742 citations · 1.4k across the 35 of their papers we have counts for
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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…
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…
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…
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…
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…
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…
Generation of isolated flat bands with tunable numbers through Moiré engineering
Xiaoting Zhou, Yi-Chun Hung, Baokai Wang +1
Unlike the spin-1/2 fermions, the Lieb and Dice lattices both host triply-degenerate low-energy excitations. Here, we discuss Moiré structures involving twisted bilayers of these l…
Diverse electronic landscape of the kagome metal YbTi3Bi4
Anup Pradhan Sakhya, Brenden R. Ortiz, Barun Ghosh +8
Kagome lattices have emerged as an ideal platform for exploring exotic quantum phenomena in materials. Here, we report the discovery of Ti-based kagome metal YbTi3Bi4 which we char…
Role of surface termination in realizing well-isolated topological surface states within the bulk band gap in TlBiSe and TlBiTe
Bahadur Singh, Hsin Lin, R. Prasad +1
Electronic structures associated with the flat (polar) Se/Te- or Tl-terminated surfaces of TlBiSe and TlBiTe are predicted to harbor not only Dirac cone states, but also tr…
Topological phase transition and two dimensional topological insulators in Ge-based thin films
Bahadur Singh, Hsin Lin, R. Prasad +1
We discuss possible topological phase transitions in Ge-based thin films of Ge(BiSb)Te as a function of layer thickness and Bi concentration using the first…
Effects of iron doping on the topological insulator surfaces
L. A. Wray, Y. Xia, S. -Y. Xu +5
Topological insulators embody a newly discovered state of matter characterized by conducting spin-momentum locked surface states that span the bulk band gap. So far, most of the st…
A new platform for topological quantum phenomena : Topological Insulator states in thermoelectric Heusler-related ternary compounds
H. Lin, L. A. Wray, Y. Xia +4
Topological insulators (TI) realize a novel state of quantum matter that are distinguished by topological invariants of bulk band structure rather than spontaneously broken symmetr…