Topological Transition in the Fermi Surface of Cuprate Superconductors in the Pseudogap Regime
arXiv:cond-mat/0607777 · doi:10.1103/PhysRevLett.98.177004
Abstract
The angle-resolved photoemission spectroscopy studies on cuprates in the pseudogap region reveal an extraordinary topological transition in which the ground state changes from one with a normal Fermi surface to one with four Fermi points. Such a state is not possible without some symmetry breaking, which allows interference between one-particle basis states that is normally forbidden. We also show that the experimental results are quantitatively given without any free parameters by a theory and discuss the implications of the results.
arXiv comment4 pages, 3 figures. Published version
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