Zobrazeno 1 - 10
of 13
pro vyhledávání: '"I. V. Sankar"'
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
Abstract The Holstein-Hubbard model with Gaussian phonon anharmonicity is studied in one-dimension at half filling using a variational method based on a series of canonical transformations. A fairly accurate phonon state is chosen to average the tran
Externí odkaz:
https://doaj.org/article/71592300d934439b9147a0be39535dfd
Publikováno v:
Journal of Magnetism and Magnetic Materials. 418:242-247
The problem of a parabolically confined two-dimensional semiconductor GaAs quantum dot with two interacting electrons in the presence of an external magnetic field and the spin-Zeeman interaction is studied using a method of numerical diagonalization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c1d50e9cf68c8034f150ebf5b737a23
https://doi.org/10.1016/j.jmmm.2016.04.015
https://doi.org/10.1016/j.jmmm.2016.04.015
Autor:
I. V. Sankar, Ashok Chatterjee
Publikováno v:
Physica B: Condensed Matter. 489:17-22
The quantum phase transition from a spin-density wave phase to a charge-density wave phase is studied within the framework of the one-dimensional Holstein-Hubbard model. The phonons are first eliminated by using a variational phonon state and the eff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee8b27edcdc79cd7eff33690ee6a169b
https://doi.org/10.1016/j.physb.2016.02.027
https://doi.org/10.1016/j.physb.2016.02.027
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 73:175-180
The persistent current in the ground state of a quantum ring threaded by a magnetic flux is calculated within the framework of the Holstein-Hubbard model. It is found that the persistent current is suppressed by both the electron–electron and elect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f49896408b1777edf41711df83aadf7
https://doi.org/10.1016/j.physe.2015.05.029
https://doi.org/10.1016/j.physe.2015.05.029
Publikováno v:
Materials Today: Proceedings. 2:4495-4498
The persistent current for polaronic transport in a one dimensional Holstein-Hubbard ring is studied in the presence of Rashba spin orbit (RSO) interaction. The energy is calculated within the Hartree-Fock approximation, using Lang-Firsov transformat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08740f5933ea7433dd822243f6fcaa1f
https://doi.org/10.1016/j.matpr.2015.10.060
https://doi.org/10.1016/j.matpr.2015.10.060
Publikováno v:
Scientific Reports
Scientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
Scientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
The Holstein-Hubbard model with Gaussian phonon anharmonicity is studied in one-dimension at half filling using a variational method based on a series of canonical transformations. A fairly accurate phonon state is chosen to average the transformed H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd2cc8a7bcbe584d98741a01971c277f
http://europepmc.org/articles/PMC5476603
http://europepmc.org/articles/PMC5476603
Publikováno v:
Nano. 14:1930009
A comprehensive review of the fabrication process, fundamental properties and functionalities and device applications of heterogeneously integrated two-dimensional (2D) materials is provided. An extensive library of atomic 2D materials with selectabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a1dd890de23513c85fcc281937eaa3f
https://doi.org/10.1142/s1793292019300093
https://doi.org/10.1142/s1793292019300093
Publikováno v:
Scientific Reports
Persistent current in a correlated quantum ring threaded by an Aharonov-Bohm flux is studied in the presence of electron-phonon interactions and Rashba spin-orbit coupling. The quantum ring is modeled by the Holstein-Hubbard-Rashba Hamiltonian and th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41b026775271ab1c90b162827d54bf39
https://doi.org/10.1038/srep20056
https://doi.org/10.1038/srep20056
Publikováno v:
Physica C: Superconductivity. 480:55-60
The nature of self-trapping transition is investigated within the framework of an extended Holstein–Hubbard model in two dimensions using a variational method. We perform a series of canonical transformations including phonon coherence effect that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39a70fd2c9af6c0db9e5853ab6a1f487
https://doi.org/10.1016/j.physc.2012.05.004
https://doi.org/10.1016/j.physc.2012.05.004
Autor:
Ashok Chatterjee, I. V. Sankar
Publikováno v:
The European Physical Journal B. 87
The two-dimensional extended Holstein-Hubbard model is investigated in the strong correlation regime to study the nature of self-trapping transition and the polaron phase diagram in the absence of superconductivity. Using a series of canonical transf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e91d1456851d20968394bad5719d6278
https://doi.org/10.1140/epjb/e2014-50146-9
https://doi.org/10.1140/epjb/e2014-50146-9