Abstract
The Hall effect is investigated in detail for nonsuperconducting and superconducting FeTe thin films. The Hall coefficient commonly exhibits a sign reversal from positive in a high-temperature paramagnetic state to negative in a low-temperature antiferromagnetic state. Phenomenological analysis by a simple two-band Drude model indicates that hole mobility is significantly suppressed in the antiferromagnetic state. When suppression of the hole mobility is insufficient, superconductivity shows up in FeTe. This result strongly suggests that the itinerancy in both hole and electron channels is the essential factor for the occurrence of superconductivity in iron chalcogenide superconductors.
Original language | English |
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Article number | 023712 |
Journal | journal of the physical society of japan |
Volume | 80 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2011 Feb |
Externally published | Yes |
Keywords
- FeTe
- Hall effect
- Iron chalcogenide
- Thin films
- Two-band model
ASJC Scopus subject areas
- Physics and Astronomy(all)