by Bisogni, Valentina, Kourtis, Stefanos, Monney, Claude, Zhou, Kejin, Kraus, Roberto, Sekar, Chinnathambi, Strocov, Vladimir, Buechner, Bernd, van den Brink, Jeroen, Braicovich, Lucio and Schmitt, Thorsten, Daghofer, Maria and Geck, Jochen
Abstract:
Taking spinon excitations in the quantum antiferromagnet CaCu2O3 as an example, we demonstrate that femtosecond dynamics of magnetic electronic excitations can be probed by direct resonant inelastic x-ray scattering (RIXS). To this end, we isolate the contributions of single and double spin-flip excitations in experimental RIXS spectra, identify the physical mechanisms that cause them, and determine their respective time scales. By comparing theory and experiment, we find that double spin flips need a finite amount of time to be generated, rendering them sensitive to the core-hole lifetime, whereas single spin flips are, to a very good approximation, independent of it. This shows that RIXS can grant access to time-domain dynamics of excitations and illustrates how RIXS experiments can distinguish between excitations in correlated electron systems based on their different time dependence.
Reference:
Femtosecond Dynamics of Momentum-Dependent Magnetic Excitations from Resonant Inelastic X-Ray Scattering in CaCu2O3 (Bisogni, Valentina, Kourtis, Stefanos, Monney, Claude, Zhou, Kejin, Kraus, Roberto, Sekar, Chinnathambi, Strocov, Vladimir, Buechner, Bernd, van den Brink, Jeroen, Braicovich, Lucio and Schmitt, Thorsten, Daghofer, Maria and Geck, Jochen), In PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, volume 112, 2014.
Bibtex Entry:
@article{ ISI:000339490700016, Author = {Bisogni, Valentina and Kourtis, Stefanos and Monney, Claude and Zhou, Kejin and Kraus, Roberto and Sekar, Chinnathambi and Strocov, Vladimir and Buechner, Bernd and van den Brink, Jeroen and Braicovich, Lucio and Schmitt, Thorsten and Daghofer, Maria and Geck, Jochen}, Title = {{Femtosecond Dynamics of Momentum-Dependent Magnetic Excitations from Resonant Inelastic X-Ray Scattering in CaCu2O3}}, Journal = {{PHYSICAL REVIEW LETTERS}}, Year = {{2014}}, Volume = {{112}}, Number = {{14}}, Month = {{APR 7}}, Abstract = {{Taking spinon excitations in the quantum antiferromagnet CaCu2O3 as an example, we demonstrate that femtosecond dynamics of magnetic electronic excitations can be probed by direct resonant inelastic x-ray scattering (RIXS). To this end, we isolate the contributions of single and double spin-flip excitations in experimental RIXS spectra, identify the physical mechanisms that cause them, and determine their respective time scales. By comparing theory and experiment, we find that double spin flips need a finite amount of time to be generated, rendering them sensitive to the core-hole lifetime, whereas single spin flips are, to a very good approximation, independent of it. This shows that RIXS can grant access to time-domain dynamics of excitations and illustrates how RIXS experiments can distinguish between excitations in correlated electron systems based on their different time dependence.}}, Publisher = {{AMER PHYSICAL SOC}}, Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}}, Type = {{Article}}, Language = {{English}}, Affiliation = {{Bisogni, V (Corresponding Author), Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA. Bisogni, Valentina; Kourtis, Stefanos; Kraus, Roberto; Sekar, Chinnathambi; Buechner, Bernd; van den Brink, Jeroen; Daghofer, Maria; Geck, Jochen, Leibniz Inst Solid State & Mat Res IFW Dresden, D-01069 Dresden, Germany. Bisogni, Valentina; Monney, Claude; Zhou, Kejin; Strocov, Vladimir; Schmitt, Thorsten, Paul Scherrer Inst, Res Dept Synchrotron Radiat & Nanotechnol, CH-5232 Villigen, Switzerland. Monney, Claude, Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany. Buechner, Bernd; van den Brink, Jeroen, Tech Univ Dresden, Dept Phys, D-1062 Dresden, Germany. Braicovich, Lucio, CNR, SPIN, CNISM, I-20133 Milan, Italy. Braicovich, Lucio, Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy.}}, DOI = {{10.1103/PhysRevLett.112.147401}}, Article-Number = {{147401}}, ISSN = {{0031-9007}}, EISSN = {{1079-7114}}, Keywords-Plus = {{LEVEL PHOTOEMISSION SPECTRA; CHARGE-TRANSFER; CU; PHOTOELECTRON; 2P; SPECTROSCOPY; LA2CUO4; AUGER}}, Research-Areas = {{Physics}}, Web-of-Science-Categories = {{Physics, Multidisciplinary}}, Author-Email = {{bisogni@bnl.gov}}, ResearcherID-Numbers = {{Monney, Claude/C-5553-2011 Buchner, Bernd/E-2437-2016 van den Brink, Jeroen/E-5670-2011 Daghofer, Maria/C-5762-2008 Kourtis, Stefanos/AAA-5963-2019 van den Brink, Jeroen/Y-3931-2019 Schmitt, Thorsten/A-7025-2010 Daghofer, Maria/P-4245-2019 }}, ORCID-Numbers = {{Monney, Claude/0000-0003-3496-1435 Buchner, Bernd/0000-0002-3886-2680 van den Brink, Jeroen/0000-0001-6594-9610 Daghofer, Maria/0000-0001-9434-8937 Kourtis, Stefanos/0000-0002-9187-8067 Daghofer, Maria/0000-0001-9434-8937 Braicovich, Lucio/0000-0001-6548-9140}}, Funding-Acknowledgement = {{Swiss National Science Foundation and its National Centre of Competence in Research MaNEP; European CommunityEuropean Community (EC) {[}290605]; Emmy-Noether ProgramGerman Research Foundation (DFG) {[}GE1647/2-1, DA 1235/1-1]; Deutscher Akademischer Austauschdienst (DAAD)Deutscher Akademischer Austausch Dienst (DAAD)}}, Funding-Text = {{We acknowledge fruitful discussions with K. Wohlfeld and S. Johnston. This work was performed at the ADRESS beam line of the Swiss Light Source using the SAXES instrument jointly built by Paul Scherrer Institut, Switzerland and Politecnico di Milano, Italy. This project was supported by the Swiss National Science Foundation and its National Centre of Competence in Research MaNEP. The research leading to these results has received funding from the European Community's Seventh Framework Programme (No. FP7/2007-2013) under Grant No. 290605 (PSIFELLOW/COFUND). We gratefully acknowledge financial support through the Emmy-Noether Program (V. B., R. K., and J. G. under Grant No. GE1647/2-1, M. D. and S. K. under Grant No. DA 1235/1-1). V. B. also acknowledges the financial support of Deutscher Akademischer Austauschdienst (DAAD).}}, Number-of-Cited-References = {{48}}, Times-Cited = {{13}}, Usage-Count-Last-180-days = {{2}}, Usage-Count-Since-2013 = {{44}}, Journal-ISO = {{Phys. Rev. Lett.}}, Doc-Delivery-Number = {{AL9VL}}, Unique-ID = {{ISI:000339490700016}}, OA = {{Green Published}}, DA = {{2020-12-22}}, }
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