Blar i Publikasjoner fra CRIStin på forfatter "Mandal, Ipsita"
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Correlated insulators in twisted bilayer graphene
Mandal, Ipsita; Yao, Jia; Mueller, Erich J. (Peer reviewed; Journal article, 2021-03)Experiments on graphene bilayers, where the top layer is rotated with respect to the one below, have displayed insulating behavior when the moiré bands are partially filled. We calculate the charge distributions in these ... -
Effect of Interactions on the Quantization of the Chiral Photocurrent for Double-Weyl Semimetals
Mandal, Ipsita (Peer reviewed; Journal article, 2020-06)The circular photogalvanic effect (CPGE) is the photocurrent generated in an optically active material in response to an applied AC electric field, and it changes sign depending on the chirality of the incident circularly ... -
Order parameter dynamics of the non-linear sigma model in the large N limit
Gemsheim, Sebastian; Mandal, Ipsita; Sengupta, Krishnendu; Wang, Zhiqiang (Peer reviewed; Journal article, 2020)We study non-equilibrium order parameter dynamics of the non-linear sigma model in the large N limit, using Keldysh formalism. We provide a scheme for obtaining stable numerical solution of the Keldysh saddle point equations ... -
Quench, thermalization, and residual entropy across a non-Fermi liquid to Fermi liquid transition
Haldar, Arijit; Haldar, Prosenjit; Bera, Surajit; Mandal, Ipsita; Banerjee, Sumilan (Peer reviewed; Journal article, 2020)We study the thermalization, after sudden and slow quenches, in an interacting model having a quantum phase transition from a Sachdev-Ye-Kitaev (SYK) non-Fermi liquid (NFL) to a Fermi liquid (FL). The model has SYK fermions ... -
Thermopower in an anisotropic two-dimensional Weyl semimetal
Mandal, Ipsita; Saha, Kush (Journal article, 2020-01)We investigate the generation of an electric current from a temperature gradient in a two-dimensional Weyl semimetal with anisotropy in both the presence and absence of a quantizing magnetic field. We show that the anisotropy ... -
Transmission in pseudospin-1 and pseudospin-3/2 semimetals with linear dispersion through scalar and vector potential barriers
Mandal, Ipsita (Peer reviewed; Journal article, 2020-09)We investigate the tunneling of pseudospin-1 and pseudospin-3/2 quasiparticles through a barrier consisting of both electrostatic and vector potentials, existing uniformly in a finite region along the transmission axis. ... -
Tunneling in Fermi systems with quadratic band crossing points
Mandal, Ipsita (Peer reviewed; Journal article, 2020-08)We investigate the tunneling of quasiparticles through a rectangular potential barrier of finite height and width, in 2d and 3d semimetals with band structures consisting of a quadratic band crossing point. We compute the ...