Piotr Chudzinski, Institute for Theoretical Physics, Utrecht University

Jeudi 14 Avril 2016 14h
Amphi Holweck, Esc C,
1ème etage

From low energy collective modes in semimetals to a novel mechanism of Nernst effect in bismuth.

Abstract : We begin with introducing low energy collective modes in semimetals, the acoustic plasmons. We derive conditions of their existence and their effective hamiltonian. With this we are able to compute their influence on several transport coefficients. The first one is an electric resistivity where we obtain a crossover from a single particle to a collective Baber resistivity. Next we discuss briefly magneto-optical conductivity experiments. Finally, we incorporate lattice to our model and compute a plasmon-phonon coupling vertex which turns out to have a resonant structure. With this we can postulate a novel component of Nernst effect in bismuth and study its temperature dependence at low magnetic fields.

Haut de page



À lire aussi...

Georg Knebel, Univ. Grenoble Alpes, CEA Grenoble,

Jeudi 25 Fevrier 2016 14h Amphi Holweck, Esc C, 1ème etage Titre:U – based Ferromagnetic Superconductors In this talk we will present recent (...) 

> Lire la suite...

Hans-Joachim Grafe

Jeudi 8 Décembre 2016 à 14h00 Amphi Holweck, Esc C 1ème etage Impurity effects in S=1/2 Heisenberg spin chains as probed by nuclear magnetic (...) 

> Lire la suite...