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The maximum entropy principle is applied to the formal derivation of isothermal, Euler-like equations for semiclassical fermions (electrons and holes) in graphene. After proving general mathematical properties of the equations so obtained,…

数学物理 · 物理学 2015-06-18 Luigi Barletti

The shape memory effect and pseudoelasticity in Cu nanowires is one possible pair of mechanisms that prevents high aspect ratio nanosized field electron emitters to be stable at room temperature and permits their growth under high electric…

材料科学 · 物理学 2016-04-22 Mihkel Veske , Stefan Parviainen , Vahur Zadin , Alvo Aabloo , Flyura Djurabekova

In this paper we develop a new model for the electron emission of high-Z nanoparticle irradiated by X-rays. This study is motivated by the recent advances about the nanoparticle enhancement of cancer treatment by radiotherapy. Our original…

原子物理 · 物理学 2014-06-18 R. Casta , J. -P. Champeaux , M. Sence , P. Moretto-Capelle , P. Cafarelli

The study of physical processes associated with particle acceleration in the open field line region above the polar cap (PC) of an isolated neutron star (NS) plays a fundamental role in our understanding and interpretation of high-energy…

天体物理学 · 物理学 2007-05-23 Alice K. Harding , Alexander G. Muslimov

Solids exposed to intense electric fields release electrons through tunnelling. This fundamental quantum process lies at the heart of various applications, ranging from high brightness electron sources in DC operation to petahertz vacuum…

In this contribution we describe some interesting interplay between quantum theory, general relativity and thermodynamics. In order to highlight the connection between these theories, we describe two approaches that allow to calculate…

广义相对论与量子宇宙学 · 物理学 2013-10-28 Giovanni Acquaviva

The secondary electron emission process is essential for the optimal operation of a wide range of applications, including fusion reactors, high-energy accelerators, or spacecraft. The process can be influenced and controlled by the use of a…

等离子体物理 · 物理学 2021-02-03 Claudiu Costin

In field electron emission (FE) studies, it is important to check and analyse the quality and validity of results experimentally obtained from samples, using suitably plotted current-voltage [I(V)] measurements. For the traditional plotting…

应用物理 · 物理学 2020-06-16 Mohammad M. Allam , Richard G. Forbes , Marwan S. Mousa

Starting from a classical thermodynamic approach, we derive rate-type equations to describe the behavior of heat flow in deformable media. Constitutive equations are defined in the material (Lagrangian) description where the standard time…

数学物理 · 物理学 2024-02-02 Claudio Giorgi , Angelo Morro , Federico Zullo

Understanding the interplay between illumination and the electron distribution in metallic nanostructures is a crucial step towards developing applications such as plasmonic photo-catalysis for green fuels, nano-scale photo-detection and…

光学 · 物理学 2019-07-23 Yonatan Dubi , Yonatan Sivan

Current theoretical description of field-induced electron emission remains mostly bounded by the classic Fowler-Nordheim (FN) framework developed nearly one century ago. For the emerging class of two-dimensional (2D) materials, many basic…

介观与纳米尺度物理 · 物理学 2017-11-17 Yee Sin Ang , M. Zubair , K. J. A. Ooi , L. K. Ang

The femtosecond evolution of the electronic temperature of laser-excited gold nanoparticles is measured, by means of ultrafast time-resolved photoemission spectroscopy induced by extreme-ultraviolet radiation pulses. The temperature of the…

Light absorption and scattering of plasmonic metal nanoparticles can lead to non-equilibrium charge carriers, intense electromagnetic near-fields, and heat generation, with promising applications in a vast range of fields, from chemical and…

光学 · 物理学 2020-08-27 Guillaume Baffou , Ivan Bordacchini , Andrea Baldi , Romain Quidant

Nanotechnology has not only provided us the possibility of developing quantum machines but also noncanonical power sources able to drive them. Here we focus on studying the performance of quantum machines driven by arbitrary combinations of…

介观与纳米尺度物理 · 物理学 2020-08-26 Sebastian E. Deghi , Raúl A. Bustos-Marún

In this paper we describe two approaches that allow to calculate some thermal features as perceived by different observers in curved spacetimes: the tunnelling method and the Unruh-DeWitt detector. The tunnelling phenomenon is a…

广义相对论与量子宇宙学 · 物理学 2013-01-16 Giovanni Acquaviva

Partial differential equations for the electric potential at finite temperature, taking into account the thermal Euler-Heisenberg contribution to the electromagnetic Lagrangian are derived. This complete temperature dependence introduces…

核理论 · 物理学 2017-10-11 A. Bermudez Manjarres , N. G. Kelkar , Marek Nowakowski

The plasma parameters such as electron distribution function and electron density of three atmospheric-pressure transient discharges namely filamentary and homogeneous dielectric barrier discharges in air, and the spark discharge of argon…

等离子体物理 · 物理学 2015-05-30 Sandra Keller , Priyadarshini Rajasekaran , Nikita Bibinov , Peter Awakowicz

Thermodynamic parameters such as temperature and pressure can be defined from the statistical behavior of a system. Therefore, thermal fluctuation is an inseparable characteristic of these parameters which eventually finds its way into…

计算物理 · 物理学 2017-02-28 Alek Bedroya , Mahmud Bahmanabadi

Temperature estimation, known as thermometry, is a critical sensing task for physical systems operating in the quantum regime. Indeed, thermal fluctuations can significantly degrade quantum coherence. Therefore, accurately determining the…

We report on the application of Atomic Force Microscopy (AFM) for studying the Field Emission (FE) properties of a dense array of long and vertically quasi-aligned multi-walled carbon nanotubes grown by catalytic Chemical Vapor Deposition…