Dr Aviad Frydman, Bar Ilan University

Jeudi 15 décembre 2016 à 11h00
Amphi Boreau, Esc C
2ème etage

Specific Heat Measurements through the Superconductor-Insulator Quantum Phase Transition
Dr Aviad Frydman
Bar Ilan University

The superconductor-insulator transition (SIT) is a prototype of a quantum phase transition which is very versatile experimentally : varying a non-thermal tuning parameter such as disorder, thickness, composition, magnetic field or gate-voltage causes the system to switch from a superconductor to an insulator. Though there has been increasing interest in this topic, the SIT has never been addressed from a thermodynamic point of view. So far the experimental study of the SIT has mainly concentrated on dc resistivity based measurements such as transport and magnetoresistance and on global and local tunneling spectroscopy.

In my talk I will describe an experiment designed to go beyond conventional transport measurement. We use a unique highly sensitive setup to measure the specific heat of ultrathin Pb films through the SIT. We compare the specific heat signal of granular films and uniform films both driven through the transition. The evolution of the specific heat through the quantum critical point in both geometries provides important information on electronic phenomena in the vicinity of the quantum phase transition.

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...

Yaomin Dai, Los Alamos, MPA-CINT Los Alamos National Laboratory

Jeudi 31 Mars 2016 14h Amphi Holweck, Esc C 1ème etage Optical spectroscopy study of the Weyl semimetal TaAs Yaomin Dai Weyl semimetals (WSMs) are (...) 

> Lire la suite...