12 papers
An investigation of the two-dimensional non-Hermitian Su-Schrieffer-Heeger Model
Udai Prakash Tyagi, Partha Goswami
This communication presents an examination of a two-dimensional, non-Hermitian Su -Schrieffer-Heeger (SSH) model, which is differentiated from its conventional Hermitian counterpar…
Two-dimensional non-Hermitian Su-Schrieffer-Heeger Model
Udai Prakash Tyagi, Partha Goswami
A particle-hole symmetry protected 2D non-Hermitian Su-Schrieffer-Heeger (SSH) model is investigated. This version differs from the usual Hermitian version by the inclusion of gain…
Anomalous Nernst Effect in Ferromagnetic Weyl Semimetal
Udai Prakash Tyagi, Partha Goswami
In a three-dimensional Dirac semimetal the time reversal symmetry (TRS) or the inversion symmetry (IS) is not broken. With either of these symmetries broken, the Dirac points in th…
Theoretical Investigation of the Periodic Anderson Hamiltonian of Samarium Hexaboride
Partha Goswami, Udai Prakash Tyagi
The periodic Anderson Hamiltonian of the bulk samarium hexaboride is investigated in this article assuming the presence of ferromagnetic impurities (FM). The problem of large on-si…
Some information on acoustic topological insulator
Partha Goswami, Udai Prakash Tyagi
In this exceedingly short review article, we have provided some information on acoustic topological insulator for pedagogical purpose. Since, intrinsically acoustic systems do not…
On Weyl Nodes in Ferromagnetic Weyl Semimetal
Udai Prakash Tyagi, Partha Goswami
The ferromagnetic Weyl semimetals, such as Co3Sn2S2, feature pairs of Weyl points characterized by the opposite chiralities.We model this type of semimetals by the inversion symmet…
Quantum anomalous Hall effect induced by circularly polarized light on samarium hexaboride surface
Udai Prakash Tyagi, Partha Goswami
We examine a time-dependent, surface Hamiltonian for the 3D compound samarium hexaboride based on the slave boson protocol linked version of the periodic Anderson model reported ea…
Tunable Radiation Field Aided Quantum Spin Hall Phase in Bi2Se3Thin Film
Partha Goswami, Udai Prakash Tyagi
We show fledgling quantum spin Hall phase by the normal incidence of near-infrared circularly polarized radiation field on Bismuth Selenide doped with magnetic impurities. For this…
Fledgling quantum spin Hall effect in pseudo gap phase of Bi2212
Udai Prakash Tyagi, Kakoli Bera, Partha Goswami
We study the emergence of the quantum spin Hall (QSH) states for the pseudo-gap (PG) phase of Bi2212 bilayer system, assumed to be D-density wave(DDW) ordered, starting with a stro…
Electron spin orientation dependence on momentum in pseudo gap phase of Bi2212
Udai Prakash Tyagi, Partha Goswami
The aim of the paper is to study the electron spin direction dependence on momentum due to the presence of Rashba spin-orbit coupling in the pseudo-gap phase of Bi2212 bilayer. The…
On strong f-electron localization effect in topological kondo insulator
U. P. Tyagi, Kakoli Bera, Partha Goswami
We study strong f-electron localization effect on surface state of a generic topological Kondo insulator (TKI) system by performing a mean-field theoretic (MFT) calculation within…
Chiral d density wave ordered pseudo gap phase of BiSrCaCuO bilayer. Spin texture and Dzyaloshinskii Moriya interaction
Kakoli Bera, Udai Prakash Tyagi, Partha Goswami
We model BiSrCaCuO (Bi2212) bilayer system by an inversion symmetry broken and time reversal non invariant Bloch Hamiltonian H. The pseudo-gap phase of the bila…