Skyrmion

As Skyrmion ( by Tony Skyrme ) a model in the field of topology is called for stable vortices in fields in theoretical physics. These vortices behave like particles or quasi-particles of finite mass. For mathematical requirements, the model is explicitly nonlinear.

The model is highly mathematical. It was originally developed in high-energy physics. Meanwhile, there are solid-state physics applications that make the model for information technology interesting.

The skyrmions model modeled fermions ( nucleons ) as a special solitons of the field, where it emanates from Bosonenfeldern ( a nonlinear classical field corresponding to the exchange of mesons of the nuclear interaction ). It was especially popular in the early 1980s with the work of Edward Witten and various bag models (see also Kenneth A. Johnson) and has been discussed inter alia in connection with the quantum Hall effect in two-dimensional electron gases; currently it is also being studied at surfaces and interfaces of magnetic systems.

Beginning of 2009 was at the TU München Sebastian Mühlbauer, Christian Pfleiderer, Peter Böni, the theorist Achim Rosch and others for the first time a skyrmion lattice be detected directly ( at -245 ° C and in a magnetic field of 0.2 Tesla manganese silicon ) in a magnetic random. An application filed in September 2010 and published in July 2011 publication of a research group at the Universities of Kiel and Hamburg as well as the Research Centre Jülich describes the first detection of Skyrmions without external magnetic field. 2013 scientists from the University of Hamburg, targeted to produce skyrmions on a surface and delete them. The applications shall close in the field of information technology.