نتایج جستجو برای: interlayer particles

تعداد نتایج: 162251  

2009
M. J. Gilbert

We discuss a methodology for calculating the interlayer transport characteristics of electron-hole bilayer graphene at spontaneous coherence using path integral Monte Carlo and recursive scattering matrices at room temperature. We find transport characteristics very similar to that of the quantum Hall bilayer case in that there is a large peak in the differential interlayer conductance at low i...

2001
A. V. Filinov M. Bonitz Yu. E. Lozovik

We present results of Monte-Carlo simulations for finite 2D single and bilayer systems. Strong Coulomb correlations lead to arrangement of particles in configurations resembling a crystal lattice. For binary layers, there exists a particularly rich variety of lattice symmetries which depend on the interlayer separation d. We demonstrate that in these mesoscopic lattices there exist two fundamen...

2012
He Hui Sun Feng Yun Guo Deng Yue Li Lu Wang Dong Bo Wang Lian Cheng Zhao

High Al content AlxGa1-xN/GaN multiple quantum well (MQW) films with different interlayers were grown by metal organic chemical vapor deposition. These MQWs were designed to achieve intersubband (ISB) absorption in the mid-infrared spectral range. We have considered two growth conditions, with AlGaN interlayer and GaN/AlN superlattice (SL) interlayer, both deposited on GaN-on-sapphire templates...

Journal: :Nano letters 2016
Shengxi Huang Liangbo Liang Xi Ling Alexander A Puretzky David B Geohegan Bobby G Sumpter Jing Kong Vincent Meunier Mildred S Dresselhaus

van der Waals homo- and heterostructures assembled by stamping monolayers together present optoelectronic properties suitable for diverse applications. Understanding the details of the interlayer stacking and resulting coupling is crucial for tuning these properties. We investigated the low-frequency interlayer shear and breathing Raman modes (<50 cm(-1)) in twisted bilayer MoS2 by Raman spectr...

2012
Ahmet Gürses Mehtap Ejder-Korucu Çetin Doğar

The aim of this study was the preparation of polyethylene oxide (PEO)/clay nanocomposites using organoclay produced via micellar adsorption of cethyltrimethyl ammonium bromide (CTAB) and their characterisation by X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectra, and the investigation of certain mechanical properties of the composites. The results show that the basal dista...

1997
J. R. Kirtley K. A. Moler

We have imaged the magnetic fields at the edges of the conducting planes of a single crystal of the layered organic superconductor κ-(BEDTTTF)2Cu(NCS)2. The spatial dependence of these fields agrees well with a Josephson-coupled layer model with some inhomogeneity in the interlayer coupling, providing a direct measurement of the interlayer coupling strength. This coupling is sufficiently weak a...

Journal: :Physical chemistry chemical physics : PCCP 2014
Takashi Yumura Ayumi Yamasaki

Density functional theory (DFT) calculations were employed to investigate the energetics of carbon dioxide migration within hydrated or anhydrous graphene oxides (GOs). When anhydrous GO structures contain a carbon dioxide molecule, the carbon dioxide interacts repulsively with the GO layers to increase the interlayer spacing. The repulsive electrostatic interactions are reduced by the insertio...

2017
Fang Wang Junyong Wang Shuang Guo Jinzhong Zhang Zhigao Hu Junhao Chu

The interlayer interaction of vertically stacked heterojunctions is very sensitive to the interlayer spacing, which will affect the coupling between the monolayers and allow band structure modulation. Here, with the aid of density functional theory (DFT) calculations, an interesting phenomenon is found that MoS2-WS2, MoS2-WSe2, and WS2-WSe2 heterostructures turn into direct-gap semiconductors f...

2016
J.I.A. Li T. Taniguchi K. Watanabe J. Hone

Spatially indirect excitons can be created when an electron and a hole, confined to separate layers of a double quantum well system, bind to form a composite Boson[1, 2]. Because there is no recombination pathway such excitons are long lived making them accessible to transport studies. Moreover, the ability to independently tune both the intralayer charge density and interlayer electron-hole se...

2016
Xiaoliang Zhang Yufei Gao Yuli Chen Ming Hu

Graphene and its bilayer structure are the two-dimensional crystalline form of carbon, whose extraordinary electron mobility and other unique features hold great promise for nanoscale electronics and photonics. Their realistic applications in emerging nanoelectronics usually call for thermal transport manipulation in a controllable and precise manner. In this paper we systematically studied the...

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