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We investigate the contribution of charge puddles to the non-vanishing conductivity minimum in disordered graphene flakes at the charge neutrality point. For that purpose, we study systems with a geometry that suppresses the transmission…

介观与纳米尺度物理 · 物理学 2016-01-13 Leandro R. F. Lima , Caio H. Lewenkopf

Investigating solids with light gives direct access to charge dynamics, electronic and magnetic excitations. For heavy fermions, one has to adjust the frequency of the probing light to the small characteristic energy scales, leading to…

Theoretical calculations of the electrical conductivity and electroosmotic transfer as functions of the disperse phase volume fraction and non-dissolving boundary layer thickness were provided on the basis of the cell theory of…

软凝聚态物质 · 物理学 2007-05-23 D. Gulo , O. Alexejev

The screened Coulomb interaction between uniformly charged flat plates is considered at very small plate separations for which the Debye layers are strongly overlapped, in the limit of small electrical potentials. If the plates are of…

软凝聚态物质 · 物理学 2017-02-06 Sandip Ghosal , John D. Sherwood

This paper presents a new technique to study the adsorption and desorption of ions and electrons on insulating surfaces in the presence of strong electric fields in cryoliquids. The experimental design consists of a compact cryostat coupled…

Radiation detection in applications ranging from high energy physics to medical imaging rely on solid state detectors, often hybrid pixel detectors with (1) reverse biased p-n junction pixel sensors and (2) readout ASICs, attached by…

仪器与探测器 · 物理学 2017-06-06 G. Blaj , C. J. Kenney , J. Segal , G. Haller

The most fundamental response of a solid to a plasma and vice versa is electric. An electric double layer forms with a solid-bound electron-rich region-the wall charge-and a plasma-bound electron-depleted region-the plasma sheath. But it is…

等离子体物理 · 物理学 2020-11-16 F. X. Bronold , K. Rasek , H. Fehske

A continuum model to study the influence of dislocations on the electronic properties of condensed matter systems is described and analyzed. The model is based on a geometrical formalism that associates a density of dislocations with the…

介观与纳米尺度物理 · 物理学 2012-03-22 Fernando de Juan , Alberto Cortijo , María A. H. Vozmediano

When averaged over sources or disorder, cross-correlation of diffuse fields yield the Green's function between two passive sensors. This technique is applied to elastic ultrasonic waves in an open scattering slab mimicking seismic waves in…

其他凝聚态物理 · 物理学 2009-11-13 Eric Larose , Arnaud Derode , Dominique Clorennec , Ludovic Margerin , Michel Campillo

Theories of toughness of materials depend on an understanding of the characteristic instabilities of the crack tip, and their possible interactions. In this paper we examine the effect of dislocation emission on subsequent cleavage of a…

凝聚态物理 · 物理学 2007-05-23 J. Schiøtz , A. E. Carlsson , L. M. Canel , Robb Thomson

In a system with one conserved charge the charge diffusion is modified by non-linear self-interactions within an effective field theory (EFT) of diffusive fluctuations. We include the slowest ultraviolet (UV) mode, constructing a…

高能物理 - 理论 · 物理学 2024-03-21 Navid Abbasi , Matthias Kaminski , Omid Tavakol

In this work GEM and single-hole Thick GEM structures, composed of different coating materials, are studied. The used foils incorporate conductive layers made of copper, aluminium, molybdenum, stainless steel, tungsten and tantalum. The…

仪器与探测器 · 物理学 2021-11-08 B. Ulukutlu , P. Gasik , T. Waldmann , L. Fabbietti , T. Klemenz , L. Lautner , R. de Oliveira , S. Williams

A novel methodology, named the diffusion profile method, is proposed in this research to measure the electric field of a low gain avalanche detector (LGAD).The proposed methodology utilizes the maximum of the time derivative of the edge…

仪器与探测器 · 物理学 2023-11-30 Chenxi Fu , Haobo Wang , Tao Yang , Zijun Xu , Congcong Wang , Jianing Lin , Weimin Song , Ryuta Kiuchi , Xiaoshen Kang , Xin Shi , Suyu Xiao

We generalize the predictions for attractions between over-all neutral surfaces induced by charge fluctuations/correlations to non-uniform systems that include dielectric discontinuities, as is the case for mixed charged lipid membranes in…

软凝聚态物质 · 物理学 2009-10-31 Rebecca Menes , Philip Pincus , Bean Stein

Plasmons in two-dimensional electron systems with nonparabolic bands, such as graphene, feature strong dependence on electron-electron interactions. We use a many-body approach to relate plasmon dispersion at long wavelengths to Landau…

介观与纳米尺度物理 · 物理学 2013-12-19 L. S. Levitov , A. V. Shtyk , M. V. Feigelman

The barrel region of the CMS pixel detector will be equipped with ``n-in-n'' type silicon sensors. They are processed on DOFZ material, use the moderated p-spray technique and feature a bias grid. The latter leads to a small fraction of the…

How will the electrostatic interaction between two point charges change if they are shielded from the other by a dielectrical slab? While the physical setting of this electromagnetic problem is relatively simple, it is easy to be wronged…

经典物理 · 物理学 2023-03-20 Long T. Nguyen , Kim Tuan Do , Duy V. Nguyen , Trung Phan

We present a non-linear Thomas-Fermi theory which describes the electric charge screening in the system including two charged substrate layers separated by a few-layered graphene film. We show that by increasing the charge at the…

介观与纳米尺度物理 · 物理学 2013-11-05 Natalya A. Zimbovskaya

Resonant scattering of electrons with low energies (as compared to the bandwidth) on a single neutral short-range impurity in graphene is analyzed theoretically, taking into account the valley degeneracy. Resonances dramatically increase…

材料科学 · 物理学 2009-11-13 D. M. Basko

We investigate experimentally and theoretically thin layers of colloid particles held adjacent to a solid substrate by gravity. Epifluorescence, confocal, and holographic microscopy, combined with Monte Carlo and hydrodynamic simulations,…