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kuprati_small.jpg11. 3. 2015
Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates

The paper Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates appeared recently in Nature Physics, published by prof. dr. J. Bonča (Faculty of Mathematics and Physics and Institute "Jožef Stefan"), postdocs dr. L. Vidmar and dr. D. Golež, and an Italian experimental group. One of the pivotal questions in the physics of high-temperature superconductors is whether the low-energy dynamics of the charge carriers is mediated by bosons with a characteristic timescale. This issue has remained elusive as electronic correlations are expected to greatly accelerate the electron–boson scattering processes, confining them to the very femtosecond timescale that is hard to access even with state-of-the-art ultrafast techniques. Here we simultaneously push the time resolution and frequency range of transient reflectivity measurements up to an unprecedented level, enabling us to directly observe the ~16 fs build-up of the effective electron–boson interaction in hole-doped copper oxides. This extremely fast timescale is in agreement with numerical calculations based on the t–J model and the repulsive Hubbard model, in which the relaxation of the photo-excited charges is achieved via inelastic scattering with short-range antiferromagnetic excitations.

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This week
Algebra seminar Mitja Mastnak: Kvantne grupe in kvantne Liejeve algebre, 3. del Sreda, 22. aprila 2015, ob 10. uri v Plemljevem seminarju, Jadranska 19/III, Ljubljana
Discrete mathematics seminar Stephen E. Wilson: The Ring of Fire: solved by rocks and fishes Torek, 21. 4. 2015, od 10h do 12h, Plemljev seminar, Jadranska 19
Complex analysis seminar Rok Gregorič: Izrek Grothendieck-Riemann-Roch za Riemannove ploskve Torek, 21.04.2015 ob 12:30, soba 3.06 na Jadranski 21
Geometric topology seminar Dejan Govc: Eulerjev račun, 2. Sreda, 22. 4. 2015, ob 10h, v predavalnici 3.07, Jadranska 21, Ljubljana
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COST Workshop on Modelling of Flowing Matter
16 - 18 February, Faculty of Mathematics and Physics, University of Ljubljana, Slovenia
http://flowing-matter2015.fmf.uni-lj.si/ 

 

Physics of Complex Colloids
14 - 18 May 2013, Cankarjev dom, Ljubljana
http://www.comploids2013.si

 

Workshop on assembling of superstructures in soft matter
11 - 13 October 2012, Klub Cankarjevega doma, Cankarjev dom, Ljubljana
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SLONANO 2012
24 - 26 October 2012, "Jožef Stefan" Institute
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Relativistic Positioning Systems and their Scientific Applications 
19 - 21 September 2012, Brdo pri Kranju, Slovenija
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Ljubljana Physics Summit 2012
March 3, 2012, "Jožef Stefan" Institute
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COINAPO Topical Meeting:
Composites of nanotubes and polymers:
joining theoretical modeling with experimental investigations
8 - 9 December 2011, Ljubljana, Slovenija
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Physics in Ljubljana
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Confined Liquid Crystals: Landmarks and Perspectives

19 - 20 July 2010, Ljubljana, Slovenija
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SLONANO 2009
19 - 21 October 2009, National Institute of Chemistry, Ljubljana, Slovenija
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ESF Research Conferences
Self-assembly of guanosine derivatives: from biological systems to nanotechnological applications
20 - 25 June 2009, Obergurgl, Austria
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4th European school in Material Sciences
Mechanical Properties of Complex Metallic Alloys
25 - 30 May 2009, MONS Hotel and Congress Centre, Ljubljana, Slovenija
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ESF Workshop
Towards single-spin physics
November 30, 2007, MONS Congress Center (Ravnikar room), Ljubljana, Slovenija
programme (pdf, 191 kb)

 

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7th European Symposium for the Protection of the Night Sky
Light Pollution and Global Warming
International Exhibition: Quality Lighting and Light Pollution
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International Liquid Crystal Elastomer Conference
27 - 29 September 2007, Ljubljana, Slovenija
ilcec2007.fiz.uni-lj.si/

 

Fundamentals of Nanoelectronics
2 - 7 September 2007, Portorož, Slovenija
www-f1.ijs.si/portoroz07/