Oxide-Based Heterostructures: Advanced Electrical Characterization And Applications

1 Sep 2023

Job Information

Organisation/Company

GREYC UMR CNRS 6072

Research Field

Engineering » Electronic engineering

Technology » Materials technology

Physics

Researcher Profile

Recognised Researcher (R2)

Leading Researcher (R4)

First Stage Researcher (R1)

Established Researcher (R3)

Country

France

Application Deadline

30 Sep 2023 - 22:00 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

The aim of this thesis is to exploit the remarkable properties of functional oxides for electronics. La0.7Sr0.3MnO3 (LSMO) belongs to this family of functional oxides, oxides with strongly correlated electrons in which a strong coupling is observed between different characteristics of the material: structure, charge, spin 1. This means that even a weak external stimulus can induce significant changes in properties, which we are exploiting to build sensors. For example, the potential of LSMO thin films for uncooled bolometric detection in the visible/near infrared range has been demonstrated at GREYC in recent years 2, 3.

Thanks to its expertise in bolometric detection, but also in active components on III-V components (diodes, Si- or GaN-based transistors) 4, GREYC's Electronics team is proposing, through this thesis, to develop new innovative sensors based on LSMO heterostructures Heterostructures based on functional oxides could indeed exhibit a high signal-to-noise ratio (very high detection sensitivity) and a very fast response without a major cooling system. These new sensors could be state-of- the-art. This type of uncooled, high-sensitivity, fast-detection sensor could find numerous applications in several fields (ultra-fast UV photodetection for molecular spectroscopy or remote detection of pollutants, high-sensitivity SWIR detection, photodetection for ultra-fast SWIR LIDAR systems).

The points to be addressed during the thesis will be:

Production of thin-film oxide devices using pulsed laser ablation (PLD) and laser lithography

Study of electrical properties,

Study of defects using DLTFS (Deep Level Transient Fourier Spectroscopy).

References: 1 Towards Oxide Electronics: a Roadmap, M. Coll et al. Appl. Surf. Sci., 482, 1-94 (2019) 2 Key Parameters for Detectivity Improvement of Low Noise Anisotropic Magnetoresistive Sensors Made of La2/3Sr1/3MnO3 Single Layers on Vicinal Substrates, L.G. Enger et al., ACS Applied Materials and Interfaces 5, 2, 729–739 (2023) DOI : 10.1021/acsaelm.2c01096 . 3 Electro-thermal and optical characterization of an uncooled suspended bolometer based on an epitaxial La0.7Sr0.3MnO3 film grown on CaTiO3/Si, V.M. Nascimento et al. J. Phys. D: Appl. Phys. 54 055301 (2021) DOI: 10.1088/1361-6463/abbfca; Free-standing La0.7Sr0.3MnO3 suspended microbridges on buffered silicon substrates showing undegraded low frequency noise properties, S. Liu et al. J. Micromech. Microeng. 29 065008 (2019) 4 Characterization of defect states in Mg-doped GaN-on-Si p+ n diodes using deep-level transient Fourier spectroscopy, Y. Lechaux et al. Semicond. Sci. Technol., 36, 2, 024002 (2020) https: // doi.org/10.1088/1361-6641/abcb19 ; Impact of the in situ SiN Thickness on Low-Frequency Noise in MOVPE InAlGaN/GaN HEMTs, M.Rzin et al., IEEE Trans. Electron Devices, 66, 12, 580 (2019) DOI: 10.1109/TED.2019.2945296 ; Impact of Gate–Drain Spacing on Low-Frequency Noise Performance of In Situ SiN Passivated InAlGaN/GaN MIS-HEMTs, M. Rzin et al., IEEE Trans. Electron Devices, 64, 7, 2820 (2017) DOI: 10.1109/TED.2017.2703809

Funding category: Contrat doctoral

PHD title: Doctorat en Electronique, microélectronique, optique et lasers, optoélectronique microondes PHD Country: France

Requirements

Specific Requirements

Master or equivalent diploma.

For this strong multidisciplinary subject, profiles based on/or merging competencies of electronics, sensors, physics, material physics and / or micro-technology clean room will be considered with a great attention. The proposed thesis is for curious, inventive, dynamic candidates having a strong scientific background and a sense of collaborative works. Experience of research and experimentation will be appreciated extra points.

Additional Information Work Location(s)

Number of offers available

1

Company/Institute

GREYC UMR CNRS 6072

Country

France

City

Caen

Where to apply

Website

https: // www. abg.asso.fr/fr/candidatOffres/show/idoffre/116373

Contact

Website

https: // www. greyc.fr/en/equipes/electronics/

STATUS: EXPIRED