Speaker
Dr
Martin Mansson
(Laboratory for Solid State Physics, ETH Zurich)
Description
We have performed an ARPES investigation of FeTe single crystals/films, as well as thin fims of the the novel superconductor FeTeOx [Y.F. Nie et al., Phys. Rev. B 82, 020508(R) (2010)]. Our results from the single crystals reflect the previously reported Fermi surface pocket around the X-point [(pi, 0)], possibly connected to a spin-density wave (SDW) order [Y. Xia, PRL 103, 037002 (2009)]. Unlike this previous report, our results also reveal the presence of an energy gap, which would be expected from the SDW order. The temperature dependence shows that the gap closes in the rough vicinity of the magnetic transition temperature, supporting it's interpretation as reflecting the SDW state. Finally, we were also able to acquire ARPES data from cleaved FeTe and FeTeOx thin films, where the FeTe films display similar features as the bulk samples.
Funding Source:
DOE-BES through contract DE-FG02-00ER45801 and the Swiss National Science Foundation (Project 6, NCCR MaNEP).
Please specify the session
Multiple order parameter system
Please specify poster or talk
Poster
Primary author
Dr
Martin Mansson
(Laboratory for Solid State Physics, ETH Zurich)
Co-authors
Prof.
Barrett O. Wells
(Department of Physics, University of Connecticut, USA)
Dr
Christof Niedermayer
(LNS, PSI)
Dr
Genda Gu
(Brookhaven National Laboratory, Upton, NY, USA)
Prof.
Joseph I. Budnick
(Department of Physics, University of Connecticut, USA)
Dr
Yasmine Sassa
(Laboratory for Solid State Physics, ETH Zurich)
Dr
Yuefeng Nie
(Department of Physics, University of Connecticut, USA)
