Orbital Currents in Extended Hubbard Models of High-Tc Cuprate Superconductors

C. Weber, A. Läuchli, F. Mila, T. Giamarchi

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101 Citations (Scopus)

Abstract

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.
Original languageEnglish
Article number17005
Number of pages4
JournalPhysical Review Letters
Volume102
Issue number1
DOIs
Publication statusPublished - 8 Jan 2009

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