Missions

At the interface between two oxide materials, structural and electronic reconstruction may produce exotic, two-dimensional electronic states. This is the case when combining SrTiO3 (STO) and LaAlO3 (LAO) that are both wide bandgap semiconductor while their interface harbors a 2-dimensional electron gas (2DEG) that is superconducting at low temperature and possesses a highly tunable Rashba spin-orbit coupling. The 2DEG at the LAO/STO interface was discovered in 2004 and since then our group has harnessed its properties for electronics and spintronics – for instance using its Rashba character to perform efficient spin-charge interconversion – but also expanded its functionalities by endowing it with ferroic orders (ferroelectricity and/or magnetism) and explored 2DEGs in other systems such as KTaO3 (KTO).
The project we propose aims to further engineer oxide interfaces to reveal novel states of matter including (i) a ferromagnetic Rashba state formed in ferromagnetic STO 2DEGs, displaying spontaneous nonreciprocal transport; (ii) 2D hole gases in STO and KTO, in which we will assess spin-orbit physics and search for hole-based superconductivity; (iii) high-mobility 2DEGs at room temperature based on BaSnO3.

Activités

- device patterning (UV lithography)
- magnetotransport measurements
- analysis of results
- writing scientific articles
And possibly
- sample preparation by pulsed laser ablation and/or sputtering

Compétences

- Condensed matter physics
- Materials science
- Electrical transport
- Electronics
- Instrumentation
- Python programming

Contexte de travail

This experimental physics project will be performed at the Laboratoire Albert Fert CNRS, Thales, Université Paris-Saclay in Palaiseau (France), in strong collaboration with the Paul Drude Institute in Berlin (Germany) who will provide most of the samples, and with the LPEM laboratory of the ESPCI in Paris (France).

Contraintes et risques

N/A