Topological Transition in the Fermi Surface of Cuprate Superconductors in the Pseudogap Regime

Details Topological Transition in the Fermi Surface of Cuprate Superconductors in the Pseudogap Regime Topological Transition in the Fermi Surface of Cuprate Superconductors in the Pseudogap Regime

2006-07-28

arxiv.org/abs/cond-mat/0607777v4

Phys. Rev. Lett. 98, 177004 (2007)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures. Published version

Scientific paper

10.1103/PhysRevLett.98.177004

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.

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