Magnetic and ligand field properties of copper at the interfaces of (CaCuO2)(n)/(SrTiO3)(n) superlattices

@article{ ISI:000305533900005,
Author = {Minola, M. and Di Castro, D. and Braicovich, L. and Brookes, N. B. and
   Innocenti, D. and Sala, M. Moretti and Tebano, A. and Balestrino, G. and
   Ghiringhelli, G.},
Title = {{Magnetic and ligand field properties of copper at the interfaces of
   (CaCuO2)(n)/(SrTiO3)(n) superlattices}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2012}},
Volume = {{85}},
Number = {{23}},
Month = {{JUN 20}},
Abstract = {{Using high-resolution resonant inelastic x-ray scattering (RIXS) excited
   at the Cu L-3 edge we have investigated the ligand field (dd) and
   magnetic excitations in (CaCuO2)(n)/(SrTiO3)(n) superlattices (n = 2,3)
   and compared them to those of a 14-nm-thick CaCuO2 film. The dd
   excitation spectrum reveals a pyramidal coordination of Cu ions at the
   CaCuO2/SrTiO3 interfaces. In the three samples, spin excitations are in
   the form of dispersing magnons, with similar spectral intensity but
   reduced dynamics in SLs with respect to pure CaCuO2. By fitting the
   dispersions within linear spin wave theory we have obtained the leading
   term of the in-plane superexchange parameters: J = 127 meV, 138 meV, and
   157 meV for n = 2, 3 SLs, and CaCuO2, respectively. These results
   demonstrate that the antiferromagnetic order is preserved in these SLs
   down to very small cuprate layer thickness and despite the chemical and
   structural alterations at the interface. This finding opens the way to
   the production of artificial Cu-based high-temperature superconductors
   where the charge reservoir layer is constituted by the interface itself.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Minola, M (Corresponding Author), Politecn Milan, CNISM, I-20133 Milan, Italy.
   Minola, M., Politecn Milan, CNISM, I-20133 Milan, Italy.
   Di Castro, D.; Innocenti, D.; Tebano, A.; Balestrino, G., Univ Roma Tor Vergata, CNR SPIN, I-00133 Rome, Italy.
   Minola, M.; Braicovich, L.; Sala, M. Moretti; Ghiringhelli, G., Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy.
   Di Castro, D.; Innocenti, D.; Tebano, A.; Balestrino, G., Univ Roma Tor Vergata, Dipartimento Ingn Civile & Ingn Informat, I-00133 Rome, Italy.
   Braicovich, L.; Sala, M. Moretti; Ghiringhelli, G., Politecn Milan, CNR SPIN, I-20133 Milan, Italy.
   Brookes, N. B., European Synchrotron Radiat Facil, F-38043 Grenoble, France.}},
DOI = {{10.1103/PhysRevB.85.235138}},
Article-Number = {{235138}},
ISSN = {{1098-0121}},
Keywords-Plus = {{TEMPERATURE; SUPERCONDUCTORS; CACUO2; OXIDES}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
ResearcherID-Numbers = {{Brookes, Nicholas B/C-6718-2019
   Ghiringhelli, Giacomo/D-1159-2014
   Sala, Marco Moretti/H-1034-2014
   Moretti, Marco/AAF-9255-2019
   innocenti, davide/H-7786-2012
   }},
ORCID-Numbers = {{Brookes, Nicholas B/0000-0002-1342-9530
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Sala, Marco Moretti/0000-0002-9744-9976
   Moretti, Marco/0000-0002-9744-9976
   innocenti, davide/0000-0002-0465-3039
   TEBANO, ANTONELLO/0000-0002-0229-671X
   Minola, Matteo/0000-0003-4084-0664
   Braicovich, Lucio/0000-0001-6548-9140
   DI CASTRO, DANIELE/0000-0002-0878-6904}},
Funding-Acknowledgement = {{Italian Ministry of Research MIURMinistry of Education, Universities and
   Research (MIUR) {[}PRIN-20094W2LAY]}},
Funding-Text = {{This research project has been partially supported by the Italian
   Ministry of Research MIUR (Grant No. PRIN-20094W2LAY).}},
Number-of-Cited-References = {{28}},
Times-Cited = {{14}},
Usage-Count-Last-180-days = {{1}},
Usage-Count-Since-2013 = {{32}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{962HN}},
Unique-ID = {{ISI:000305533900005}},
DA = {{2020-12-22}},
}