Publications associées à Énergie potentielle électrostatique

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Joaquim Loizu Cisquella, Sophie Danielle Angelica Gorno, Claudia Colandrea, Marco Wischmeier, Cedric Kar-Wai Tsui, Mirko Wensing, Hugo De Oliveira

Recent TCV experiments confirm the predicted formation of an electric potential well, below the magnetic X-point, in configurations with unfavorable

B_t

field direction (ion

\nabla B

drift away from the divertor), that substantially reshapes the typica ...

2020

Spin-Dependent Thermoelectric Transport in Cobalt-Based Heusler Alloys

Haiming Yu, Simon Granville, Junfeng Hu

Sitting at the intersection of spintronics and thermoelectricity, research investigating the coupling of thermoelectric, magnetic, and electrical transport properties in materials has recently found that the ferromagnetic Heusler alloys are the ideal testb ...

WILEY-V C H VERLAG GMBH2020

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Joaquim Loizu Cisquella, Marco Wischmeier, Mirko Wensing

Fluid simulations of the boundary of fusion plasmas predict the formation of an electric potential well in the vicinity of the X-point in detached divertor conditions with Bt in the unfavorable direction for H-mode access. This potential well arises when t ...

2020

Highly spatially resolved mapping of the piezoelectric potentials in InGaN quantum well structures by off-axis electron holography

The internal fields in 2.2nm thick InGaN quantum wells in a GaN LED structure have been investigated by using aberration-corrected off-axis electron holography with a spatial resolution of better than 1nm. To improve the spatial resolution, different types ...

2020

Machine-Learning of Atomic-Scale Properties Based on Physical Principles

Michele Ceriotti, Michael John Willatt

We briefly summarize the kernel regression approach, as used recently in materials modelling, to fitting functions, particularly potential energy surfaces, and highlight how the linear algebra framework can be used to both predict and train from linear fun ...

Springer International Publishing2020

Finite beta effects on short wavelength ion temperature gradient modes

Laurent Villard

The electromagnetic effect is studied on the short wavelength branch of the ion temperature gradient mode in the linear regime for the first time using a global gyrokinetic model. The short wavelength ion temperature gradient mode growth rate is found to b ...

2020

High resolution CryoEM structure of the ring-shaped virulence factor EspB from Mycobacterium tuberculosis

Stewart Cole, Florence Pojer, Jérémie Piton

The EspB protein of Mycobacterium tuberculosis is a 60 kDa virulence factor, implicated in conjugation and exported by the ESX-1 system of which it may also be a component. Previous attempts to obtain high-resolution maps of EspB by cryo-electron microscop ...

2020

Adhesive wear and interaction of tangentially loaded micro-contacts

Jean-François Molinari, Son-Jonathan Pham-Ba, Tobias Brink

Current engineering wear models are often based on empirical parameters rather than built upon physical considerations. Here, we look for a physical description of adhesive wear at the microscale, at which the interaction between two surfaces comes down to ...

2020

Interplay of anomalous strain relaxation and minimization of polarization changes at nitride semiconductor heterointerfaces

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Yi Wang

We present a methodology to quantify polarization and electron affinity changes at interfaces by combining scanning tunneling spectroscopy, off-axis electron holography in transmission electron microscopy (TEM), and self-consistent calculations of the elec ...

AMER PHYSICAL SOC2020

Energy-based descriptors for photo-catalytically active metal–organic framework discovery

Berend Smit, Ivano Tavernelli, Gloria Capano, Maria Fumanal Quintana, Senja Dominique Barthel

Metal–organic frameworks (MOFs) consist of metal nodes that are connected by organic linkers. They are thus highly chemically tunable materials given the broad range of potential linkers and nodes that can be chosen for their synthesis. Their tunability ha ...

2020

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Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Spin-Dependent Thermoelectric Transport in Cobalt-Based Heusler Alloys

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Highly spatially resolved mapping of the piezoelectric potentials in InGaN quantum well structures by off-axis electron holography

Machine-Learning of Atomic-Scale Properties Based on Physical Principles

Finite beta effects on short wavelength ion temperature gradient modes

High resolution CryoEM structure of the ring-shaped virulence factor EspB from Mycobacterium tuberculosis

Adhesive wear and interaction of tangentially loaded micro-contacts

Interplay of anomalous strain relaxation and minimization of polarization changes at nitride semiconductor heterointerfaces

Energy-based descriptors for photo-catalytically active metal–organic framework discovery

Machine-Learning of Atomic-Scale Properties Based on Physical Principles

High resolution CryoEM structure of the ring-shaped virulence factor EspB from Mycobacterium tuberculosis

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Interplay of anomalous strain relaxation and minimization of polarization changes at nitride semiconductor heterointerfaces

Spin-Dependent Thermoelectric Transport in Cobalt-Based Heusler Alloys

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Finite beta effects on short wavelength ion temperature gradient modes

Adhesive wear and interaction of tangentially loaded micro-contacts

Highly spatially resolved mapping of the piezoelectric potentials in InGaN quantum well structures by off-axis electron holography

Energy-based descriptors for photo-catalytically active metal–organic framework discovery