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

C. M. Varma; Lijun Zhu

doi:10.1103/PhysRevLett.98.177004

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

C. M. Varma, Lijun Zhu

DOI 10.1103/PhysRevLett.98.177004 · Physical Review Letters

T1

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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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
BSCCO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	25	Pressure not reported	unknown
BSCCO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown