Zeeman and orbital limiting fields: Separated spin and charge degrees of freedom in cuprate superconductors

L. Krusin-Elbaum; G. Blatter; T. Shibauchi

doi:10.1103/PhysRevB.69.220506

← Back to search

Zeeman and orbital limiting fields: Separated spin and charge degrees of freedom in cuprate superconductors

L. Krusin-Elbaum, G. Blatter, T. Shibauchi

DOI 10.1103/PhysRevB.69.220506 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Recent in-plane thermal (Nernst) and interlayer (tunnelling) transport experiments in Bi2Sr2CaCu2O8+y high temperature superconductors report hugely different limiting magnetic fields. Based on pairing (and the uncertainty principle) combined with the definitions of the Zeeman energy and the magnetic length, we show that in the underdoped regime both fields convert to the same (normal state) pseudogap energy scale T* upon transformation as orbital and spin (Zeeman) critical fields, respectively. We reconcile these seemingly disparate findings invoking separated spin and charge degrees of freedom residing in different regions of a truncated Fermi surface.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown