Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Arunava Chakrabarti"'
Autor:
Sougata Biswas, Arunava Chakrabarti
Compact localized single particle eigenstates on a deterministic fractal substrate, modelled by a triangular Sierpinski gasket of arbitrarily large size, are unravelled and examined analytically. We prescribe an exact real space renormalization group
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::041393e1bf708216ae032ae7b9d37c47
We prove that, a suitable correlation between the system parameters can trigger topological phase transition and flat bands in a multi strand Creutz ladder network, when a staggered second neighbor interaction is included along the x axis. An appropr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a92621a0499f0a30343b99bd0c2fe970
http://arxiv.org/abs/2111.06347
http://arxiv.org/abs/2111.06347
Autor:
Arunava Chakrabarti, Subhajyoti Bid
We investigate the edge states and the topological phase transitions in a class of tight binding lattices in one dimension where a Su-Schrieffer-Heeger (SSH) model exists in disguise. The unit cells of such lattices may have an arbitrarily intricate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb0a298a8cc616df3be72f9f0f9bd77d
http://arxiv.org/abs/2108.09525
http://arxiv.org/abs/2108.09525
Publikováno v:
Scientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
Scientific Reports
Scientific Reports
We investigate a simple tight-binding Hamiltonian to understand the stability of spin-polarized transport of states with an arbitrary spin content in the presence of disorder. The general spin state is made to pass through a linear chain of magnetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8b85cc48dada648a1d7f31850cde97d
http://link.springer.com/article/10.1038/s41598-019-42316-5
http://link.springer.com/article/10.1038/s41598-019-42316-5
Autor:
Arunava Chakrabarti, Arkajyoti Maity
We investigate the quantum dynamics of wave packets in a class of decorated lattices, both quasiperiodic and random, where a nominal quasi-one dimensionality is introduced at local levels, bringing in a deterministic or even random variations in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f18c8bcf65ea7f19bce44b5d56528f64
Autor:
Arunava Chakrabarti, Sk Sajid
We investigate the spectral and transport properties of a two-arm tight-binding ladder perturbed by an external magnetic field following an Aubry-Andr\'e-Harper profile. The varying magnetic flux trapped in consecutive ladder-cells simulates an axial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79341b9b002ce6125f3a1df02e36284b
http://arxiv.org/abs/2009.06191
http://arxiv.org/abs/2009.06191
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 134:114911
We present an analytical method, based on a real space decimation scheme, to extract the exact eigenvalues of a macroscopically large set of pinned localized excitations in a Cayley tree fractal network. Within a tight binding scheme we exploit the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::726da571c9a1d10f5304a0e4a27381d6
https://doi.org/10.1016/j.physe.2021.114911
https://doi.org/10.1016/j.physe.2021.114911
A periodic network of connected rhombii, mimicking a spintronic device, is shown to exhibit an intriguing spin selective extreme localization, when submerged in a uniform out of plane electric field. The topological Aharonov Casher phase acquired by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a614f58a7de6ab3ea55bd4fdd38dcd3c
Flux-driven and geometry-controlled spin filtering for arbitrary spins in aperiodic quantum networks
Publikováno v:
Physical Review B. 98
We demonstrate that an aperiodic array of certain quantum networks comprising magnetic and non-magnetic atoms can act as perfect spin filters for particles with arbitrary spin state. This can be achieved by introducing minimal quasi-one dimensionalit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0301da231c07b19e5b92ba400f4a6fe8
https://doi.org/10.1103/physrevb.98.075415
https://doi.org/10.1103/physrevb.98.075415
Autor:
Subhransu Pan, Uday Sankar Das, Joydip Biswas, Amitendu De, Arunava Chakrabarti, Ajoy Mondal, Mathur Pal, Kousik Saha
Publikováno v:
Advances in Animal and Veterinary Sciences. 4:613-618
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76a873d1ccc8f768cd9cf313e1ba425d
https://doi.org/10.14737/journal.aavs/2016/4.12.613.618
https://doi.org/10.14737/journal.aavs/2016/4.12.613.618