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research article
Orbital Currents in Extended Hubbard Models of High-T-c Cuprate Superconductors
Motivated by the recent report of broken time-reversal symmetry and zero momentum magnetic scattering in underdoped cuprates, we investigate under which circumstances orbital currents circulating inside a unit cell might be stabilized in extended Hubbard models that explicitly include oxygen orbitals. Using Gutzwiller projected variational wave functions that treat on an equal footing all instabilities, we show that orbital currents indeed develop on finite clusters and that they are stabilized in the thermodynamic limit if additional interactions, e.g., strong hybridization with apical oxygens, are included in the model.
Type
research article
Web of Science ID
WOS:000262355000062
Authors
Weber, Cedric
•
Laeuchli, Andreas
•
Mila, Frederic
•
Giamarchi, Thierry
Publication date
2009
Published in
Volume
102
Article Number
017005
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
November 30, 2010
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