Finite-temperature plasmons, damping, and collective behavior in the model

A Iurov, L Zhemchuzhna, G Gumbs, D Huang, D Dahal… - Physical Review B, 2022 - APS
We have conducted a thorough theoretical and numerical investigation of the electronic
susceptibility, the polarizability, the plasmon modes and their damping rates, and the static …

[HTML][HTML] Quantum transport and shot noise in two-dimensional semi-Dirac system

WJ Chan, LK Ang, YS Ang - Applied Physics Letters, 2023 - pubs.aip.org
Two-dimensional (2D) semi-Dirac systems, such as 2D black phosphorus and arsenene,
can exhibit a rich topological phase transition between insulating, semi-Dirac, and band …

Pure crossed Andreev reflection assisted transverse valley currents in lattices

W Zeng, R Shen - Physical Review B, 2022 - APS
We propose a method for the generation of the transverse valley currents, which is based on
the pure crossed Andreev reflection (pCAR) in the superconducting hybrid junctions …

Seebeck and Nernst effects of pseudospin-1 fermions in the model under magnetic fields

W Duan - Physical Review B, 2023 - APS
We numerically study the Seebeck and Nernst effects of pseudospin-1 fermions in the α− T 3
model under magnetic fields by combining the nonequilibrium Green's function and the …

[HTML][HTML] Floquet modification of the bandgaps and energy spectrum in flat-band pseudospin-1 Dirac materials

A Iurov, M Mattis, L Zhemchuzhna, G Gumbs… - Applied Sciences, 2024 - mdpi.com
In this paper, we investigate the so-called electronic dressed states, a unified quasiparticle
resulting from the interaction between electrons in a two-dimensional material with an off …

Optical conductivity of gapped materials with a deformed flat band

A Iurov, L Zhemchuzhna, G Gumbs, D Huang - Physical Review B, 2023 - APS
We derive and discuss the optical conductivity of α-T 3 materials with a finite band gap in
their energy dispersions. In contrast with familiar α-T 3 materials, this constitutes a nontrivial …

Tunneling valley Hall effect induced by coherent geometric phase

W Zeng - Physical Review B, 2024 - APS
The tunneling valley Hall effect allows the electrical generation of the transverse valley-
dependent current in tunnel junctions, which is free from the Berry curvature but requires …

Majorana representation for topological edge states of massless Dirac fermion with nonquantized Berry phase

FR Pratama, T Nakanishi - Physical Review Research, 2024 - APS
We study the bulk-boundary correspondences for zigzag ribbons (ZRs) of massless Dirac
fermion in the two-dimensional α-T 3 lattice. By tuning the hopping parameter α∈[0, 1], the α …

Tunable valley filtering in dynamically strained lattices

A Filusch, H Fehske - Physical Review B, 2022 - APS
Mechanical deformations in α-T 3 lattices induce local pseudomagnetic fields of opposite
directionality for different valleys. When this strain is equipped with a dynamical drive, it …

Application of the WKB Theory to Investigate Electron Tunneling in Kek-Y Graphene

A Iurov, L Zhemchuzhna, G Gumbs, D Huang - Applied Sciences, 2023 - mdpi.com
In this paper, we have constructed a WKB approximation for graphene having a Y-shaped
Kekulé lattice distortion and a special folding of the K and K′ valleys, which leads to very …