Normal state above the upper critical field in Fe1+y Te1-x (Se, S)x

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Aifeng Wang - , Brookhaven National Laboratory (Autor:in)
  • Erik Kampert - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • H. Saadaoui - , Paul Scherrer Institute (Autor:in)
  • H. Luetkens - , Paul Scherrer Institute (Autor:in)
  • Rongwei Hu - , Brookhaven National Laboratory, Rutgers - The State University of New Jersey, New Brunswick (Autor:in)
  • E. Morenzoni - , Paul Scherrer Institute (Autor:in)
  • J. Wosnitza - , Professur für Physik in hohen Magnetfeldern (gB/HZDR), Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • C. Petrovic - , Brookhaven National Laboratory (Autor:in)

Abstract

We have investigated the magnetotransport above the upper critical field (Hc2) in Fe1.14Te0.7Se0.3, Fe1.02Te0.61Se0.39, Fe1.05Te0.89Se0.11, and Fe1.06Te0.86S0.14. The μSR measurements confirm electronic phase separation in Fe1.06Te0.86S0.14, similar to Fe1+yTe1-xSex. Superconductivity is suppressed in high magnetic fields above 60 T, allowing us to gain insight into the normal-state properties below the zero-field superconducting transition temperature (Tc). We show that the resistivity of Fe1.14Te0.7Se0.3 and Fe1.02Te0.61Se0.39 above Hc2 is metallic as T→0, just like the normal-state resistivity above Tc. On the other hand, the normal-state resistivity in Fe1.05Te0.89Se0.11 and Fe1.06Te0.86S0.14 is nonmetallic down to lowest temperatures, reflecting the superconductor-insulator transition due to electronic phase separation.

Details

OriginalspracheEnglisch
Aufsatznummer184504
FachzeitschriftPhysical Review B
Jahrgang95
Ausgabenummer18
PublikationsstatusVeröffentlicht - 3 Mai 2017
Peer-Review-StatusJa