PhysRevB.87.165130.pdf (1.52 MB)
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Possible high-pressure orbital quantum criticality and an emergent resistive phase in PbRuO3

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journal contribution
posted on 24.04.2015, 13:40 authored by Anna KusmartsevaAnna Kusmartseva, Alexandra Sinclair, Jennifer A. Rodgers, Simon A.J. Kimber, J. Paul Attfield
The orbital ordering transition in the metallic perovskite PbRuO3 is suppressed from 90 K at ambient pressure towards zero temperature at 50 kbar, where non-Fermi liquid resistivity with a temperature exponent n = 1.6 is observed. This evidences a possible quantum critical point brought about by orbital fluctuations, rather than spin fluctuations as observed in Sr3Ru2O7 and heavy fermion conductors. An anomalous increase of resistivity is observed at pressures above ∼100 kbar, and a transition to a more resistive, possibly semiconducting, phase is observed at 300 kbar and ambient temperature. © 2013 American Physical Society.

Funding

We thank Michael Hanfland for assistance with ESRF data collection; EPSRC, the Leverhulme Trust, and the Royal Society for financial support; and STFC for access to ESRF.

History

School

  • Science

Department

  • Physics

Published in

Physical Review B - Condensed Matter and Materials Physics

Volume

87

Issue

16

Citation

KUSMARTSEVA, A.F. ... et al, 2013. Possible high-pressure orbital quantum criticality and an emergent resistive phase in PbRuO3. Physical Review B - Condensed Matter and Materials Physics, 87 (16), 165130.

Publisher

© American Physical Society

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2013

Notes

This article was published in the journal, Physical Review B [© American Physical Society]. It is also available at: http://dx.doi.org/10.1103/PhysRevB.87.165130

ISSN

1098-0121

eISSN

1550-235X

Language

en

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