Strong correlations in the two-dimensional extended Holstein-Hubbard model

dc.contributor.author	Sankar, I. V.
dc.contributor.author	Chatterjee, Ashok
dc.date.accessioned	2022-03-27T11:58:32Z
dc.date.available	2022-03-27T11:58:32Z
dc.date.issued	2013-03-15
dc.description.abstract	The Holstein-Hubbard model is studied in two dimensions to explore the nature of polarons as a function of hole concentration in the strong correlation regime. A series of canonical transformations is performed to obtain an effective extended Hubbard model which, in the strong on-site electron-electron correlation regime, transforms into a t-J model and is solved using the mean-field Hartree-Fock approximation (HFA). It is shown that the hopping parameter which is related to the bandwidth of the polaron is very small for low (x ≈ 0) and high (x ≈ 1) hole concentrations whereas the hopping parameter is much larger for the intermediate hole concentrations. © 2013 American Institute of Physics.
dc.identifier.citation	AIP Conference Proceedings. v.1512
dc.identifier.issn	0094243X
dc.identifier.uri	10.1063/1.4791448
dc.identifier.uri	http://aip.scitation.org/doi/abs/10.1063/1.4791448
dc.identifier.uri	https://dspace.uohyd.ac.in/handle/1/15097
dc.subject	Cuprates
dc.subject	High-Tc Superconductors
dc.subject	Holstein-Hubbard model
dc.subject	Strong Correlations
dc.subject	t-J model, Polarons
dc.title	Strong correlations in the two-dimensional extended Holstein-Hubbard model
dc.type	Conference Proceeding. Conference Paper
dspace.entity.type

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