106 citations · 210 across the 9 of their papers we have counts for
6 papers · 1 filter
Ab initio study of exciton insulator phase: Emergent -wave spin textures from spontaneous excitonic condensation
Fang Zhang, Jiawei Ruan, Gurjyot Sethi +2
An excitonic insulator (EI) is a correlated many-body state of electron-hole pairs, potentially leading to high-temperature condensate and superfluidity. Despite ev…
Graph Theorem for Chiral Exact Flat Bands at Charge Neutrality
Gurjyot Sethi, Bowen Xia, Dongwook Kim +3
Chiral exact flat bands (FBs) at charge neutrality have attracted much recent interest, presenting an intriguing condensed-matter system to realize exact many-body phenomena, as sp…
Orbital Design of Flat Bands in Non-Line-Graph Lattices via Line-Graph Wavefunctions
Hang Liu, Gurjyot Sethi, Sheng Meng +1
Line-graph (LG) lattices are known for having flat bands (FBs) from the destructive interference of Bloch wavefunctions encoded in pure lattice symmetry. Here, we develop a generic…
Flat-Bands-Enabled Triplet Excitonic Insulator in a Di-atomic Kagome Lattice
Gurjyot Sethi, Yinong Zhou, Linghan Zhu +2
The excitonic insulator (EI) state is a strongly correlated many-body ground state, arising from an instability in the band structure towards exciton formation. We show that the fl…
Excited quantum Hall effect: enantiomorphic flat bands in a Yin-Yang Kagome lattice
Yinong Zhou, Gurjyot Sethi, Hang Liu +2
Quantum Hall effect (QHE) is one of the most fruitful research topics in condensed-matter physics. Ordinarily, the QHE manifests in a ground state with time-reversal symmetry broke…
Orbital design of topological insulators from two-dimensional semiconductors
Lei Gao, Jia-Tao Sun, Gurjyot Sethi +3
Two-dimensional (2D) materials have attracted much recent attention because they exhibit various distinct intrinsic properties/functionalities, which are, however, usually not inte…