KIAS workshop "From correlated electrons to nanoscale materials"

at Korea Institute for Advanced Study (KIAS), Seoul, Korea

• Marcel Franz
  
  University of British Columbia
  
  

  Title

  Quantum oscillations from Fermi arcs

  Abstract

  When a metal is subjected to a strong magnetic field B nearly all measurable quantities exhibit oscillations periodic in 1/B. Such quantum oscillations represent a canonical probe of the Fermi surface a and constitute a defining property of a metal. In this talk I will describe a new mechanism for quantum oscillations which requires only finite segments of a Fermi surface to exist, as long as they are terminated by a pairing gap. Our results reconcile the recent breakthrough experiments showing quantum oscillations in a cuprate superconductor YBCO, with a well-established result of many angle resolved photoemission (ARPES) studies which consistently indicate ``Fermi arcs'' -- truncated segments of a Fermi surface -- in the normal state of cuprates.