Home > Research
In spotlight

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.

Collaborations

The Faculty of Mathematics and Physics works in close collaboration with the following institutions in Slovenia:

Research fields
Mathematics
The Department of Mathematics’ research is strongly connected to the work of the Institute of Mathematics, Physics and Mechanics.  Our members are active in 17 fields of research.
Physics
Each and every lecturer and assistant is involved in research.  Members of the Department of Physics head research groups at the Department and at the institutes.
This week
Monday physics colloquium Prof. Siegfied Dietrich: Critical Casimir Forces Ponedeljek, 1. junij 2015, ob 16:15 v predavalnici F1, FMF UL, Jadranska 19, Ljubljana
Seminar for probability, statistics, and financial mathematics Branko Urošević: Mean-capital optimization Četrtek, 28. maja 2015, ob 14:30 v predavalnici 3.06 na FMF, Jadranska 21, Ljubljana
Numerical analysis seminar Marjeta Krajnc: Ploskve s pitagorejsko normalo (2. del) Sreda, 27.5.2015, od 10h do 11h v sobi 3.06 na Jadranski 21
Operator theory seminar Michal Zajac: Reflexivity and hyperreflexivity of intertwiners Četrtek, 28. 5. 2015, ob 12:30, v predavalnici 3.06 na Jadranski 21
Activities

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
http://www.softmatter.si/hierarchy2012/  

 

SLONANO 2012
24 - 26 October 2012, "Jožef Stefan" Institute
http://www.slonano.si/

 

Relativistic Positioning Systems and their Scientific Applications 
19 - 21 September 2012, Brdo pri Kranju, Slovenija
http://rgnss.fmf.uni-lj.si/workshop

 

Ljubljana Physics Summit 2012
March 3, 2012, "Jožef Stefan" Institute
http://www.physics-summit.com

 

COINAPO Topical Meeting:
Composites of nanotubes and polymers:
joining theoretical modeling with experimental investigations
8 - 9 December 2011, Ljubljana, Slovenija
http://www.fmf.uni-lj.si/si/raziskave/coinapo-meeting/

  

Physics in Ljubljana
17 - 24 July 2011, Ljubljana, Slovenia
http://phylju11.fmf.uni-lj.si/

  

banner_confinedLC.jpg
Confined Liquid Crystals: Landmarks and Perspectives

19 - 20 July 2010, Ljubljana, Slovenija
http://clc.fmf.uni-lj.si

 

SLONANO 2009
19 - 21 October 2009, National Institute of Chemistry, Ljubljana, Slovenija
http://www.slonano.si/ 

 

ESF Research Conferences
Self-assembly of guanosine derivatives: from biological systems to nanotechnological applications
20 - 25 June 2009, Obergurgl, Austria
http://www.esf.org/activities/esf-conferences/details/2009/confdetail289.html?conf=289&year=2009

 

4th European school in Material Sciences
Mechanical Properties of Complex Metallic Alloys
25 - 30 May 2009, MONS Hotel and Congress Centre, Ljubljana, Slovenija
http://euroschool-cma.ijs.si/

 

ESF Workshop
Towards single-spin physics
November 30, 2007, MONS Congress Center (Ravnikar room), Ljubljana, Slovenija
programme (pdf, 191 kb)

 

SLONANO2007pic.jpgSLONANO2007
10 - 12 October 2007, Jožef Stefan Institute, Ljubljana, Slovenija
http://nano.ijs.si/SLONANO2007/

 

 

 

 

 

 

contact.jpg

7th European Symposium for the Protection of the Night Sky
Light Pollution and Global Warming
International Exhibition: Quality Lighting and Light Pollution
5 - 6 October 2007, Bled, Slovenija
www.darksky2007.si

 

liquid-crystal.jpg

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/