742 citations · 1.4k across the 35 of their papers we have counts for
35 papers
Temperature Dependent Evolution of the Electronic Structure in EuZn2As2 across the Neel Transition
Milo Sprague, Anup Pradhan Sakhya, Barun Ghosh +8
Magnetoresistive materials have been tremendously important for the development of magnetic memory storage and spintronic devices. Recently, the antiferromagnetic EuX2Pn2 compounds…
Extending Topological Bound on Quantum Weight Beyond Symmetry-Protected Topological Phases
Yi-Chun Hung, Yugo Onishi, Hsin Lin +2
The quantum metric encodes the geometric structure of Bloch wave functions and governs a wide range of physical responses. Its Brillouin-zone integral, the quantum weight, appears…
Quantum Geometry of Moiré Flat Bands Beyond the Valley Paradigm
Xiaoting Zhou, Yi-Chun Hung, Arun Bansil
Flat bands in moiré superlattices provide a fertile ground for correlated and topological phases, governed by their quantum geometric properties. While the valley-based paradigm ca…
Breakdown of Topological Inheritance and Twist-Induced Quantum Geometry Reconfiguration in Moiré Flat Bands
Yi-Chun Hung, Xiaoting Zhou, Arun Bansil
Since the inception of moiré quantum matter, a foundational tenet of the field has been that the quantum geometry of emergent flat bands is faithfully inherited from the low-energy…
Layer-dependent antiferromagnetic Chern and axion insulating states in UOTe
Sougata Mardanya, Barun Ghosh, Mengke Liu +8
Magnetic topological insulators have received significant interest due to their dissipationless edge states, which promise advances in energy-efficient electronic transport. Howeve…
Incommensurate magnetic order drives singular angular magnetoresistance in a Weyl semimetal
X. Yao, P. Chen, R. Verma +15
We demonstrate that a multi- incommensurate magnetic state in the Weyl semimetal CeAlGe gives rise to singular angular magnetoresistance (SAMR), an electrical-transport…
Giant Shift Current in Electrically-Tunable Superlattice Bilayer Graphene
Nabil Atlam, Swati Chaudhary, Arpit Raj +4
Recent introduction of superlattice potentials has opened new avenues for engineering tunable electronic band structures featuring topologically nontrivial moiré-like bands. Here w…
Tunable Competing Electronic Orders in Double Quantum Spin Hall Superlattices
Yi-Chun Hung, Chen-Hsuan Hsu, Arun Bansil
Competing superconducting (SC) and density-wave orders are of key importance in generating unconventional superconductivity and emergent electronic responses. Quasi-one-dimensional…
Complex electronic topography and magnetotransport in an in-plane ferromagnetic kagome metal
Anup Pradhan Sakhya, Richa Pokharel Madhogaria, Barun Ghosh +11
The intricate interplay between flat bands, Dirac cones, and magnetism in kagome materials has recently attracted significant attention from materials scientists, particularly in c…
Wavefunction-Free Approach for Predicting Nonlinear Responses in Weyl Semimetals
Mohammad Yahyavi, Ilya Belopolski, Yuanjun Jin +15
By sidestepping the intractable calculations of many-body wavefunctions, density functional theory (DFT) has revolutionized the prediction of ground states of materials. However, p…
Observation of the Axion quasiparticle in 2D MnBiTe
Jian-Xiang Qiu, Barun Ghosh, Jan Schütte-Engel +32
In 1978, Wilczek and Weinberg theoretically discovered a new boson-the Axion-which is the coherent oscillation of the field in QCD. Its existence can solve multiple fundamental…
Diverse electronic topography in a distorted kagome metal LaTi3Bi4
Anup Pradhan Sakhya, Brenden R. Ortiz, Barun Ghosh +9
Recent reports on a family of kagome metals of the form LnTi3Bi4 (Ln = Lanthanide) has stoked interest due to the combination of highly anisotropic magnetism and a rich electronic…
Topological Nature of Orbital Chern Insulators
Yueh-Ting Yao, Chia-Hung Chu, Arun Bansil +2
Ground state topologies in quantum materials have unveiled many unique topological phases with novel Hall responses. Recently, the orbital Hall effect in insulators has suggested t…
Geometry-Driven Moiré Engineering in Twisted Bilayers of High-Pseudospin Fermions
Yi-Chun Hung, Xiaoting Zhou, Arun Bansil
Moiré engineering offers new pathways for manipulating emergent states in twisted layered materials and lattice-mismatched heterostructures. With the key role of the geometry of th…
Engineering Majorana Kramers Pairs In Synthetic High Spin Chern Insulators
Yi-Chun Hung, Chen-Hsuan Hsu, Arun Bansil
High spin-Chern-number topological phases provide a promising low-dimensional platform for realizing double-helical edge states. In this letter, we show how these edge states can h…
Effects of Four-Phonon Scattering and Wave-like Phonon Tunneling Effects on Thermoelectric Properties of Mg2GeSe4 using Machine Learning
Hao-Jen You, Yi-Ting Chiang, Arun Bansil +1
We present a machine-learning interatomic potential (MLIP) framework, which substantially accelerates the prediction of lattice thermal conductivity for both particle-like and wave…
Interlayer Charge-density-wave Vector Phase Induced Structural Chirality
Sen Shao, Wei-Chi Chiu, Tao Hou +21
Chiral charge density waves (CDWs) have attracted intense interest due to their exotic quantum properties, yet the microscopic origin of structural chirality emerging from correlat…
Topological Orbital Hall Effect
Baokai Wang, Yi-Chun Hung, Hsin Lin +3
The orbital Hall effect (OHE) is attracting recent interest due to its fundamental science implications and potential applications in orbitronics and spintronics. Unlike the spin H…
A topological Hund nodal line antiferromagnet
Xian P. Yang, Yueh-Ting Yao, Pengyu Zheng +21
The interplay of topology, magnetism, and correlations gives rise to intriguing phases of matter. In this study, through state-of-the-art angle-resolved photoemission spectroscopy,…
Observation of paramagnetic spin-degeneracy lifting in EuZn2Sb2
Milo X. Sprague, Sabin Regmi, Barun Ghosh +9
Taken together, time-reversal and spatial inversion symmetries impose a two-fold spin degeneracy of the electronic states in crystals. In centrosymmetric materials, this degeneracy…
An antiferromagnetic diode effect in even-layered MnBi2Te4
Anyuan Gao, Shao-Wen Chen, Barun Ghosh +26
In a PN junction, the separation between positive and negative charges leads to diode transport. In the past few years, the intrinsic diode transport in noncentrosymmetric polar co…
Probing quantum geometry through optical conductivity and magnetic circular dichroism
Barun Ghosh, Yugo Onishi, Su-Yang Xu +3
Probing ground-state quantum geometry and topology through optical response is not only of fundamental interest, but it can also offer several practical advantages. Here, using fir…
Feature-energy duality of topological boundary states in multilayer quantum spin Hall insulator
Yueh-Ting Yao, Xiaoting Zhou, Yi-Chun Hung +3
Gapless topological boundary states characterize nontrivial topological phases arising from the bulk-boundary correspondence in symmetry-protected topological materials, such as th…
Electronic structure in a transition metal dipnictide TaAs2
Sabin Regmi, Cheng-Yi Huang, Mojammel A. Khan +11
The family of transition metal dipnictides (TMDs) has been of theoretical and experimental interest because this family hosts topological states and extremely large magnetoresistan…