106 citations · 210 across the 9 of their papers we have counts for
9 papers
Quantum Theory of Exciton Magnetic Moment: Interaction and Topological Effects
Gurjyot Sethi, Jiawei Ruan, Fang Zhang +4
Combining magnetometry with optical spectroscopy has uncovered novel quantum phenomena and is emerging as a powerful probe of quantum materials. However, the theory of the magnetic…
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…
Anomalous Bilayer Quantum Hall Effect
Gurjyot Sethi, D. N. Sheng, Feng Liu
In parallel to the condensed-matter realization of quantum Hall (Chern insulators), quantum spin Hall (topological insulators), and fractional quantum Hall (fractional Chern insula…
Excitonic Condensate in Flat Valence and Conduction Bands of Opposite Chirality
Gurjyot Sethi, Martin Cuma, Feng Liu
Excitonic Bose-Einstein condensation (EBEC) has drawn increasing attention recently with the emergence of 2D materials. A general criterion for EBEC, as expected in an excitonic in…
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…