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magstr_small.jpg31. 1. 2014
Frustration-induced nanometre-scale inhomogeneity in a triangular antiferromagnet

Researchers Andrej Zorko, Matej Andrej Komelj, and Denis Arčon from Institute »Jožef Stefan« and Faculty of mathematics and physics in collaboration with Othon Adamopoulosom and Alexandros Lappas from Institute of Electronic Structure & Laser, FORTH, Heraklion, Greece, discovered a novel complex state of matter. They published their discovery in the recent article Frustration-induced nanometre-scale inhomogeneity in a triangular antiferromagnet in the journal Nature Communications. In this work they report a paradigmatic magnetostructurally inhomogenous ground state of the geometrically frustrated α-NaMnO2 that stems from the system's aspiration to remove magnetic degeneracy and is possible only due to the existence of near-degenerate crystal structures. Using different experimental techniques they show that the spin configuration of a monoclinic phase is disrupted by magnetically short-range-ordered nanoscale triclinic regions. Such phase separation has never been observed before only in the magnetostructural channel but is reminiscent of charge driven phase inhomogeneities of otherwise chemically homogenous electronic systems in high-Tc cuprates or manganites showing colossal magnetoresistance.

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Research fields
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.
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
Complex analysis seminar Marko Slapar: CR imerzije in vložitve kompaktnih 4-mnogoterosti v C^3 Torek, 23.12.2014 ob 12:30, soba 3.06 na Jadranski 21
Geometric topology seminar Peter Lendero: Konfiguracijski prostori grafov, 2. del Sreda, 24. 12. 2014, ob 10h, v predavalnici 3.05, Jadranska 21, Ljubljana
Topology seminar Sašo Strle: Hirzebruchov izrek o signaturi mnogoterosti, zadnji del Ponedeljek, 22. december 2014 ob 12. uri v predavalnici 3.06 na Jadranski 21
Seminar for history of mathematical sciences Marko Razpet: Babilonski in egipčanski zapis števil Ponedeljek, 22. 12. 2014, 14.15-16.00, Jadranska 19, Plemljev seminar

Physics of Complex Colloids
14 - 18 May 2013, Cankarjev dom, Ljubljana


Workshop on assembling of superstructures in soft matter
11 - 13 October 2012, Klub Cankarjevega doma, Cankarjev dom, Ljubljana


24 - 26 October 2012, "Jožef Stefan" Institute


Relativistic Positioning Systems and their Scientific Applications 
19 - 21 September 2012, Brdo pri Kranju, Slovenija


Ljubljana Physics Summit 2012
March 3, 2012, "Jožef Stefan" Institute


COINAPO Topical Meeting:
Composites of nanotubes and polymers:
joining theoretical modeling with experimental investigations
8 - 9 December 2011, Ljubljana, Slovenija


Physics in Ljubljana
17 - 24 July 2011, Ljubljana, Slovenia


Confined Liquid Crystals: Landmarks and Perspectives

19 - 20 July 2010, Ljubljana, Slovenija


19 - 21 October 2009, National Institute of Chemistry, Ljubljana, Slovenija


ESF Research Conferences
Self-assembly of guanosine derivatives: from biological systems to nanotechnological applications
20 - 25 June 2009, Obergurgl, Austria


4th European school in Material Sciences
Mechanical Properties of Complex Metallic Alloys
25 - 30 May 2009, MONS Hotel and Congress Centre, Ljubljana, Slovenija


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


10 - 12 October 2007, Jožef Stefan Institute, Ljubljana, Slovenija








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



International Liquid Crystal Elastomer Conference
27 - 29 September 2007, Ljubljana, Slovenija


Fundamentals of Nanoelectronics
2 - 7 September 2007, Portorož, Slovenija