Dielectric Response of Quantum Critical Ferroelectric as a Function of Pressure

Coak, M. J.; Haines, C. R. S.; Liu, C.; Jarvis, D. M.; Littlewood, P. B.; Saxena, S. S.

doi:10.1038/s41598-018-33320-2

Title: Dielectric Response of Quantum Critical Ferroelectric as a Function of Pressure

Journal Article · Mon Oct 08 00:00:00 EDT 2018 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-018-33320-2· OSTI ID:1487131

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^[2]; Liu, C. ^[2]; Jarvis, D. M. ^[2];

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Cambridge Univ., Cambridge (United Kingdom); Institute for Basic Science, Seoul (Republic of Korea); Seoul National Univ., Seoul (Republic of Korea)
Cambridge Univ., Cambridge (United Kingdom)
Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Chicago, Chicago, IL (United States)
Cambridge Univ., Cambridge (United Kingdom); National Univ. of Science and Technology "MISiS", Moscow (Russia)

In this study we report for the first time measurements of the dielectric loss of single-crystal SrTiO₃ under the application of hydrostatic pressure up to 20 kbar and temperatures down to 200 mK which allow us to comment on the evolution of new fundamental material properties and their relationship with the recently discovered quantum critical phenomena in this material. The well known 18 K peak or shoulder was no longer observed after pressure was applied, even after subsequently removing it, suggesting it is associated with the twin walls formed at the 110 K cubic-tetragonal transition. The family of familiar peaks were all seen to increase in temperature linearly with pressure, and the height of the 9.4 K peak was drastically suppressed by even the smallest pressures. This peak is discussed in the context of a postulated ferroelectric quantum critical point in SrTiO₃ and the behaviour of its size linked to the position of this point on the recently established phase diagram.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: Ministry of Education and Science of the Russian Federation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1487131

Journal Information:: Scientific Reports, Vol. 8, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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