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Observation Of Two Critical Points Linked To The High-field Phase B In Cecu2si2

Title: Observation Of Two Critical Points Linked To The High-field Phase B In Cecu2si2.
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Name(s): Weickert, Franziska, author
Gegenwart, Philipp, author
Geibel, Christoph, author
Assmus, Wolf, author
Steglich, Frank, author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-08-08
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We present thermal expansion and magnetostriction measurements on a CeCu2Si2 single crystal of A/S type up to 17.9 T magnetic field applied along the crystallographic a direction (Delta L parallel to a parallel to H) and down to 0.015 K temperature. We identify clear thermodynamic anomalies at the superconducting transition T-c and at two second-order transitions T-A,T-B into ordered phases A and B. Our measurements establish the boundary of phase B at high field and low temperature. No evidence for additional high-field phases above B is found up to the maximum field. We speculate based on our experimental results that (i) phase B is similar to phase A of spin-density wave type and (ii) the first-order phase transition between A and B is caused by Fermi-surface reconstruction. We furthermore identify a quantum critical point at H-c similar or equal to 17 T, where T-B is suppresssed to zero, and a bicritical point at (0.35 K, 7.0 T), where phase lines T-A(H) and T-B(H) meet.
Identifier: FSU_libsubv1_wos_000441108600002 (IID), 10.1103/PhysRevB.98.085115 (DOI)
Keywords: pressure, fermion superconductor cecu2si2, magnetic order
Publication Note: The publisher’s version of record is available at https://doi.org/10.1103/PhysRevB.98.085115
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000441108600002
Owner Institution: FSU
Is Part Of: Physical Review B.
2469-9950
Issue: iss. 8, vol. 98

Choose the citation style.
Weickert, F., Gegenwart, P., Geibel, C., Assmus, W., & Steglich, F. (2018). Observation Of Two Critical Points Linked To The High-field Phase B In Cecu2si2. Physical Review B. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000441108600002