27 citations · 69 across the 11 of their papers we have counts for
11 papers
Nonreciprocal Acoustic and Optical Phonon Dispersion Mediated by Berry Curvature in Chiral Weyl Semimetals
Sanghita Sengupta
We investigate the phonon magnetochiral effect (PMCE) in chiral Weyl semimetals by deriving the nonreciprocal dispersion relations of both acoustic and non-polar optical phonons in…
Hyperfine interactions in open-shell planar -carbon nanostructures
Sanghita Sengupta, Thomas Frederiksen, Geza Giedke
We investigate hyperfine interaction (HFI) using density-functional theory for several open-shell planar -carbon nanostructures displaying magnetism. Our prototype struct…
Reply to "Comment on `Theory of Phonon-Assisted Adsorption in Graphene: Many-Body Infrared Dynamics' "
Sanghita Sengupta
Based on a new self-energy for atom-phonon interaction, preceding Comment argues about the insufficiency of the mathematical techniques within the Independent Boson Model (IBM) to…
Phonon magnetochiral effect of band-geometric origin in Weyl semimetals
Sanghita Sengupta, M. Nabil Y. Lhachemi, Ion Garate
The phonon magnetochiral effect consists of a nonreciprocity in the velocity or attenuation of acoustic waves when they propagate parallel and antiparallel to an external magnetic…
Anomalous Transition Magnetic Moments in two-dimensional Dirac Materials
Sanghita Sengupta, Madalina I. Furis, Oleg P. Sushkov +1
We show that the magnetic response of atomically thin materials with Dirac spectrum and spin-orbit interactions can exhibit strong dependence on electron-electron interactions. Whi…
Theory of Phonon-Assisted Adsorption in Graphene: Many-Body Infrared Dynamics
Sanghita Sengupta
We devise a theory of adsorption of low-energy atoms on suspended graphene membranes maintained at 10 K based on a model of atom-acoustic phonon interactions. Our primary technique…
Infrared Problem in Cold Atom Quantum Physisorption on 2D Materials
Sanghita Sengupta, Dennis P. Clougherty
Results from four different approximations to the phonon-assisted quantum adsorption rate for cold atoms on a 2D material are compared and contrasted: (1) a loop expansion (LE) bas…
Theory of liquid film growth and wetting instabilities on graphene
Sanghita Sengupta, Nathan S. Nichols, Adrian Del Maestro +1
We investigate wetting phenomena near graphene within the Dzyaloshinskii-Lifshitz-Pitaevskii theory for light gases composed of hydrogen, helium and nitrogen in three different geo…
Radiative Corrections to Quantum Sticking on Graphene
Sanghita Sengupta, Dennis P. Clougherty
We study the sticking rate of atomic hydrogen to suspended graphene using four different methods that include contributions from processes with multiphonon emission. We compare the…
Infrared Problem in Quantum Acoustodynamics
Dennis P. Clougherty, Sanghita Sengupta
Quantum electrodynamics (QED) provides a highly accurate description of phenomena involving the interaction of atoms with light. We argue that the quantum theory describing the int…
Infrared Dynamics of Cold Atoms on Hot Graphene Membranes
Sanghita Sengupta, Valeri N. Kotov, Dennis P. Clougherty
We study the infrared dynamics of low-energy atoms interacting with a sample of suspended graphene at finite temperature. The dynamics exhibits severe infrared divergences order by…