by Di Castro, D., Aruta, C., Tebano, A., Innocenti, D., Minola, M., Sala, M. Moretti, Prellier, W., Lebedev, O. and Balestrino, G.
Abstract:
Here we report a structural and electronic investigation of the recently discovered CaCuO2 = SrTiO3 superconducting artificial superlattices based on two insulating oxides. We show that T-c= 50 K is reached in the superlattices grown on NdGaO3 substrate under optimized growth conditions. If the superlattices are grown on LaAlO3 substrate the Tc is drastically reduced due to the much higher lattice mismatch between CaCuO2 and LaAlO3, which has lattice parameters substantially smaller than NdGaO3. The consequent in-plane lattice contraction also makes the incorporation of extra oxygen atoms more difficult, leading to a decrease of hole doping and Tc. Finally, x-ray absorption spectroscopy study as a function of the thickness of the CaCuO2 block in CaCuO2 = SrTiO3 superconducting superlattices has revealed the important role played by the interfaces as the location of hole doping and superconductivity in these systems.
Reference:
T-c up to 50 K in superlattices of insulating oxides (Di Castro, D., Aruta, C., Tebano, A., Innocenti, D., Minola, M., Sala, M. Moretti, Prellier, W., Lebedev, O. and Balestrino, G.), In SUPERCONDUCTOR SCIENCE & TECHNOLOGY, IOP PUBLISHING LTD, volume 27, 2014.
Bibtex Entry:
@article{ ISI:000334435900019, Author = {Di Castro, D. and Aruta, C. and Tebano, A. and Innocenti, D. and Minola, M. and Sala, M. Moretti and Prellier, W. and Lebedev, O. and Balestrino, G.}, Title = {{T-c up to 50 K in superlattices of insulating oxides}}, Journal = {{SUPERCONDUCTOR SCIENCE & TECHNOLOGY}}, Year = {{2014}}, Volume = {{27}}, Number = {{4}}, Month = {{APR}}, Note = {{11th European Conference on Applied Superconductivity (EUCAS), Genoa, ITALY, SEP 15-19, 2013}}, Abstract = {{Here we report a structural and electronic investigation of the recently discovered CaCuO2 = SrTiO3 superconducting artificial superlattices based on two insulating oxides. We show that T-c= 50 K is reached in the superlattices grown on NdGaO3 substrate under optimized growth conditions. If the superlattices are grown on LaAlO3 substrate the Tc is drastically reduced due to the much higher lattice mismatch between CaCuO2 and LaAlO3, which has lattice parameters substantially smaller than NdGaO3. The consequent in-plane lattice contraction also makes the incorporation of extra oxygen atoms more difficult, leading to a decrease of hole doping and Tc. Finally, x-ray absorption spectroscopy study as a function of the thickness of the CaCuO2 block in CaCuO2 = SrTiO3 superconducting superlattices has revealed the important role played by the interfaces as the location of hole doping and superconductivity in these systems.}}, Publisher = {{IOP PUBLISHING LTD}}, Address = {{TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND}}, Type = {{Article; Proceedings Paper}}, Language = {{English}}, Affiliation = {{Di Castro, D (Corresponding Author), Univ Roma Tor Vergata, CNR SPIN, Via Politecn 1, I-00133 Rome, Italy. Di Castro, D.; Aruta, C.; Tebano, A.; Innocenti, D.; Balestrino, G., Univ Roma Tor Vergata, CNR SPIN, I-00133 Rome, Italy. Di Castro, D.; Aruta, C.; Tebano, A.; Innocenti, D.; Balestrino, G., Univ Roma Tor Vergata, Dipartimento Ingn Civile & Ingn Informat, I-00133 Rome, Italy. Minola, M.; Sala, M. Moretti, Politecn Milan, CNISM, I-20133 Milan, Italy. Minola, M.; Sala, M. Moretti, Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy. Sala, M. Moretti, CNRS ENSICAEN, Lab CRISMAT, UMR 6508, F-14050 Caen, France.}}, DOI = {{10.1088/0953-2048/27/4/044016}}, Article-Number = {{044016}}, ISSN = {{0953-2048}}, EISSN = {{1361-6668}}, Keywords = {{oxide heterostructures; superconductivity; pulsed laser deposition}}, Keywords-Plus = {{X-RAY-ABSORPTION; SUPERCONDUCTIVITY; TEMPERATURE; INTERFACE; STRAIN}}, Research-Areas = {{Physics}}, Web-of-Science-Categories = {{Physics, Applied; Physics, Condensed Matter}}, Author-Email = {{daniele.di.castro@uniroma2.it}}, ResearcherID-Numbers = {{Aruta, Carmela/L-2957-2015 Sala, Marco Moretti/H-1034-2014 Lebedev, Oleg I/B-4443-2014 Moretti, Marco/AAF-9255-2019 Prellier, W/AAB-3819-2019 innocenti, davide/H-7786-2012 }}, ORCID-Numbers = {{Aruta, Carmela/0000-0002-6917-6667 Sala, Marco Moretti/0000-0002-9744-9976 Moretti, Marco/0000-0002-9744-9976 Prellier, W/0000-0002-1492-2837 innocenti, davide/0000-0002-0465-3039 Minola, Matteo/0000-0003-4084-0664 DI CASTRO, DANIELE/0000-0002-0878-6904 TEBANO, ANTONELLO/0000-0002-0229-671X}}, Number-of-Cited-References = {{21}}, Times-Cited = {{8}}, Usage-Count-Last-180-days = {{0}}, Usage-Count-Since-2013 = {{46}}, Journal-ISO = {{Supercond. Sci. Technol.}}, Doc-Delivery-Number = {{AF0WT}}, Unique-ID = {{ISI:000334435900019}}, DA = {{2020-12-22}}, }
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