97 citations · 276 across the 21 of their papers we have counts for
5 papers · 1 filter
Obstructed Cooper pairs in flat band systems -- weakly-coherent superfluids and exact spin liquids
Tamaghna Hazra, Nishchhal Verma, Jörg Schmalian
Superconductivity in a partially filled flat band presents a vexing conceptual hurdle because the absence of a Fermi surface precludes a weak-coupling regime where one can extend i…
Measuring kinetic inductance and superfluid stiffness of two-dimensional superconductors using high-quality transmission-line resonators
Mary Kreidel, Xuanjing Chu, Jesse Balgley +8
The discovery of van der Waals superconductors in recent years has generated a lot of excitement for their potentially novel pairing mechanisms. However, their typical atomic-scale…
Quantum Metric in Step Response
Nishchhal Verma, Raquel Queiroz
Quantum geometry of Bloch wavefunctions has gained considerable interest with the discovery of moiré materials that exhibit bands flattened by quantum interference. The quantum met…
Topologically protected flatness in chiral moiré heterostructures
Valentin Crépel, Peize Ding, Nishchhal Verma +2
The observation of delicate correlated phases in twisted heterostructures of graphene and transition metal dichalcogenides suggests that moiré flat bands are intrinsically resilien…
Instantaneous response and quantum geometry of insulators
Nishchhal Verma, Raquel Queiroz
We present the time-dependent Quantum Geometric Tensor (tQGT) as a comprehensive tool for capturing the geometric character of insulators observable within linear response. We show…