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nombre d'offres : 127

Understanding of the microscopic mechanisms governing resistive switching in valence change memories (VCMs)

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Start date : 1 October 2016

offer n° 20161001-LMGP-01

Among the various emerging devices expected to replace conventional Flash memories, Resistive Random Access Memories (ReRAM) are currently attracting a strong scientific and industrial interest. Their operations are based on the switching between a low resistive and a high resistive state, which represents the two binary states.
This PhD research project will focus on the understanding the microscopic mechanisms governing the resistive switching in pure and doped LaMnO3-δ oxides with perovskite-type structure, which will be studied as mixed ion-electron conducting memristive materials. Manganites such as LMO (LaMnO3-δ), LSMO (La1-xSrxMnO3-δ), PCMO (Pr1-xCaxMnO3-δ) and LPCMO (La0.325Pr0.3Ca0.375MnO3-δ) are among the most promising perovskite memristive materials reported in the literature, with On/Off ratios>103, operation speed down to 8 ns and endurance as large as 1010 cycles. Furthermore manganites such as La2/3Sr1/3MnO3-δ do not require an electroforming process, thus avoiding one of the major drawbacks for the implementation of memory devices based on RS phenomena. In addition, for this material the charge depletion effect is not only confined to the outermost surface layer, but its spatial extension and final HRS (high-resistance-state) can be modulated by the magnitude and duration of the potential applied, opening the door to the implementation of multilevel devices. The objective of this thesis is to acquire a better understanding of the nanoscale mechanisms governing the RS, charge carriers and interface effects in manganite-based ReRAM memories. This will be achieved by combining for the first time a unique set of complementary physical and chemical cutting-edge characterization methods, some of them enabling operando and spatially-resolved information. This knowledge is expected to lead to the design new nanostructured oxide films with tailored RS functionality and to the demonstration of the effectiveness and application of the optimized materials in reliable VCM memories with appropriate performance.

Modelling, fabrication and characterization of mechanical energy transducers based on piezoelectric nanowires

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Start date : 3 October 2016

offer n° IMEP-Lahc-20160510-CMNE

PhD Thesis proposal: Deadline for application 31/05/2016
Modelling, fabrication and characterization of mechanical energy transducers based on piezoelectric nanowires 
IMEP-LAHC / MINATEC / Grenoble-France

Nanotechnologies, Nanowires, Piezoelectricity, Semiconductor Physics and technology, Multiphysics modeling, Nanogenerator, Energy harvesting.

Context and objectives:
Nanowire devices are attracting a growing interest because of the unique electrical and mechanical properties that arise from their 1D structure. These properties are being explored advantageously for several kinds of applications, such as sensors and energy harvesting devices.
This Phd Thesis will concentrate on mechanical to electrical transduction based on ZnO nanowires (NW). Nanogenerators based on this principle are currently developed at IMEP-LaHC [1][2] in partnership with several laboratories and industrial companies in France and abroad (such as LMGP, INL, CEA/LETI, Georgia Tech, Korea Univ., STMicroelectronics…).


This project is both theoretical and experimental and has three primary goals:
Development of multi-physical models: Analytical and Finite Element Methods have been previously developed in our group to describe the energy conversion of individual NWs and NWs based transducers under different types of mechanical loading. The novelty will be to account for NW semiconducting properties, surface states and non-linear effects that are suspected to strongly affect device performance in practice. This will result in a better understanding of the underlying physics, the assessment of the respective weight of the different phenomena and the definition of the guidelines for device optimization.

Fabrication: ZnO NWs will be grown in collaboration with different partners (LMGP, INL…). These NWs will be integrated into composites over rigid and flexible substrates at IMEP-LaHC.

Characterization: Rigid and flexible transducers will be characterized thanks to dedicated test benches developed at IMEP. The methodology and techniques will be improved during the PhD thesis. One important objective of the project is to assess the reliability of these transducers. Eventually a benchmarking will be made to compare these transducers with other solutions (i.e. using piezoelectric thin films, other transduction mechanisms…)

The analysis of the experimental and modelling results will be used to obtain a better insight of the mechanical energy transduction at the nano scale, and to improve device efficiency.
The PhD student will benefit from an established collaboration framework and will have the opportunity to contribute to national and European projects related to energy harvesting for autonomous systems.
This PhD application will follow the competitive recruitment process of the EEATS Doctoral School of Grenoble Alpes University

[1] R. Tao, G. Ardila L. Montes and M. Mouis, Nano energy, 14, p.62-76 2015
[2] S. Lee, R. Hinchet, Y. Lee, Y. Yang, Z.-H. Lin, G. Ardila, L. Montes, M. Mouis, Z. L. Wang, Adv. Funct. Mater., 24, p. 1163-1168 2014.

