Large Polarons as Key Quasiparticles in SrTiO3 and SrTiO3-Based Heterostructures

@article{ ISI:000569266900009,
Author = {Geondzhian, Andrey and Sambri, Alessia and De Luca, Gabriella M. and Di
   Capua, Roberto and Di Gennaro, Emiliano and Betto, Davide and Rossi,
   Matteo and Peng, Ying Ying and Fumagalli, Roberto and Brookes, Nicholas
   B. and Braicovich, Lucio and Gilmore, Keith and Ghiringhelli, Giacomo
   and Salluzzo, Marco},
Title = {{Large Polarons as Key Quasiparticles in SrTiO3 and SrTiO3-Based
   Heterostructures}},
Journal = {{PHYSICAL REVIEW LETTERS}},
Year = {{2020}},
Volume = {{125}},
Number = {{12}},
Month = {{SEP 15}},
Abstract = {{Despite its simple structure and low degree of electronic correlation,
   SrTiO3 (STO) features collective phenomena linked to charge transport
   and, ultimately, superconductivity, that are not yet fully explained.
   Thus, a better insight into the nature of the quasiparticles shaping the
   electronic and conduction properties of STO is needed. We studied the
   low-energy excitations of bulk STO and of the LaAlO3/SrTiO3
   two-dimensional electron gas (2DEG) by Ti L-3 edge resonant inelastic
   x-ray scattering. In all samples, we find the hallmark of polarons in
   the form of intense dd + phonon excitations, and a decrease of the
   LO3-mode electron-phonon coupling when going from insulating to highly
   conducting STO single crystals and heterostructures. Both results are
   attributed to the dynamic screening of the large polaron self-induced
   polarization, showing that the low-temperature physics of STO and
   STO-based 2DEGs is dominated by large polaron quasiparticles.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Salluzzo, M (Corresponding Author), CNR SPIN, Complesso Monte Santangelo Via Cinthia, I-80126 Naples, Italy.
   Geondzhian, Andrey; Betto, Davide; Brookes, Nicholas B.; Braicovich, Lucio; Gilmore, Keith, ESRF European Synchrotron, 71 Ave Martyrs,CS 40220, F-38043 Grenoble, France.
   Sambri, Alessia; De Luca, Gabriella M.; Di Capua, Roberto; Di Gennaro, Emiliano; Salluzzo, Marco, CNR SPIN, Complesso Monte Santangelo Via Cinthia, I-80126 Naples, Italy.
   De Luca, Gabriella M.; Di Capua, Roberto; Di Gennaro, Emiliano, Univ Napoli Federico II, Dipartimento Fis Ettore Pancini, Complesso Monte Santangelo Via Cinthia, I-80126 Naples, Italy.
   Rossi, Matteo; Peng, Ying Ying; Fumagalli, Roberto; Braicovich, Lucio; Ghiringhelli, Giacomo, Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.
   Rossi, Matteo, SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
   Peng, Ying Ying, Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing, Peoples R China.
   Gilmore, Keith, Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Div, Upton, NY 11973 USA.
   Ghiringhelli, Giacomo, CNR SPIN, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.
   Betto, Davide, Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.}},
DOI = {{10.1103/PhysRevLett.125.126401}},
Article-Number = {{126401}},
ISSN = {{0031-9007}},
EISSN = {{1079-7114}},
Keywords-Plus = {{FESE FILMS; SUPERCONDUCTIVITY}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Multidisciplinary}},
Author-Email = {{marco.salluzzo@spin.cnr.it}},
ResearcherID-Numbers = {{Ghiringhelli, Giacomo/D-1159-2014
   peng, yingying/K-1805-2015}},
ORCID-Numbers = {{Gilmore, Keith/0000-0002-9231-3551
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Rossi, Matteo/0000-0002-4254-0713
   peng, yingying/0000-0002-2657-3590}},
Funding-Acknowledgement = {{EUEuropean Union (EU) {[}731473]; MIUR of ItalyMinistry of Education,
   Universities and Research (MIUR) {[}PRIN 20177SL7HC, PRIN 2017Z8TS5B];
   Fondazione CARIPLOFondazione Cariplo; Regione LombardiaRegione Lombardia
   {[}2016-0790]; U.S. Department of Energy, Office of Science, Basic
   Energy SciencesUnited States Department of Energy (DOE)}},
Funding-Text = {{The authors gratefully acknowledge the help of the ID32 beam line staff
   at ESRF. This project received funding from the EU Horizon H2020 project
   QUANTOX (Grant No. 731473); MIUR of Italy for the PRIN projects TOPSPIN
   (Grant No. PRIN 20177SL7HC), and QUANTUM 2D (Grant No. PRIN 2017Z8TS5B);
   from the Fondazione CARIPLO and Regione Lombardia for the ERC-P-ReXS
   project (Grant No. 2016-0790). K. G. was supported by the U.S.
   Department of Energy, Office of Science, Basic Energy Sciences as part
   of the Computational Materials Science Program.}},
Number-of-Cited-References = {{46}},
Times-Cited = {{0}},
Usage-Count-Last-180-days = {{8}},
Usage-Count-Since-2013 = {{8}},
Journal-ISO = {{Phys. Rev. Lett.}},
Doc-Delivery-Number = {{NO1SQ}},
Unique-ID = {{ISI:000569266900009}},
DA = {{2020-12-22}},
}