Microelectrode Arrays for Neuronal Recordings
Advanced Healthcare Materials, EarlyView.Thin‐film electrodes are flexible devices of high conformability and minimal dimensions with attractive properties for in vivo and in vitro bioelectronics. Here, electrodes are developed from parylene films via ultraviolet laser‐induced carbonization.
Fulvia Del Duca +10 more
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Upper-branch thermal Hall effect in quantum paramagnets
Physical Review ResearchInspired by the persistent thermal Hall effects at finite temperatures in various quantum paramagnets, we explore the origin of the thermal Hall effects from the perspective of the upper branch parts by invoking dispersive and twisted crystal field ...
Bowen Ma, Z. D. Wang, Gang V. Chen
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Adiabatic continuity between Hofstadter and Chern insulator states
, 2012 We show that the topologically nontrivial bands of Chern insulators are adiabatic cousins of the Landau bands of Hofstadter lattices. We demonstrate adiabatic connection also between several familiar fractional quantum Hall states on Hofstadter lattices ...
J. K. Jain +6 more
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Advanced Materials, EarlyView.In this work, nonzero Berry curvature in photonic crystals is induced by breaking unit cell inversion symmetry through spatial shifts rather than geometrical modifications. This enables the design of ultraconfined topological states with subwavelength in‐plane field confinement and out‐of‐plane field isolation.
Yi Ji Tan, Ranjan Singh
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Chiral transport equation from the quantum Dirac Hamiltonian and the on-shell effective field theory
, 2014 We derive the relativistic chiral transport equation for massless fermions and antifermions by performing a semiclassical Foldy-Wouthuysen diagonalization of the quantum Dirac Hamiltonian.
Manuel, Cristina, Torres-Rincon, Juan M.
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Reconfigurable Magnetotransport in MnBi2Te4 via Gate and Magnetic Field Tuning
Advanced Materials, EarlyView.Gate‐tunable magnetoresistance sign reversal under in‐plane magnetic fields is observed in an ultrathin MnBi2Te4 device, arising from spin reorientation and distinct scattering mechanisms. Moreover, angular‐dependent measurements reveal clear gate‐controlled magnetotransport anisotropy, underscoring the strong coupling between gating, spin ...
Yuang Jie +7 more
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Tunnels under geometries (or instantons know their algebras)
Journal of High Energy PhysicsIn the tight binding model with multiple degenerate vacua we might treat wave function overlaps as instanton tunnelings between different wells (vacua). An amplitude for such a tunneling process might be constructed as T i → j ∼ e − S inst v j + v i − $$
Dmitry Galakhov, Alexei Morozov
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