Nonmetallic low-temperature normal state of K0.7Fe1.46Se1.85Te0.15
Nonmetallic low-temperature normal state of K0.7Fe1.46Se1.85Te0.15
Wang, K.; Ryu, H.; Kampert, E.; Uhlarz, M.; Warren, J.; Wosnitza, J.; Petrovic, C.
The normal-state in-plane resistivity below the zero-field superconducting transition temperature Tc and the upper critical field μ0Hc2 (T) was measured by suppressing superconductivity in pulsed magnetic fields for K0.70Fe1.46Se1.85Te0.15. The normal-state resistivity ρab is found to increase logarithmically with decreasing temperature as (T/Tc) → 0. Similar to granular metals, our results suggest that a superconductor-insulator transition below zero-field Tc may be induced in high magnetic fields. This is related to the intrinsic real-space phase-separated states common to all inhomogeneous superconductors.
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Physical Review X 4(2014), 031018
DOI: 10.1103/PhysRevX.4.031018
ISSN: 2160-3308
Cited 5 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-20749
Publ.-Id: 20749