Volume 125, Number 5, March 2019
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||08 April 2019|
Resistivity measurements unveil microscopic properties of CrAs
1 Dipartimento di Fisica “E.R. Caianiello”, Università degli Studi di Salerno - I-84084 Fisciano (SA), Italy
2 CNR-SPIN, UOS di Salerno - I-84084 Fisciano (SA), Italy
3 RIKEN Center for Emergent Matter Science - Wakoshi, Saitama 351-0198, Japan
4 International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences - Aleja Lotnikw 32/46, PL-02668 Warsaw, Poland
5 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences Beijing 100190, China
6 Songshan Lake Materials Laboratory, Dongguan - Guangdong 523808, China
7 School of Physical Sciences, University of Chinese Academy of Sciences - Beijing 100190, China
Received: 6 December 2018
Accepted: 7 March 2019
We report resistivity measurements of a CrAs single crystal in a wide temperature range, with the specific aim to assess the applicability of the Bloch-Grüneisen formula for electron-phonon resistivity. We find that the resistance reaches a residual value at and its temperature dependence cannot be fitted only with a suitable Bloch-Grüneisen formula in the whole temperature range, even though we are able to calculate a well-defined transport Debye temperature. The observed temperature-dependent resistivity seems to suggest a non–phonon-mediated superconducting pairing, supporting a magnetic fluctuation mechanism as the likely glue for the superconducting coupling.
PACS: 72.10.Bg – General formulation of transport theory / 72.10.Di – Scattering by phonons, magnons, and other nonlocalized excitations / 74.70.-b – Superconducting materials other than cuprates
© EPLA, 2019
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.