Exciton Condensation

Excitons are pairs of electrons and holes inside a solid material that together behave like a single particle. It has long been suspected that when many such excitons exist in the same piece of matter, they can form a Bose-Einstein condensate. However, actually proving that Bose-Einstein condensation of excitons occurs in any real material has been a challenge for physicists for decades. Experimental evidence of such a state has been found!

A comment about the discovery: Spontaneous Bose-Einstein condensation of excitons

The scientific article: Signatures of exciton condensation in a transition metal dichalcogenide

 

 

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The Nobel Prize in Physics 2016

“This year’s Laureates opened the door on an unknown world where matter exists in strange states. The Nobel Prize in Physics 2016 is awarded with one half to David J. Thouless, University of Washington, Seattle, and the other half to F. Duncan M. Haldane, Princeton University, and J. Michael Kosterlitz, Brown University, Providence. Their discoveries have brought about breakthroughs in the theoretical understanding of matter’s mysteries and created new perspectives on the development of innovative materials.

The three Laureates’ use of topological concepts in physics was decisive for their discoveries. Topology is a branch of mathematics that describes properties that only change step-wise. Using topology as a tool, they were able to astound the experts. ”

 

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Read more about this year’s prize

Popular Science Background
Scientific Background

from  www.nobelprize.org/nobel_prizes/physics