34 citations · 173 across the 21 of their papers we have counts for
22 papers
Quantum oscillations in a solvable model of a Kondo insulator
Abhisek Samanta, Mohit Randeria, Sumilan Banerjee
We study the effects of interactions on the low-energy density of states (SdH) and magnetization (dHvA) quantum oscillations (QOs) in a Kondo insulator. Toward this end we introduc…
The nature of the "pseudogap" in the insulating phase of highly disordered superconductors
Mark Nikolaevsky, Abhisek Samanta, Nandini Trivedi +1
Disordered thin films undergoing a superconductor-insulator transition provide a controlled setting for studying pseudogap physics in the absence of competing electronic orders. Al…
Finite temperature precursors of Mottness in the Fermi Hubbard model
Sayantan Roy, Abhisek Samanta, Nandini Trivedi
We investigate finite-temperature precursors of Mottness in the repulsive Hubbard model above the spin-ordering temperature, using numerically exact determinant quantum Monte Carlo…
Symmetry broken states at high displacement fields in ABA trilayer graphene
Simrandeep Kaur, Unmesh Ghorai, Abhisek Samanta +4
In this Letter, we present a comprehensive study of magnetotransport in high-mobility trilayer graphene (TLG) devices under a transverse displacement field, focusing on symmetry-br…
Sign changes of the thermoelectric transport coefficient across the metal-insulator crossover in the doped Fermi Hubbard model
Sayantan Roy, Abhisek Samanta, Nandini Trivedi
We investigate the doping-dependence of the Seebeck coefficient, as calculated from the Kelvin formula, for the Fermi Hubbard model using determinantal quantum Monte Carlo simulati…
The two critical temperatures conundrum in LaSrCuO
Abhisek Samanta, Itay Mangel, Amit Keren +2
The in-plane and out-of-plane superconducting stiffness of LSCO rings appear to vanish at different transition temperatures, which contradicts thermodynamical expectation. In addit…
Effects of lattice geometry on thermopower properties of the repulsive Hubbard model
Willdauany C. de Freitas Silva, Maykon V. M. Araujo, Sayantan Roy +4
We obtain the Seebeck coefficient or thermopower , which determines the conversion efficiency from thermal to electrical energy, for the two-dimensional Hubbard model on differe…
Dynamic mass generation on two-dimensional electronic hyperbolic lattices
Noble Gluscevich, Abhisek Samanta, Sourav Manna +1
Free electrons hopping on hyperbolic lattices embedded on a negatively curved space can foster (a) Dirac liquids, (b) Fermi liquids, and (c) flat bands, respectively characterized…
Hall map and breakdown of Fermi liquid theory in the vicinity of a Mott insulator
Ilia Khait, Sauri Bhattacharyya, Abhisek Samanta +1
The Hall coefficient exhibits anomalous behavior in lightly doped Mott insulators. For strongly interacting electrons its computation has been challenged by analytical and numerica…
Phonon-induced modification of quantum criticality
Abhisek Samanta, Efrat Shimshoni, Daniel Podolsky
We study the effect of acoustic phonons on the quantum phase transition in the O() model. We develop a renormalization group analysis near (3+1) space-time dimensions and derive…
Subgap two-particle spectral weight in disordered -wave superconductors: Insights from mode coupling approach
Prathyush P. Poduval, Abhisek Samanta, Prashant Gupta +2
We study the two-particle spectral functions and collective modes of weakly disordered superconductors using a disordered attractive Hubbard model on square lattice. We show that t…
Tuning Superinductors by Quantum Coherence Effects for Enhancing Quantum Computing
Bo Fan, Abhisek Samanta, Antonio M. García-García
Research on spatially inhomogeneous weakly-coupled superconductors has recently received a boost of interest because of the experimental observation of a dramatic enhancement of th…
Many-body localized to ergodic transitions in a system with correlated disorder
Abhisek Samanta, Ahana Chakraborty, Rajdeep Sensarma
We study the transition from a many-body localized phase to an ergodic phase in spin chain with correlated random magnetic fields. Using multiple statistical measures like gap stat…
Characterization of collective excitations in weakly-coupled disordered superconductors
Bo Fan, Abhisek Samanta, Antonio M. García-García
Isolated islands in two-dimensional strongly-disordered and strongly-coupled superconductors become optically active inducing sub-gap collective excitations in the ac conductivity.…
Thermal effects on collective modes in disordered -wave superconductors
Abhisek Samanta, Anirban Das, Nandini Trivedi +1
We investigate the effect of thermal fluctuations on the two-particle spectral function for a disordered -wave superconductor in two dimensions, focusing on the evolution of the…
Hall coefficient of semimetals
Abhisek Samanta, Daniel P. Arovas, Assa Auerbach
A recently developed formula for the Hall coefficient [A. Auerbach, Phys. Rev. Lett. 121, 66601 (2018)] is applied to nodal line and Weyl semimetals (including graphene), and to sp…
Extremal statistics of entanglement eigenvalues can track the many-body localized to ergodic transition
Abhisek Samanta, Kedar Damle, Rajdeep Sensarma
Some interacting disordered many-body systems are unable to thermalize when the quenched disorder becomes larger than a threshold value. Although several properties of nonzero ener…
Two-particle spectral function for disordered s-wave superconductors: local maps and collective modes
Abhisek Samanta, Amulya Ratnakar, Nandini Trivedi +1
We make the first testable predictions for the local two-particle spectral function of a disordered s-wave superconductor, probed by scanning Josephson spectroscopy (sjs), providin…
Landau level diagram and the continuous rotational symmetry breaking in trilayer graphene
Biswajit Datta, Hitesh Agarwal, Abhisek Samanta +5
The sequence of the zeroth Landau levels (LLs) between filling factors =-6 to 6 in ABA-stacked trilayer graphene (TLG) is unknown because it depends sensitively on the non-unifo…
Strong electronic interaction and multiple quantum Hall ferromagnetic phases in trilayer graphene
Biswajit Datta, Santanu Dey, Abhisek Samanta +5
There is an increasing interest in the electronic properties of few layer graphene as it offers a platform to study electronic interactions because the dispersion of bands can be t…
Superconductivity from Doublon Condensation in the Ionic Hubbard Model
Abhisek Samanta, Rajdeep Sensarma
In the ionic Hubbard model, the onsite repulsion , which drives a Mott insulator and the ionic potential , which drives a band insulator, compete with each other to open up a…
Fermi Normal Coordinates and Fermion Curvature Couplings in General Relativity
Anshuman Dey, Abhisek Samanta, Tapobrata Sarkar
We study gravitational curvature effects in circular and radial geodesics in static, spherically symmetric space-times, using Fermi normal coordinates. We first set up these coordi…