Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Tyagi, Udai Prakash"'
Autor:
Tyagi, Udai Prakash, Goswami, Partha
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 and/or loss terms which are represented by complex on-site potentials
Externí odkaz:
http://arxiv.org/abs/2410.04812
Autor:
Tyagi, Udai Prakash, Goswami, Partha
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 the three-dimensional band structure split up into pairs of so-called We
Externí odkaz:
http://arxiv.org/abs/2406.08130
Autor:
Goswami, Partha, Tyagi, Udai Prakash
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-site electron-electron repulsion is reformulated in terms of a holonomic
Externí odkaz:
http://arxiv.org/abs/2311.00583
Autor:
Goswami, Partha, Tyagi, Udai Prakash
In this exceedingly short review article, we have provided some information on acoustic topological insulator for pedagogical purpose. Since, intrinsically acoustic systems do not have Kramers doublets due to spin-zero status, artificially acoustic s
Externí odkaz:
http://arxiv.org/abs/2308.05114
Autor:
Tyagi, Udai Prakash, Goswami, Partha
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 symmetry protected and the time reversal symmetry broken Bloch Hamiltonian.
Externí odkaz:
http://arxiv.org/abs/2306.07882
Autor:
Tyagi, Udai Prakash, Goswami, Partha
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 earlier. The problem of large on-site electron-electron repulsion was re
Externí odkaz:
http://arxiv.org/abs/2302.04039
Autor:
Goswami, Partha, Tyagi, Udai Prakash
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 purpose, we start with a low-energy two-dimensional, time-dependent H
Externí odkaz:
http://arxiv.org/abs/2207.02899
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 strong Rashba spin-orbit coupling(SOC) armed, and the time reversal symmet
Externí odkaz:
http://arxiv.org/abs/2205.15010
Autor:
Tyagi, Udai Prakash, Goswami, Partha
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 non-trivial spin texture in k-space is found tuneable by electric fie
Externí odkaz:
http://arxiv.org/abs/2205.11975
We model Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ (Bi2212) bilayer system by an inversion symmetry broken and time reversal non invariant Bloch Hamiltonian H. The pseudo-gap phase of the bilayer is assumed to be chiral d density wave ordered. The focal poi
Externí odkaz:
http://arxiv.org/abs/2103.12053