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Ambient pressure structural quantum critical point in the phase diagram of (CaxSr1-x)3Rh4Sn13

Goh, S.K., Tompsett, D.A., Saines, P.J., Chang, H.C., Matsumoto, T., Imai, M., Yoshimura, K., Grosche, F.M. (2015) Ambient pressure structural quantum critical point in the phase diagram of (CaxSr1-x)3Rh4Sn13. Physical Review Letters: Moving Physics Forward, 114 (9). ISSN 0031-9007. (doi:10.1103/PhysRevLett.114.097002) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1103/PhysRevLett.114.097002

Abstract

The quasiskutterudite superconductor Sr3Rh4Sn13 features a pronounced anomaly in electrical resistivity at T??138K. We show that the anomaly is caused by a second-order structural transition, which can be tuned to 0 K by applying physical pressure and chemical pressure via the substitution of Ca for Sr. A broad superconducting dome is centered around the structural quantum critical point. Detailed analysis of the tuning parameter dependence of T? as well as insights from lattice dynamics calculations strongly support the existence of a structural quantum critical point at ambient pressure when the fraction of Ca is 0.9 (i.e., xc=0.9). This establishes the (CaxSr1-x)3Rh4Sn13 series as an important system for exploring the physics of structural quantum criticality without the need of applying high pressures.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevLett.114.097002
Uncontrolled keywords: Calcium, Ambient pressures, Chemical pressures, Dynamics calculations, Quantum critical points, Quantum criticality, Second orders, Structural transitions, Tuning parameter, Crystal lattices
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Paul Saines
Date Deposited: 06 Oct 2015 15:15 UTC
Last Modified: 29 May 2019 16:04 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50713 (The current URI for this page, for reference purposes)
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