Speaker
Ola Kenji Forslund
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Description
None zero Berry curvature in condensed matter is the fundamental concept behind the unique responses topological materials exhibit. We report intrinsic spin fluctuations to be enough to realise anomalous hall effect (AHE) in PrGeAl. PrGeAl is a topological ferromagnet and is stabilised in a none centosymmetric structure. Based on muon spin relaxation, transport, angle resolved photo emission spectroscopy (ARPES) measurements and density functional theory calculations, we show AHE in the paramagnetic phase. Our study show that long-range magnetic order and spontaneous time-reversal symmetry breaking are not essential requirements for AHE and can emerge in a wider range of condensed matter systems than previously thought.
Authors
Dr
Ekaterina Pomjakushina
(Laboratory for Multiscale Materials Experiments (LMX), Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland)
Prof.
Johan Chang
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Dr
Jonathan White
(Laboratory for Neutron Scattering and Imaging (LNS), Paul Scherrer Institute (PSI), CH-5232 Villigen, Switzerland)
Dr
Kevin Kramer
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Dr
Masafumi Horio
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Ola Kenji Forslund
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Dr
Pascal Puphal
(3 Laboratory for Multiscale Materials Experiments (LMX), Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland)
Dr
Qisi Wang
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Prof.
Titus Neupert
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Dr
Xiaoxiong Liu
(Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland)
Prof.
Yasmine Sassa
(Department of Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden)