More info:
The required skills for the PhD are:
– Background in electronics/physics or material science
– Basic knowledge in clean room technology
– Basic knowledge in electrical characterization techniques will be appreciated
– MEMS/NEMS experience will also be appreciated
– Basic knowledge in simulation tools (FEM based software…)

Gustavo ARDILA and Mireille MOUIS.

Doctoral Grant (net salary 1367.80€/month)

October/November 2016

3 years
Deadline for the application: 31/05/2016
About the laboratory:
IMEP-LAHC is located in the Innovation Center Minatec in Grenoble. The main research areas concern Microelectronic devices (CMOS, SOI, …), Nanotechnologies, Photonic and RF devices. It works in close partnership with several industrial groups such as ST-Microelectronics, IBM, … and platforms such as LETI, LITEN, IMEC, Tyndall. The training will be within the group working on MicroNanoElectronic Devices / Nanostructures & Nanosystems. The PhD student will have access to several technological (clean room) and characterization platforms.

Gustavo ARDILA  +33 (0)

  • Keywords : Engineering science, Electronics and microelectronics - Optoelectronics, IMEP-LaHc
  • Laboratory : IMEP-LaHc
  • CEA code : IMEP-Lahc-20160510-CMNE
  • Contact :

Elaboration of 3D electronic and RF circuits through digital printing technology for “communication systems”

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Start date : 1 September 2016

offer n° IMEP-Lahc-20160512-RFM

Printed electronic: rheology of complex fluids, surfaces and interfaces physico-chemistry, deposit processes, electromagnetic properties, plastic materials forming processes

Communication systems: electromagnetic modeling, multi-physic modeling for circuits for HF and RF communications, sensors, antenna, 3D RF components.

This thesis work is a part of the industrial Chair MINT funded for five years by the Foundation Grenoble INP. The project partners are two laboratories of University Grenoble Alpes, as well as the international Schneider Electric society, specialist of energy management.
This ambitious project aims to explore the new technologies sustainable and low cost of printing and of functional inks for the design of wireless communication functions in 3-dimensions inside plastic housings (electrical boxes, switches…).
After a preliminary study realized by a Post-Doctorant on conventional deposition processes – such as Screen Printing – and their adaptation to direct printing onto thermoplastic substrates used by Schneider Electric, the candidate will investigate the development of digital processes through a similar methodology:

– Characterization and adaptation of processes to 2D and 3D substrates
– Adaptation of 3D direct printing tools
– Conception of electronic circuits for IoT and RF for 2D and 3D shape factors
– Characterization of realized systems for a long term and robust performance

The expected work is multidisciplinary, involving knowledge in material rheology, surfaces and interfaces physico-chemistry on one hand, and RF and electronic circuitry design and modeling on the other hand. These competences will be devoted to the development, through digital printing processes, of new generation of 3D electronic circuits and wireless communication systems, from their design to their characterization.

Preferentially with a training in applied physics, the applicant will have to deal with aspects concerning both materials (rheology, physico-chemistry, …), communication systems, but also electromagnetics and multi-physic modeling. He will have to show a great curiosity and be able to build a large basis of knowledge, with the help of the whole skills constituted by Schneider Electric and the two world-renowned laboratories of Grenoble.
Due to the ambitious proposed subject, the PhD student will present his results in the major international conferences and will publish in the major journals of the explored domains.

· 2200 € gross/month

· Nadège Reverdy-Bruas (Grenoble INP/LGP2)
· Tan-Phu Vuong (Grenoble INP/IMEP-LaHC)

  • Keywords : Engineering science, Electronics and microelectronics - Optoelectronics, IMEP-LaHc
  • Laboratory : IMEP-LaHc
  • CEA code : IMEP-Lahc-20160512-RFM
  • Contact :

Electron quantum transport simulation of 2D material based devices

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Start date : 3 October 2016

offer n° IMEP-Lahc-20160608-CMNE

PhD position 2016­-2019

The application must be received before June 27th 2016



Since the discovery of graphene, many other layered materials have been synthetized. Among them, we mention the X­enes (silicene…), the X­anes (stanane…) and the transition metal dichalcogenides (molybdenum disulfite…). Depending on their composition and layering, these materials have very different properties, such as the presence of a direct or indirect band gap of different width. Together with the excellent electrostatic control due to their atomic thickness, this promotes 2D materials as promising candidates for developing logic devices for flexible low­ power electronics. The wide variety of 2D materials and of their defects calls for a large exploratory effort, which is still in its early phase. In this context, the simulation of electron quantum transport is an essential tool to understand the physics at the origin of the 2D material properties and to design innovative devices based on these original properties. The goal of the PhD is to theoretically and numerically investigate these new materials by exploring their electron transport properties and their applicative potential for innovative devices. These systems have an intrinsically quantum behavior, thus requiring the use of a general electron transport approach, such as the non­equilibrium Green’s function formalism, as well as an atomistic description based on the density functional theory.

