Speaker
Toni Shiroka
(ETH Zurich and Paul Scherrer Institut, Villigen)
Description
The actinide superconductor ThFeAsN exhibits a $T_c$ of 30 K without doping or external pressure. Formally similar to LaFeAsO and predicted to be an antiferromagnet, surprisingly, the new material does not show any magnetic order.
Based on results of a series of ambient- and high-pressure experiments and DFT calculations [1,2], we show how ThFeAsN combines the peculiarities of unconventional superconductivity with those of correlated electron systems. We further compare the role of charge doping vs. structural distortions and argue why the “structural route” to superconductivity is so unusual in iron-based compounds.
- T. Shiroka et al., Nature Comm. 8, 156 (2017).
- N. Barbero et al., Phys. Rev. B 97, 140506(R) (2018).
Authors
Toni Shiroka
(ETH Zurich and Paul Scherrer Institut, Villigen)
Tian Shang
(Paul Scherrer Institut, Villigen PSI, Switzerland)
Nicolò Barbero
(Laboratorium für Festkörperphysik, ETH Zürich )
G-H. Cao
(Department of Physics, Zhejiang University, China)
I. Eremin
(Institut für Theoretische Physik III, Ruhr-Universität Bochum)
Joel Mesot
(ETH Zürich)
H.-R. Ott
(ETH Zürich)
