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Nonperturbative dynamics in planar condensed matter systems

English title Nonperturbative dynamics in planar condensed matter systems
Applicant Wiese Uwe-Jens
Number 110848
Funding scheme SCOPES
Research institution Institut für Theoretische Physik Universität Bern
Institution of higher education University of Berne - BE
Main discipline Condensed Matter Physics
Start/End 01.09.2005 - 31.08.2008
Approved amount 66'980.00
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All Disciplines (2)

Condensed Matter Physics
Theoretical Physics

Keywords (5)

Quantum Hall effect; Dirac-type quasiparticles; Graphene; doped antiferromagnets; effective field theory

Lay Summary (English)

Lay summary
The quantum Hall effect is a nonperturbative collective many-body phenomenon arising in planar condensed matter systems in an external magnetic field. While the conductivity of a Hall sample vanishes in the direction of the electric field, it is quantized in the perpendicular direction. Graphene (a single layer ofgraphite) is a planar system with Dirac-type quasiparticle excitations, for which it is interesting to study the quantum Hall effect. Another class of nonperturbative planar condensed matter systems are antiferromagnets which may turn into high-temperature superconductors upon doping. Lightly doped antiferromagnets can be described by a systematic low-energy effective field theory for magnons and doped charge carriers. The goal of this joint project of Ukrainian and Swiss physicists is to gain a deeper theoretical understanding of these planar systems which are of central importance in modern condensed matter physics.
Direct link to Lay Summary Last update: 21.02.2013

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