The student will be asked to:

Simulate electron quantum transport in several 2D materials (mainly transition metal dichalcogenides and multilayer structures based on them), in pristine form or with disorder, by using atomistic Hamiltonians together with the TB_Sim code developed at CEA.

Develop a simulation code addressing electron transport in devices exploiting these 2D materials. More precisely, the codes developed at IMEP­-LaHC for other devices will be adapted to k.p models. These codes make use of the Green’s functions formalism, with a self­consistent treatment of the electrostatic potential and of the electron­phonon coupling.

Simulate electronic devices based on 2D materials, in particular field­effect and tunnel transistors (with lateral or vertical junctions), taking into account possible defects (dopants, impurities, structural defects) and their impact on variability.

Assess the performance of different transistor architectures with respect to their geometry, to the choice of the substrate, and to the electrostatic configuration.



Training in physics and electronics

Solid knowledge of condensed matter physics Basic knowledge of computer programming for numerical simulation

The candidate must hold a master degree (equivalent to a master M2R in France) or an equivalent university degree eligible for the EEATS Doctoral School of Université Grenoble Alpes.



Thesis supervisors: François TRIOZON (CEA­LETI) and Mireille MOUIS (IMEP­LaHC) Co­supervisors: Alessandro CRESTI (IMEP­LaHC) and Maud VINET (LETI/CEA) Funding: PhD grant from “labex MINOS”

Thesis starting date: October/November 2016

Thesis duration: 3 years


ABOUT THE RESEARCH INSTITUTES IMEP-­LAHC is a “unité mixte de recherche” involving Grenoble INP, Université Grenoble Alpes, Université Savoie Mont Blanc, and CNRS. It is located within the MINATEC innovation pole, in Grenoble. The laboratory employs 64 researchers, 18 engineers and technicians, 18 postdoctoral fellows, and 85 PhD students. It has collaborations with several universities and research centers, large industrial groups (STMicroelectronics, IBM, Motorola, etc.), and preindustrial microelectronics centers (LETI, LITEN, IMEC, Tyndall). CEA­LETI is a research institute for electronics and information technologies employing more than 1000 researchers, engineers, and technicians. It hosts a large technological platform (clean rooms, physicochemical characterization). It is mainly funded by industrial partnerships (STMicroelectronics, IBM, …). It relies on a strong scientific expertise: partnerships with CEA/DRF (Fundamental Research Division) and academic institutes (CNRS, Universities) via national and European funding.

The PhD student will work within the “groupe Composant MicroNanoElectronique” of IMEP-­LaHC and the “groupe Simulation et Modélisation” of LETI.



Send a CV, a letter of motivation, photocopies of diplomas and academic record with ratings, and two recommendation letters to:

Dr. François TRIOZON, Permanent researcher at CEA­LETI Tel: +33

Dr. Alessandro CRESTI, “Chargé de Recherche” at CNRS, IMEP­LaHC tél. +33

Dr. Mireille MOUIS, “Directeur de Recherche” at CNRS, IMEP-­LaHC tél. +33

The application must be received before June 27th 2016. Applications received after this date will be considered only if the funding deadline allows it.

  • Keywords : Electronics, Electronics and microelectronics - Optoelectronics, IMEP-LaHc
  • Laboratory : IMEP-LaHc
  • CEA code : IMEP-Lahc-20160608-CMNE
  • Contact :

Multi-scale impact of direct bonding on the internal stresses and strains

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Start date : 1 October 2016

offer n° SL-DRT-16-0557

Direct bonding is increasingly used for the development of very small structures (MEMS, NEMS, …) and for applications requiring a very precise alignment of the bonded surfaces (3D integration). However, the internal deformations potentially induced by the bonding can disturb the alignment of the two wafers at the scale of each component. Internal stresses that will result can also disrupt the operation of very small devices and deteriorate their performance. It is therefore significant to identify the origin of these strains, to measure them and to model the elastic deformations and their propagation.

This topic suggests coordinating academic and experimental work. First, various solutions of modeling and simulation (ANSYS) will be studied and their convergence will be discussed on simple assemblies. The experimental validation of this work will require the production and topological characterization of these simple structures (AFM, optical interferometry …) and measuring the adhesion energy available when bonding. Secondly, the simulation strategies applicable to more complex systems will be selected and implemented. Finally validation will be performed on bondings including alignment structures; thus internal deformations will be characterized (overlays), microstrains will be measured (ESRF X-ray diffraction, optical photoelasticity) and these data will be compared with simulation results. Finally, it is thus expected stresses and strains prediction of bonded assemblies by numerical simulation.

  • Keywords : Engineering science, Electronics and microelectronics - Optoelectronics, Solid state physics, surfaces and interfaces, DTSI, Leti
  • Laboratory : DTSI / Leti
  • CEA code : SL-DRT-16-0557
  • Contact :
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