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We have fabricated air-stable n-type, ambipolar carbon nanotube field effect transistors (CNFETs), and used them in nanoscale memory cells. N-type transistors are achieved by annealing of nanotubes in hydrogen gas and contacting them by…

介观与纳米尺度物理 · 物理学 2015-06-24 M. Radosavljevic , M. Freitag , K. V. Thadani , A. T. Johnson

We predict resistance anomalies to be observed at high mobility two dimensional electron systems (2DESs) in the fractional quantized Hall regime, where the narrow (L <10 ?m) Hall bar is defined by top gates. An analytic calculation scheme…

介观与纳米尺度物理 · 物理学 2010-12-09 A. Salman , A. I. Mese , M. B. Yucel , A. Siddiki

We study the ground state and magnetic hysteresis properties of 2$d$ arrays ($L^{}_x\times L^{}_y$) of dipolar interacting magnetic nanoparticles (MNPs) by performing micromagnetic simulations. Our primary interest is to understand the…

材料科学 · 物理学 2021-11-02 Manish Anand

Under the right circumstances, inertial particles (such as sand or dust) settling through the atmospheric boundary layer can experience a net enhancement in their average settling velocity due to their inertia. Since this enhancement arises…

流体动力学 · 物理学 2023-07-26 Andrew P. Grace , David H. Richter , Andrew D. Bragg

We investigate properties of the symmetry term in the equation-of-state (EOS) of nuclear matter (NM) from the analysis of simulations of fragmentation events in intermediate energy heavy ion collisions. For charge asymmetric systems a…

核理论 · 物理学 2016-09-08 V. Baran , M. Colonna , M. Di Toro , V. Greco , M. Zielinska-Phabe , H. H. Wolter

Accurate thermal emission models of neutron stars are essential for constraining the dense matter equation of state. However, incorporating realistic magnetic field structures is computationally prohibitive, severely constraining feasible…

The possibility of finding multistability in the density and current of an interacting nanoscale junction coupled to semi-infinite leads is studied at various levels of approximation. The system is driven out of equilibrium by an external…

介观与纳米尺度物理 · 物理学 2015-06-03 E. Khosravi , A. -M. Uimonen , A. Stan , G. Stefanucci , S. Kurth , R. van Leeuwen , E. K. U. Gross

This study investigates the first-order phase transition within neutron stars, leveraging the deep neural network (DNN) framework alongside contemporary astronomical measurements. The equation of state (EOS) for neutron stars is delineated…

核理论 · 物理学 2024-07-17 Wenjie Zhou , Hong Shen , Jinniu Hu , Ying Zhang

We propose a mechanism for nanoscale energy conversion, an electric voltage induced by a temperature gradient in a junction composed of the same material having exactly the same geometric sizes, but distinct shapes. The proposed effect…

介观与纳米尺度物理 · 物理学 2020-08-26 Altug Sisman , Alhun Aydin , Jonas Fransson

We investigate a nanoscale dielectric capacitor model consisting of two-dimensional, hexagonal h-BN layers placed between two commensurate and metallic graphene layers using self-consistent field density functional theory. The separation of…

介观与纳米尺度物理 · 物理学 2013-07-30 V. Ongun Özçelik , S. Ciraci

We develop equation of state (EoS) of proto-neutron stars (PNSs) at various stages of evolution by varying entropy per baryon $S$, using the Korea-IBS-Daegu-SKKU density functional model. With finite values for both temperature and density,…

核理论 · 物理学 2025-11-26 Atanu Guha , Debashree Sen , Hana Gil , Hajime Togashi , Chang Ho Hyun

Perturbative, or effective field theory (EFT)-based, full-shape analyses of galaxy clustering data involve ``nuisance parameters'' to capture various observational effects such as the galaxy-dark matter connection (galaxy bias). We present…

宇宙学与河外天体物理 · 物理学 2024-09-11 Mikhail M. Ivanov , Carolina Cuesta-Lazaro , Siddharth Mishra-Sharma , Andrej Obuljen , Michael W. Toomey

We study the anisotropic electronic properties of 2D SnS, an analogue of phosphorene, grown by physical vapor transport. With transmission electron microscope and polarized Raman spectroscopy, we identify the zigzag and armchair directions…

介观与纳米尺度物理 · 物理学 2016-12-30 Zhen Tian , Chenglei Guo , Mingxing Zhao , Ranran Li , Jiamin Xue

In this work, we investigate the electrical conductivity of carbon nanotubes (CNTs), with a particular focus on the effects of doping. Using a first-principles approach, we study the electronic structure, phonon dispersion, and…

材料科学 · 物理学 2024-08-07 Mina Yoon , German D. Samolyuk , Kai Li , James A. Hayne , Tolga Aytug

We report density-functional theory (DFT), atomistic simulations of the non-equilibrium transport properties of carbon nanotube (CNT) field-effect transistors (FETs). Results have been obtained within a self-consistent approach based on the…

介观与纳米尺度物理 · 物理学 2007-05-23 L. Latessa , A. Pecchia , A. Di Carlo

By means of the effective-field theory (EFT) with correlations, the thermodynamic and magnetic quantities such as magnetization, susceptibility, internal energy, free energy, hysteresis curves and compensation behaviors of the spin-1/2…

统计力学 · 物理学 2013-12-30 Yusuf Kocakaplan , Ersin Kantar

Effects of weak electric fields on resonant energy transfer between NH$_3$ in the X $^1$A$_1$ ground electronic state, and Rydberg He atoms in triplet states with principal quantum numbers $n = 36$-$41$ have been studied in a crossed beam…

原子物理 · 物理学 2017-05-04 V. Zhelyazkova , S. D. Hogan

We present a physics-based compact model for two-dimensional (2D) field-effect transistors (FETs) based on monolayer semiconductors such as MoS2. A semi-classical transport approach is appropriate for the 2D channel, enabling simplified…

介观与纳米尺度物理 · 物理学 2019-08-14 Saurabh V. Suryavanshi , Eric Pop

In this work we provide new insights into the transformer architecture, and in particular, its best-known variant, BERT. First, we propose a method to measure the degree of non-linearity of different elements of transformers. Next, we focus…

计算与语言 · 计算机科学 2021-05-10 Sumu Zhao , Damian Pascual , Gino Brunner , Roger Wattenhofer

We study the nanoscale phase coexistence of ferromagnetic metallic (FMM) and antiferromagnetic insulating (AFI) regions by including the effect of AF superexchange and weak disorder in the double exchange model. We use a new Monte Carlo…

强关联电子 · 物理学 2009-11-10 Sanjeev Kumar , Pinaki Majumdar