Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Ghosh, Asim Kumar"'
Publikováno v:
Journal of Physics: Condensed Matter 36, 325401 (2024)
Magnetic and topological properties along with quantum correlations in terms of several entanglement measures have been investigated for an antiferromagnetic spin-1/2 XY model in the presence of transverse magnetic field and XZX$-$YZY type of three-s
Externí odkaz:
http://arxiv.org/abs/2402.07590
Publikováno v:
Physica Scripta 99, 035944 (2024)
In this study, a spin-1/2 extended anisotropic XY chain has been introduced in which both time reversal and SU(2) symmetries are broken but $Z_2$ symmetry is preserved. Magnetic and topological phase diagrams in the parameter space have been drawn in
Externí odkaz:
http://arxiv.org/abs/2310.11243
Autor:
Sil, Arghya, Ghosh, Asim Kumar
Publikováno v:
J. Phys.: Condens. Matter 36 125401 (2024)
Existence of nontrivial topological phases in a tight binding Haldane-like model on the depleted Lieb lattice is reported. This two-band model is formulated by considering the nearest-neighbor, next-nearest-neighbor and next-next-nearest-neighbor hop
Externí odkaz:
http://arxiv.org/abs/2310.10286
Publikováno v:
J. Phys.: Condens. Matter 35, 335401 (2023)
Simple route of engineering topological phases for any desired value of winding and Chern numbers is found in the Su-Schrieffer-Heeger (SSH) model by adding a further neighbor hopping term of varying distances. It is known that the standard SSH model
Externí odkaz:
http://arxiv.org/abs/2303.04523
Autor:
Ghosh, Kalpita, Ghosh, Asim Kumar
The global pandemic due to the outbreak of COVID-19 ravages the whole world for more than two years in which all the countries are suffering a lot since December 2019. In order to control this ongoing waves of epidemiological infections, attempts hav
Externí odkaz:
http://arxiv.org/abs/2202.04917
Autor:
Deb, Moumita, Ghosh, Asim Kumar
Publikováno v:
Eur. Phys. J. B 93, 145 (2020)
Magnetic field induced multiple non-Dirac nodal-lines are found to emerge in the triplet dispersion bands of a frustrated spin-1/2 antiferromagnetic model on the CaVO lattice. Plaquette and bond operator formalisms have been employed to obtain the tr
Externí odkaz:
http://arxiv.org/abs/2005.02686
Autor:
Deb, Moumita, Ghosh, Asim Kumar
Publikováno v:
Journal of Magnetism and Magnetic Materials 533 (2021) 167968
A number of topological phases are found to emerge in the ferromagnetic Kitaev-Heisenberg model on CaVO lattice in the presence of Dzyaloshinskii-Moriya interaction. Heisenberg and Kitaev terms have been considered on nearest and next-nearest neighbo
Externí odkaz:
http://arxiv.org/abs/1912.07877
Autor:
Sil, Arghya, Ghosh, Asim Kumar
Publikováno v:
J. Phys.: Condens. Matter. 32 (2020) 205601
In this work, topological properties of a ferromagnetic Heisenberg model on a breathing kagome lattice are investigated extensively in the presence of Dzyaloshinskii-Moriya interaction. While the kagome ferromagnet hosts only a single first order top
Externí odkaz:
http://arxiv.org/abs/1911.12620
Publikováno v:
J. Phys.: Condens. Matter 32 (2020) 235301
We study the transport properties of Dirac electrons across a two-dimensional normal metal-barrier-normal metal (NBN) interfaces in monolayer borophane. We analyse the transmission probability with variation of the width of the barrier region, the in
Externí odkaz:
http://arxiv.org/abs/1909.07664
Autor:
Deb, Moumita, Ghosh, Asim Kumar
Publikováno v:
J. Phys.: Condens. Matter 31 (2019) 345601
Emergence of multiple topological phases with a series of Chern numbers, $\pm 1$, $\mp 1$, $\pm 2$, $\mp 2$, $\pm 3$ and $\mp 4$, are observed in a ferromagnetic Kitaev-Heisenberg-spin-anisotropic model on honeycomb lattice with further neighbor inte
Externí odkaz:
http://arxiv.org/abs/1903.11882