Temperature dependence of iron local magnetic moment in phase-separated superconducting chalcogenide

@article{ ISI:000346613500004,
Author = {Simonelli, L. and Mizokawa, T. and Sala, M. Moretti and Takeya, H. and
   Mizuguchi, Y. and Takano, Y. and Garbarino, G. and Monaco, G. and Saini,
   N. L.},
Title = {{Temperature dependence of iron local magnetic moment in phase-separated
   superconducting chalcogenide}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2014}},
Volume = {{90}},
Number = {{21}},
Month = {{DEC 17}},
Abstract = {{We have studied local magnetic moment and electronic phase separation in
   superconducting KxFe2-ySe2 by x-ray emission and absorption
   spectroscopy. Detailed temperature-dependent measurements at the Fe
   K-edge have revealed coexisting electronic phases and their correlation
   with the transport properties. By cooling down, the local magnetic
   moment of Fe shows a sharp drop across the superconducting transition
   temperature (T-c) and the coexisting phases exchange spectral weights
   with the low-spin state, gaining intensity at the expense of the
   higher-spin state. After annealing the sample across the iron-vacancy
   order temperature, the system does not recover the initial state and the
   spectral weight anomaly at T-c as well as superconductivity disappear.
   The results clearly underline that the coexistence of the low-spin and
   high-spin phases and the transitions between them provide unusual
   magnetic fluctuations and have a fundamental role in the superconducting
   mechanism of the electronically inhomogeneous KxFe2-ySe2 system.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Simonelli, L (Corresponding Author), European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France.
   Simonelli, L.; Sala, M. Moretti; Garbarino, G.; Monaco, G., European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   Simonelli, L., CELLS, ALBA Synchrotron Radiat Facil, Barcelona 08290, Spain.
   Mizokawa, T.; Mizuguchi, Y.; Saini, N. L., Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   Mizokawa, T., Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2778561, Japan.
   Mizokawa, T., Univ Tokyo, Dept Phys, Kashiwa, Chiba 2778561, Japan.
   Takeya, H.; Mizuguchi, Y.; Takano, Y., Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan.
   Mizuguchi, Y., Tokyo Metropolitan Univ, Dept Elect & Elect Engn, Hachioji, Tokyo 1920397, Japan.
   Monaco, G., Univ Trento, Dipartimento Fis, I-38123 Trento, Italy.}},
DOI = {{10.1103/PhysRevB.90.214516}},
Article-Number = {{214516}},
ISSN = {{2469-9950}},
EISSN = {{2469-9969}},
Keywords-Plus = {{SPECTROSCOPY}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
ResearcherID-Numbers = {{Simonelli, Laura/I-1963-2015
   Monaco, Giulio/AAW-4387-2020
   Garbarino, Gaston L/D-1807-2013
   Sala, Marco Moretti/H-1034-2014
   Mizuguchi, Yoshikazu/Q-9979-2017
   Moretti, Marco/AAF-9255-2019
   Mizokawa, Takashi/E-3302-2015
   Takano, Yoshihiko/H-2788-2011}},
ORCID-Numbers = {{Monaco, Giulio/0000-0003-2497-6422
   Sala, Marco Moretti/0000-0002-9744-9976
   Mizuguchi, Yoshikazu/0000-0002-4771-7805
   Moretti, Marco/0000-0002-9744-9976
   Mizokawa, Takashi/0000-0002-7682-2348
   Takano, Yoshihiko/0000-0002-1541-6928}},
Funding-Acknowledgement = {{MIUR, ItalyMinistry of Education, Universities and Research (MIUR)
   {[}2012X3YFZ2]}},
Funding-Text = {{We thank A. Sulpice for the magnetic susceptibility measurements on the
   annealed sample at the end of the thermal cycles. One of us (T.M.) would
   like to acknowledge hospitality at the Sapienza University of Rome. This
   work is partially supported by PRIN2012 (Grant No. 2012X3YFZ2) of MIUR,
   Italy.}},
Number-of-Cited-References = {{38}},
Times-Cited = {{10}},
Usage-Count-Last-180-days = {{1}},
Usage-Count-Since-2013 = {{52}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{AW9ZL}},
Unique-ID = {{ISI:000346613500004}},
OA = {{Green Published}},
DA = {{2020-12-22}},
}