21 citations · 53 across the 15 of their papers we have counts for
6 papers · 1 filter
Vacancy-driven topological transition of a Chern insulator
Peize Ding, Raquel Queiroz
We develop a microscopic description of the strong-disorder transition in a Chern insulator using the in-gap ring states bound to individual vacancies. Using Green's function forma…
The quantum geometry of the chemical bond
Gabrielle Carrel, Nishchhal Verma, Fatmagül Katmer +2
Electronic properties of materials depend both on band energies and quantum geometry of electronic states. We relate bonding indices to the quantum geometric tensor (QGT), showing…
Cell Natural Orbitals in Quantum Materials
Harshitra Mahalingam, Nishchhal Verma, Daniel Muñoz-Segovia +1
Understanding correlated quantum matter starts with an accurate model of the single-particle states that interact at low energies: their dispersion, band geometry, orbital content…
Cell Natural Orbitals in Interacting Topological Bands
Nishchhal Verma, Harshitra Mahalingam, Daniel Muñoz-Segovia +1
Topological bands exhibit obstruction to exponentially localized and symmetric Wannier functions, challenging the standard paradigm of representing projected interactions in terms…
Long and short time linear response of metals: a geometric approach
Nishchhal Verma, Raquel Queiroz
The time-dependent quantum geometric tensor, which captures dipole fluctuations of bound electrons, is essential for understanding the electronic properties of insulators, supercon…
Plasmon dynamics in graphene
Suheng Xu, Birui Yang, Nishchhal Verma +15
Plasmon are collective oscillations of mobile electrons with dynamics controlled by their charge stiffness("Drude weight"). Using terahertz spacetime metrology, we probe Plasmon dy…