[qmeso-seminar] Fwd: [quantum_materials_seminar] Christophe Marcenat, TOMORROW, Thursday, June 3, 2 p.m.

[Михаил Фейгельман]

Думаю что это интересный доклад.    МФ

---------- Forwarded message ---------
От: Florence Levy-Bertrand <florence.levy-bertrand at neel.cnrs.fr>
Date: ср, 2 июн. 2021 г. в 10:42
Subject: [quantum_materials_seminar] Christophe Marcenat, TOMORROW,
Thursday, June 3, 2 p.m.
To: Florence Levy-Bertrand <florence.levy-bertrand at neel.cnrs.fr>
Cc: <quantum_materials_seminar at listes.grenoble.cnrs.fr>


Dear colleagues,

Please find below the announcement for the TOMORROW Quantum Materials
seminar:
If relevant, don't forget to inform your internship students.

======================================
Date : Thursday, June 3, 2 p.m.
ZOOM link :
https://univ-grenoble-alpes-fr.zoom.us/j/94208912743?pwd=dm5jNnlWNWJWdWFSY3dPamxONnRnZz09
Speaker : Christophe Marcenat (CEA Grenoble)
Title : High resolution nanocalorimetery : a new tool for fermiology in
semimetals

Abstract:
Recent improvements in the technic to measure the specific heat allows to
detect quantum oscillations analogous to the Shubnikov-De Haas effect,
paving the way to a new route for fermiology in semi-metals.

I will briefly illustrate these new possibilities by on-going studies on a
Weyl semimetal, TaAs, and on ZrTe5 which exhibits a three-dimensional
quantum Hall effect and a field induced metal-insulator transition.

Finally, I will report on a study of specific heat in graphite in the ultra
quantum limit, when all carriers are confined in the lowest Landau level at
high magnetic field. The observation of a BCS-like specific heat jump in
both temperature and field sweeps establishes that the phase transition
discovered decades ago in graphite is of the second-order.  A slight
reduction in the amplitude of the magnetic field leads to a threefold
decrease of Tc and a drastic widening of the specific heat anomaly, which
acquires a tail spreading to two times Tc. This steady departure from the
mean-field BCS behavior is the consequence of a very low condensation
energy leading to an exceptionally large Ginzburg number in this dilute
metal.
======================================
Next seminars are :

Thursday 24 June: Victor Porée (PSI, Switzerland)
======================================

*Do not hesitate to propose speakers.*

Best regards,
Florence
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