Tunable moiré materials for probing Berry physics and topology

PC Adak, S Sinha, A Agarwal… - Nature Reviews Materials, 2024 - nature.com
Berry curvature physics and quantum geometric effects have been instrumental in
advancing topological condensed matter physics in recent decades. Although Landau level …

Quantum geometry induced third-order nonlinear transport responses

D Mandal, S Sarkar, K Das, A Agarwal - Physical Review B, 2024 - APS
Nonlinear transport phenomena offer an exciting probe into the band geometry and
symmetry properties of a system. While most studies on nonlinear transport have looked at …

Dominance of Extrinsic Scattering Mechanisms in the Orbital Hall Effect: Graphene, Transition Metal Dichalcogenides, and Topological Antiferromagnets

H Liu, D Culcer - Physical Review Letters, 2024 - APS
The theory of the orbital Hall effect (OHE), a transverse flow of orbital angular momentum
(OAM) in response to an electric field, has concentrated on intrinsic mechanisms. Here …

Valleytronics: Fundamental Challenges and Materials Beyond Transition Metal Chalcogenides

R Xu, Z Zhang, J Liang, H Zhu - Small, 2024 - Wiley Online Library
Valleytronics, harnessing the valley degree of freedom in the momentum space, is a
potential energy‐efficient approach for information encoding, manipulation, and storage …

Tunneling chirality Hall effect in type-I Weyl semimetals

W Zeng - Physical Review B, 2024 - APS
We propose a tilt-assisted tunneling chirality Hall effect in the normal metal-superconductor
(NS) junctions based on the time-reversal-broken type-I Weyl semimetals. It is found that the …

[HTML][HTML] Planar Hall plateau in magnetic Weyl semimetals

L Li, C Cui, RW Zhang, ZM Yu, Y Yao - Science Bulletin, 2024 - Elsevier
Despite the rapid progress in the study of planar Hall effect (PHE) in recent years, all the
previous works only showed that the PHE is connected to local geometric quantities, such as …

Intrinsic nonlinear thermal Hall transport of magnons: A quantum kinetic theory approach

H Varshney, R Mukherjee, A Kundu, A Agarwal - Physical Review B, 2023 - APS
We present a systematic study of the nonlinear thermal Hall responses in bosonic systems
using the quantum kinetic theory framework. We demonstrate the existence of an intrinsic …

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 …

Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect

RB Atencia, A Agarwal, D Culcer - arXiv preprint arXiv:2403.07055, 2024 - arxiv.org
The investigation of orbital angular momentum (OAM) of delocalised Bloch electrons has
significantly advanced our understanding of magnetic, transport, and optical phenomena in …

Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect

R Burgos Atencia, A Agarwal, D Culcer - Advances in Physics: X, 2024 - Taylor & Francis
The investigation of orbital angular momentum (OAM) of delocalised Bloch electrons has
advanced our understanding of magnetic, transport, and optical phenomena in crystals …