English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Superconductivity of strongly correlated electrons on the honeycomb lattice

MPS-Authors
/persons/resource/persons184853

Plakida,  Nikolay M.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

1904.13126.pdf
(Preprint), 258KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Vladimirov, A. A., Ihle, D., & Plakida, N. M. (2019). Superconductivity of strongly correlated electrons on the honeycomb lattice. European Physical Journal B, 92(6): 135. doi:10.1140/epjb/e2019-100202-9.


Cite as: https://hdl.handle.net/21.11116/0000-0004-8A62-2
Abstract
A microscopic theory of the electronic spectrum and of superconductivity within the t-J model on the honeycomb lattice is developed. We derive the equations for the normal and anomalous Green functions in terms of the Hubbard operators by applying the projection technique. Superconducting pairing of d + id-type mediated by the antiferromagnetic exchange is found. The superconducting T-c as a function of hole doping exhibits a two-peak structure related to the van Hove singularities of the density of states for the two-band t-J model. At half-filling and for large enough values of the exchange coupling, gapless superconductivity may occur. For small doping the coexistence of antiferromagnetic order and superconductivity is suggested. It is shown that the s-wave pairing is prohibited, since it violates the constraint of no-double-occupancy.