Actions for Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs [electronic resource].

Email RIS file
Bookmark
Report an Issue

Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 13,788 : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
The recent discovery of pressure (p) induced superconductivity in the binary helimagnet CrAs has raised questions on how superconductivity emerges from the magnetic state and on the mechanism of the superconducting pairing. In the present work the suppression of magnetism and the occurrence of superconductivity in CrAs were studied by means of muon spin rotation. The magnetism remains bulk up to p≃3.5 kbar while its volume fraction gradually decreases with increasing pressure until it vanishes at p≃7 kbar. At 3.5 kbar superconductivity abruptly appears with its maximum Tc≃1.2 K which decreases upon increasing the pressure. In the intermediate pressure region (3.5 ≲ p ≲ 7 kbar) the superconducting and the magnetic volume fractions are spatially phase separated and compete for phase volume. Our results indicate that the less conductive magnetic phase provides additional carriers (doping) to the superconducting parts of the CrAs sample thus leading to an increase of the transition temperature (Tc) and of the superfluid density (ρs). A scaling of ρs with as well as the phase separation between magnetism and superconductivity point to a conventional mechanism of the Cooper-pairing in CrAs.
Report Numbers
E 1.99:1286900
Subject(s)
Note
Published through SciTech Connect.
09/08/2015.
Scientific Reports 5 ISSN 2045-2322 AM
Rustem Khasanov; Zurab Guguchia; Ilya Eremin; Hubertus Luetkens; Alex Amato; Pabitra K. Biswas; Christian Ruegg; Michael A. Susner; Athena Safa Sefat; Nikolai D. Zhigadlo; Elvesio Morenzoni.
Funding Information
AC05-00OR22725
View MARC record | catkey: 23758735