[APCTP Seminar]Quantum Criticality in He3 Bilayers Adsorbed on Graphite
* SPEAKERS
Name
Affiliation
E-mail
Mr. Adel Benlagra
CNRS, France
Prof. Ki-Seok KIM (APCTP) kimks(at)apctp.org
* HOST(Applicant)
Name
Affiliation
E-mail
-
* DATE / TIME
2009-09-17, 4pm
* PLACE
Seminar room 512., APCTP Headquarters
* ABSTRACT
We consider the recent experiments on He3 bilayers [Science 317, 1356 (2007)] showing evidence for a quantum critical point at which the first layer localizes. Using the Anderson lattice in two dimensions with the addition of a small dispersion of the f fermion, we model the system of adsorbed He3 layers. The first layer represents the f fermions at the brink of localization, while the second layer behaves as a free Fermi sea. We study the quantum critical regime of this system, evaluate the effective mass in the Fermi-liquid phase and the coherence temperature, and give a fit of the experiments and interpret its main features. Our model can serve as well as a predictive tool used for better determination of the experimental parameters.
[A. Benlagra and C. Pépin, Phys. Rev. B 79, 045112 (2009); Phys. Rev. Lett. 100, 176401 (2008).]
