Bulletin of the American Physical Society
APS March Meeting 2013
Volume 58, Number 1
Monday–Friday, March 18–22, 2013; Baltimore, Maryland
Session R25: Focus Session: Computational Studies of Heterostructures
2:30 PM–5:30 PM,
Wednesday, March 20, 2013
Room: 327
Sponsoring
Unit:
DCOMP
Chair: Shiwei Zhang, College of William and Mary
Abstract ID: BAPS.2013.MAR.R25.1
Abstract: R25.00001 : Competition of magnetism and Kondo physics in heterostructures
2:30 PM–3:06 PM
Preview Abstract
Abstract
Author:
Simone Chiesa
(College of William and Mary)
Heterostructures made of atomically thin strongly correlated materials have been the focus of intense experimental and theoretical study. We report on results obtained using an unbiased numerical technique on a simple model of a metal-magnetic insulator interface: a multilayer system governed by a tight-binding Hamiltonian in which the interaction is nonzero on one set of adjacent planes and zero on another. As the interface hybridization is tuned, magnetic and metallic properties undergo an evolution that reflects the competition between antiferromagnetism and (Kondo) singlet formation, in a scenario similar to that occurring in heavy-fermion materials. Remarkably, for a few-layer system at intermediate hybridization, a Kondo insulating phase results, where magnetic order and conductivity are suppressed in all layers. As more insulating layers are added, magnetic order is restored in all correlated layers except the one at the interface and no evidence of long-range magnetic order induced in the metallic layers is found.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2013.MAR.R25.1
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