Pregled bibliografske jedinice broj: 1172182
Enhanced superconductivity and ferroelectric quantum criticality in plastically deformed strontium titanate
Enhanced superconductivity and ferroelectric quantum criticality in plastically deformed strontium titanate // Nature Materials, 21 (2021), 1; 54-61 doi:10.1038/s41563-021-01102-3 (međunarodna recenzija, članak, znanstveni)
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Naslov
Enhanced superconductivity and ferroelectric
quantum criticality in plastically deformed
strontium titanate
Autori
Hameed, S. ; Pelc, D. ; Anderson, Z. W. ; Klein, A. ; Spieker, R. J. ; Yue, L. ; Das, B. ; Ramberger, J. ; Lukas, M. ; Liu, Y. ; Krogstad, M. J. ; Osborn, R. ; Li, Y. ; Leighton, C. ; Fernandes, R. M. ; Greven, M.
Izvornik
Nature Materials (1476-1122) 21
(2021), 1;
54-61
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Quantum materials, superconductivity, plastic deformation, ferroelectric, quantum criticality
Sažetak
The properties of quantum materials are commonly tuned using experimental variables such as pressure, magnetic field and doping. Here we explore a different approach using irreversible, plastic deformation of single crystals. We show that compressive plastic deformation induces low- dimensional superconductivity well above the superconducting transition temperature (Tc) of undeformed SrTiO3, with evidence of possible superconducting correlations at temperatures two orders of magnitude above the bulk Tc. The enhanced superconductivity is correlated with the appearance of self-organized dislocation structures, as revealed by diffuse neutron and X- ray scattering. We also observe deformation- induced signatures of quantum-critical ferroelectric fluctuations and inhomogeneous ferroelectric order using Raman scattering. Our results suggest that strain surrounding the self- organized dislocation structures induces local ferroelectricity and quantum-critical dynamics that strongly influence Tc, consistent with a theory of superconductivity enhanced by soft polar fluctuations. Our results demonstrate the potential of plastic deformation and dislocation engineering for the manipulation of electronic properties of quantum materials.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
HRZZ-UIP-2020-02-9494 - Kolektivna pobuđenja i lokalna struktura u nekonvencionalnim supravodičima (CELUS) (Pelc, Damjan, HRZZ - 2020-02) ( CroRIS)
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb,
Fakultet strojarstva i brodogradnje, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- MEDLINE