Universität zu Köln

Klages, Rainer ORCID: 0000-0003-3811-3070, Gallegos, Sol Selene Gil, Solanpaa, Janne ORCID: 0000-0001-9382-6474, Sarvilahti, Mika and Rasanen, Esa ORCID: 0000-0001-8736-4496 (2019). Normal and Anomalous Diffusion in Soft Lorentz Gases. Phys. Rev. Lett., 122 (6). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

Motivated by electronic transport in graphenelike structures, we study the diffusion of a classical point particle in Fermi potentials situated on a triangular lattice. We call this system a soft Lorentz gas, as the hard disks in the conventional periodic Lorentz gas are replaced by soft repulsive scatterers. A thorough computational analysis yields both normal and anomalous (super)diffusion with an extreme sensitivity on model parameters. This is due to an intricate interplay between trapped and ballistic periodic orbits, whose existence is characterized by tonguelike structures in parameter space. These results hold even for small softness, showing that diffusion in the paradigmatic hard Lorentz gas is not robust for realistic potentials, where we find an entirely different type of diffusion.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Klages, Rainer UNSPECIFIED orcid.org/0000-0003-3811-3070 UNSPECIFIED Gallegos, Sol Selene Gil UNSPECIFIED UNSPECIFIED UNSPECIFIED Solanpaa, Janne UNSPECIFIED orcid.org/0000-0001-9382-6474 UNSPECIFIED Sarvilahti, Mika UNSPECIFIED UNSPECIFIED UNSPECIFIED Rasanen, Esa UNSPECIFIED orcid.org/0000-0001-8736-4496 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-156619
DOI:	10.1103/PhysRevLett.122.064102
Journal or Publication Title:	Phys. Rev. Lett.
Volume:	122
Number:	6
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1079-7114
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DETERMINISTIC DIFFUSION; ELECTRONS; MAGNETOTRANSPORT; HONEYCOMB; DYNAMICS; ISLANDS; SYSTEMS; TERMS; CHAOS Multiple languages Physics, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15661