A determination of the pairing interaction in the high T-c cuprate superconductor Tl2BaCaCu2O8 (Tl2212)

@article{ ISI:000249870500011,
Author = {Little, W. A. and Holcomb, M. J. and Ghiringhelli, G. and Braicovich, L.
   and Dallera, C. and Piazzalunga, A. and Tagliaferri, A. and Brookes, N.
   B.},
Title = {{A determination of the pairing interaction in the high T-c cuprate
   superconductor Tl2BaCaCu2O8 (Tl2212)}},
Journal = {{PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS}},
Year = {{2007}},
Volume = {{460}},
Number = {{1}},
Pages = {{40-43}},
Month = {{SEP 1}},
Note = {{8th International Conference on Materials and Mechanisms of
   Superconductivity and High Temperature Superconductors, Dresden,
   GERMANY, JUL 09-14, 2006}},
Abstract = {{We have measured the near-normal reflectance of T12212 for energies from
   0. 1 to 4.0 eV at room temperature and used a Kramers-Kronig analysis to
   find the complex, frequency dependent dielectric function,
   epsilon(omega) from which the optical conductivity a(omega) was
   determined. Using thermal-difference-reflectance (TDR) spectroscopy the
   reflectance of the sample in the normal state just above the
   superconducting transition, and in the superconducting state were then
   obtained. From these data we determined the ratio of the
   superconducting- to normal-state optical conductivities,
   sigma(S1)(omega)/sigma(N1)(omega)- Mattis and Bardeen had calculated
   this function within the BCS theory, where the gap is a fixed
   energy-independent quantity. Taking into account the retarded nature of
   the electron-phonon coupling results in a complex, energy dependent gap
   Delta(omega) causing deviations from the Mattis-Bardeen plot at energies
   where the phonon coupling function alpha(2)(omega)F(omega), is large. We
   find a typical deviation near the phonon energies in T12212, and in
   addition, at 1.2 and 1.7 eV. The phonon, and these electronic terms can
   each be described by a coupling constant;lambda. None of which by itself
   gives rise to a high transition temperature, but the combination does.
   Using resonant inelastic X-ray scattering (RIXS) we find that the d-d
   excitations of the cuprate ion in T12212 fall at the same energies as
   the dips in the Mattis-Bardeen plot. We conclude that the high
   superconducting transition temperature of the cuprates is due to the sum
   of the phonon interaction, and interactions with the Cu-ion d-shell. (c)
   2007 Elsevier B.V. All rights reserved.}},
Publisher = {{ELSEVIER SCIENCE BV}},
Address = {{PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}},
Type = {{Article; Proceedings Paper}},
Language = {{English}},
Affiliation = {{Little, WA (Corresponding Author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   Politecn Milan, Milan, Italy.
   European Synchrotron Radiat Facil, F-38043 Grenoble, France.}},
DOI = {{10.1016/j.physc.2007.03.031}},
ISSN = {{0921-4534}},
EISSN = {{1873-2143}},
Keywords = {{RIXS; superconductivity; cuprates; optical conductivity; electron-phonon
   interaction; exciton interaction; TDR spectroscopy}},
Keywords-Plus = {{RAY-EMISSION-SPECTROSCOPY; TEMPERATURE SUPERCONDUCTORS}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Applied; Physics, Condensed Matter}},
Author-Email = {{bill@mmr.com}},
ResearcherID-Numbers = {{Brookes, Nicholas B/C-6718-2019
   Ghiringhelli, Giacomo/D-1159-2014
   Tagliaferri, Alberto/L-2903-2015
   }},
ORCID-Numbers = {{Brookes, Nicholas B/0000-0002-1342-9530
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Tagliaferri, Alberto/0000-0001-8001-1786
   Braicovich, Lucio/0000-0001-6548-9140}},
Number-of-Cited-References = {{30}},
Times-Cited = {{10}},
Usage-Count-Last-180-days = {{0}},
Usage-Count-Since-2013 = {{12}},
Journal-ISO = {{Physica C}},
Doc-Delivery-Number = {{216IA}},
Unique-ID = {{ISI:000249870500011}},
DA = {{2020-12-22}},
}