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

Abstract

In this study we report for the first time measurements of the dielectric loss of single-crystal SrTiO 3 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 SrTiO 3 and the behaviour of its size linked to the position of this point on the recently established phase diagram.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Cambridge Univ., Cambridge (United Kingdom); Institute for Basic Science, Seoul (Republic of Korea); Seoul National Univ., Seoul (Republic of Korea)
  2. Cambridge Univ., Cambridge (United Kingdom)
  3. Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Chicago, Chicago, IL (United States)
  4. Cambridge Univ., Cambridge (United Kingdom); National Univ. of Science and Technology "MISiS", Moscow (Russia)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Ministry of Education and Science of the Russian Federation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1487131
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Coak, M. J., Haines, C. R. S., Liu, C., Jarvis, D. M., Littlewood, P. B., and Saxena, S. S. Dielectric Response of Quantum Critical Ferroelectric as a Function of Pressure. United States: N. p., 2018. Web. doi:10.1038/s41598-018-33320-2.
Coak, M. J., Haines, C. R. S., Liu, C., Jarvis, D. M., Littlewood, P. B., & Saxena, S. S. Dielectric Response of Quantum Critical Ferroelectric as a Function of Pressure. United States. doi:10.1038/s41598-018-33320-2.
Coak, M. J., Haines, C. R. S., Liu, C., Jarvis, D. M., Littlewood, P. B., and Saxena, S. S. Mon . "Dielectric Response of Quantum Critical Ferroelectric as a Function of Pressure". United States. doi:10.1038/s41598-018-33320-2. https://www.osti.gov/servlets/purl/1487131.
@article{osti_1487131,
title = {Dielectric Response of Quantum Critical Ferroelectric as a Function of Pressure},
author = {Coak, M. J. and Haines, C. R. S. and Liu, C. and Jarvis, D. M. and Littlewood, P. B. and Saxena, S. S.},
abstractNote = {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.},
doi = {10.1038/s41598-018-33320-2},
journal = {Scientific Reports},
issn = {2045-2322},
number = 1,
volume = 8,
place = {United States},
year = {2018},
month = {10}
}

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Cited by: 1 work
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Figures / Tables:

Figure 1 Figure 1: Dielectric loss of SrTiO3 plotted against temperature from zero applied pressure (topmost, blue) to 15.7 kbar (bottom, red), and with data taken at zero applied pressure after removing all the load in the cell shown in dashed black. The peak at 10 K has been drastically suppressed bymore » even the lowest pressure applied and the act of pressurising the cell has permanently removed the feature at 16 K. Inset shows detail of the two pressure sweeps where a broad maximum around 30 K is most clearly seen.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.