Dielectric Response of Quantum Critical Ferroelectric as a Function of Pressure
- 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.
- 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
Web of Science
Enhanced superconductivity close to a non-magnetic quantum critical point in electron-doped strontium titanate
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journal | February 2019 |
Quantum critical phenomena in a compressible displacive ferroelectric
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journal | May 2020 |
Pressure dependence of ferroelectric quantum critical fluctuations
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journal | December 2019 |
Quantum critical phenomena in a compressible displacive ferroelectric
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text | January 2020 |
Quantum Critical Phenomena in a Compressible Displacive Ferroelectric | text | January 2018 |
Pressure dependence of ferroelectric quantum critical fluctuations | text | January 2019 |
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