324 citations · 553 across the 20 of their papers we have counts for
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Geometric bound on structure factor
Yugo Onishi, Alexander Avdoshkin, Liang Fu
We show that a quadratic form of quantum geometric tensor in -space sets a bound on the term in the static structure factor at small . Bands that saturate…
Topological bound on structure factor
Yugo Onishi, Liang Fu
We show that the static structure factor of general many-body systems with symmetry has a lower bound determined only by the ground state Chern number. Our bound relies only…
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…
Quantum weight: A fundamental property of quantum many-body systems
Yugo Onishi, Liang Fu
We introduce the concept of quantum weight as a ground state property of quantum many-body systems that is encoded in the static structure factor and characterizes density fluctuat…
Quantum weight
Yugo Onishi, Liang Fu
We introduce the concept of quantum weight as a fundamental property of insulating states of matter that is encoded in the ground-state static structure and measures quantum fluctu…
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…
Universal relation between energy gap and dielectric constant
Yugo Onishi, Liang Fu
We establish a universal relation between the energy gap and the static dielectric constant for all insulating states. This relation yields an upper bound on the energy gap, which…