SQUID-on-tip microscopy to study non-Fourier heat transport

by Dr Arthur Marguerite (ESPCI, Paris)

Monday 1 Jun 2026, 14:00 → 15:00 Asia/Shanghai

Tsung-Dao Lee Institute/N1F-N102 - Smart Classroom (Tsung-Dao Lee Institute)

Host: Prof. Haibiao Zhou  

Venue: TDLI Meeting Room N102

Tencent Meeting link:  https://meeting.tencent.com/dm/3GiXsDiPWHVL

Meeting ID: 998678890, no password

 

Abstract:

The SQUID-on-tip (SOT) technique, with its high magnetic and thermal sensitivity and nanoscale spatial resolution, offers a powerful platform for probing local thermal and electronic properties in quantum materials. In this seminar, I will introduce the SOT method and discuss its unique capabilities for investigating deviations from Fourier’s law of heat conduction, particularly in the context of phonon hydrodynamics. By enabling direct, non-invasive measurements of temperature at the nanoscale, SOT can provide critical insights into the emergence of hydrodynamic phonon regimes, where momentum-conserving collisions dominate over resistive scattering. Furthermore, I will explore how this technique could be extended to study the thermal phonon Hall effect where transverse thermal currents arise in response to temperature gradients in the presence of a strong external magnetic fields.

 

Biography:

Arthur graduated in 2017 from Sorbonne University where he worked in the group of Gwendal Fève on electron interferometry in the quantum Hall edge states (in AlGaAs/GaAs 2DEG). He then went on a first postdoc in the group of Eli Zeldov where he learnt the SQUID-on-tip microscopy technique and used it to study dissipation mechanisms in the quantum Hall edge states of graphene. In 2020, he went back to Paris as a postdoc to join the group of Çağlar Girit to study Josephson physics in atomic break junction. He got a permanent position at CNRS in 2022 and joined the Laboratoire de Physique et d'étude des matériaux (LPEM) at Ecole Supérieure de Physique et Chimie Industrielle (ESPCI) in Paris.