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Conventional impurity doping of deep nanoscale silicon (dns-Si) used in ultra large scale integration (ULSI) faces serious challenges below the 14 nm technology node. We report on a new fundamental effect in theory and experiment, namely…

Continuous solid electrolyte interface (SEI) formation remains the limiting factor of the lifetime of silicon nanoparticles (SiNPs) based negative electrodes. Methods that could provide clear diagnosis of the electrode degradation are of…

The electronic structure change of NiS$_{2-x}$Se$_x$ as a function of Se concentration $x$ has been studied by Ni $L$-edge X-ray absorption spectroscopy (XAS). The XAS spectra show distinct features in Ni $L_3$ edge, indicating whether the…

Strongly Correlated Electrons · Physics 2018-02-14 Jinwon Jeong , Kyung Ja Park , En-Jin Cho , Han-Jin Noh , Sung-Baek Kim , Hyeong-Do Kim

We look at the relationship between the preparation method of Si and Ge nanostructures (NSs) and the structural, electronic, and optical properties in terms of quantum confinement (QC). QC in NSs causes a blue shift of the gap energy with…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 Eric G. Barbagiovanni , David J. Lockwood , Raimundo N. Costa Filho , Lyudmila V. Goncharova , Peter J. Simpson

The atomic and electronic structure of a set of proposed thin (1.6 nm in diameter) silicon/silica quantum nanodots and nanowires with narrow interface, as well as parent metastable silicon structures (1.2 nm in diameter), was studied in…

The electronic band structure of complex nanostructured semiconductors has a considerable effect on the final electronic and optical properties of the material and, ultimately, on the functionality of the devices incorporating them. Valence…

Density functional theory and molecular dynamics simulations have been used to optimize the structure of nanowires of SiO2. The starting structures were based on b-cristobalite, orthotridymite, b-tridymite, and rutile crystals. The analysis…

Materials Science · Physics 2012-08-02 José I. Martínez , Federico Calle-Vallejo , Clifford M. Krowne , Julio A. Alonso

We analyze the effect of low dimensionality on the electrical conductivity ({\sigma}) and Seebeck coefficient (S) in ultra-narrow Si nanowires (NWs) by employing atomistic considerations for the electronic structures and linearized…

Materials Science · Physics 2015-06-16 Neophytos Neophytou , Hans Kosina

Nickel monosilicide (NiSi) has emerged as an excellent material of choice for source-drain contact applications below 45 nm node complementary metal-oxide-semiconductor (CMOS) technology. We have investigated the formation of nanoscale NiSi…

Materials Science · Physics 2017-03-08 Nasrin Banu , Biswarup Satpati , Anjan Bhukta , B. N. Dev

The NESSiE experiment is designed to perform an accurate measurement of muon-neutrino disappearance at small L/E, in order to severely constrain models with more than three-standard neutrinos, or even determine for the first time the…

High Energy Physics - Experiment · Physics 2015-04-23 Laura Pasqualini

The electronic structure in the new transition metal carbide Ti4SiC3 has been investigated by bulk-sensitive soft x-ray emission spectroscopy and compared to the well-studied Ti3SiC2 and TiC systems. The measured high-resolution Ti L, C K…

Without a periodic reference framework, local structures in noncrystalline solids are difficult to specify, but they still exert an enormous influence on materials properties. For example, thermomechanical responses of organic and inorganic…

Mesoscale and Nanoscale Physics · Physics 2017-03-08 Yang Lu , I-Wei Chen

Electronic structure properties of nanowires (NW) with diameters of 1.5 nm and 3 nm based on semimetallic $\alpha$-Sn are investigated by employing density functional theory and perturbative $GW$ methods. We explore the dependence of…

Materials Science · Physics 2017-01-04 Alfonso Sanchez-Soares , Conor O'Donnell , James C. Greer

Electronic structures for InxGa1-xAs nanowires with [100], [110], and [111] orientations and critical dimensions of approximately 2 nm are treated within the framework of density functional theory. Explicit band structures are calculated…

Mesoscale and Nanoscale Physics · Physics 2018-02-23 Pedram Razavi , James C. Greer

At a superconductor (S)-normal metal (N) junction pairing correlations can "leak-out" into the N region. This proximity effect [1, 2] modifies the system transport properties and can lead to supercurrent flow in SNS junctions [3]. Recent…

Mesoscale and Nanoscale Physics · Physics 2011-03-15 S. Roddaro , A. Pescaglini , D. Ercolani , L. Sorba , F. Giazotto , F. Beltram

Silicon is one of the most promising anode materials for Lithium-ion batteries. Silicon endures volume changes upon cycling, which leads to subsequent pulverization and capacity fading. These drawbacks lead to a poor lifespan and hamper the…

Materials Science · Physics 2022-12-23 Mariam Ezzedine , Fatme Jardali , Ileana Florea , Mihai-robert Zamfir , Costel-sorin Cojocaru

The nanostructure of hydrogenated amorphous silicon (a Si:H) is studied by a combination of small-angle X-ray (SAXS) and neutron scattering (SANS) with a spatial resolution of 0.8 nm. The a-Si:H materials were deposited using a range of…

Materials Science · Physics 2020-11-04 Eike Gericke , Jimmy Melskens , Robert Wendt , Markus Wollgarten , Armin Hoell , Klaus Lips

A nitridation annealing process is well employed to reduce interface trap states that degrade the channel mobility of 4H-SiC/SiO${}_2$ metal-oxide-semiconductor field-effect transistor. In recent experiments, the existence of high N-atom…

Materials Science · Physics 2021-12-15 Mitsuharu Uemoto , Naoki Komatsu , Yoshiyuki Egami , Tomoya Ono

A simulation framework that couples atomistic electronic structures to Boltzmann transport formalism is developed and applied to calculate the transport characteristics of thin silicon nanowires (NWs) up to 12nm in diameter. The…

Materials Science · Physics 2011-08-25 Neophytos Neophytou , Hans Kosina

Embedding silicon nanoparticles in an intermetallic matrix is a promising strategy to produce remarkable bulk anode materials for lithium-ion (Li-ion) batteries with low potential, high electrochemical capacity and good cycling stability.…

Materials Science · Physics 2021-01-06 Tahar Azib , Claire Thaury , Fermin Cuevas , Eric Leroy , Christian Jordy , Nicolas Marx , Michel Latroche
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