Extremely high conductivity observed in the triple point topological metal MoP

Nitesh Kumar, Yan Sun, Michael Nicklas, Sarah J. Watzman, Olga Young, Inge Leermakers, Jacob Hornung, Johannes Klotz, Johannes Gooth, Kaustuv Manna, Vicky Süß, Satya N. Guin, Tobias Förster, Marcus Schmidt, Lukas Muechler, Binghai Yan, Peter Werner, Walter Schnelle, Uli Zeitler, Jochen Wosnitza, Stuart S. P. Parkin, Claudia Felser and Chandra Shekhar ()
Additional contact information
Nitesh Kumar: Max Planck Institute for Chemical Physics of Solids
Yan Sun: Max Planck Institute for Chemical Physics of Solids
Michael Nicklas: Max Planck Institute for Chemical Physics of Solids
Sarah J. Watzman: Max Planck Institute for Chemical Physics of Solids
Olga Young: Radboud University
Inge Leermakers: Radboud University
Jacob Hornung: Helmholtz-Zentrum Dresden-Rossendorf
Johannes Klotz: Helmholtz-Zentrum Dresden-Rossendorf
Johannes Gooth: Max Planck Institute for Chemical Physics of Solids
Kaustuv Manna: Max Planck Institute for Chemical Physics of Solids
Vicky Süß: Max Planck Institute for Chemical Physics of Solids
Satya N. Guin: Max Planck Institute for Chemical Physics of Solids
Tobias Förster: Helmholtz-Zentrum Dresden-Rossendorf
Marcus Schmidt: Max Planck Institute for Chemical Physics of Solids
Lukas Muechler: Max Planck Institute for Chemical Physics of Solids
Binghai Yan: Weizmann Institute of Science
Peter Werner: Max Planck Institute of Microstructure Physics
Walter Schnelle: Max Planck Institute for Chemical Physics of Solids
Uli Zeitler: Radboud University
Jochen Wosnitza: Helmholtz-Zentrum Dresden-Rossendorf
Stuart S. P. Parkin: Max Planck Institute of Microstructure Physics
Claudia Felser: Max Planck Institute for Chemical Physics of Solids
Chandra Shekhar: Max Planck Institute for Chemical Physics of Solids

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Weyl and Dirac fermions have created much attention in condensed matter physics and materials science. Recently, several additional distinct types of fermions have been predicted. Here, we report ultra-high electrical conductivity in MoP at low temperature, which has recently been established as a triple point fermion material. We show that the electrical resistivity is 6 nΩ cm at 2 K with a large mean free path of 11 microns. de Haas-van Alphen oscillations reveal spin splitting of the Fermi surfaces. In contrast to noble metals with similar conductivity and number of carriers, the magnetoresistance in MoP does not saturate up to 9 T at 2 K. Interestingly, the momentum relaxing time of the electrons is found to be more than 15 times larger than the quantum coherence time. This difference between the scattering scales shows that momentum conserving scattering dominates in MoP at low temperatures.

Date: 2019
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DOI: 10.1038/s41467-019-10126-y

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