Results 121 to 130 of about 2,271,409 (257)

Modeling Impurity Effects in Graphene Quantum Dots: A Python Framework for Impurity-Induced Valley Splitting and Quantum Transport

Advances in Condensed Matter Physics
We present a Python based open-source framework to model impurity effects in graphene quantum dots (GQDs). The framework integrates tight-binding and continuum Dirac models to simulate Coulombic and magnetic impurity potentials, enabling detailed ...
Yohannes Achenefe Nigusie
doaj   +1 more source

Parity‐Dependent THz Harmonic Generation in Electrically Pumped Micro‐Lasers Exploiting Topological Insulator–Metamaterial Gratings

Advanced Materials, EarlyView.
Topological insulator–metamaterials integrated with electrically driven terahertz quantum cascade lasers enable parity‐dependent harmonic generation. Bulk‐dominated Bi2Se3 favors third‐harmonic emission at 9.96 THz, whereas topological‐surface‐state‐dominated Bi2Se3, Bi2Te3, and (Bi,Sb)2Te3 generate strong second harmonics near 6.5 THz.
Alessandra Di Gaspare, Craig S. Knox, Ahmet Yagmur, Sara Ghayeb Zamharir, Lianhe Li, Satoshi Sasaki, A. Giles Davies, Edmund H. Linfield, Joshua R. Freeman, Miriam S. Vitiello   +9 more
wiley   +1 more source

Impurity transport in tokamaks

, 1976
A review is given of the principle results of the neoclassical theory of impurity transport in tokamaks, emphasizing those collisionality regimes of most practical interest.
Rutherford, P. H., Seidl, F. G. P., Post, D. E., Jensen, R., Hirshman, S. P.   +4 more
core  

Accelerated Materials Discovery Through In Situ X‐ray Diffraction: Solvothermal Formation of PdxMy (M═Si, Ge, Sn, Pb) Intermetallic Nanoparticles

Advanced Materials, EarlyView.
In situ PXRD data on solvothermal reactions accelerate materials discovery while simultaneously providing fundamental insights into complex crystal formation processes. Using PdxMy (M = Si, Ge, Sn, Pb) as an example, a general formation mechanism is identified, and specific synthesis strategies for ex situ preparation of SnPd2, Sn13Pd20, and SnPd ...
Anders Bæk Borup, Bo Brummerstedt Iversen   +1 more
wiley   +1 more source

Molybdenum density scaling in Alcator C-Mod L- and I-mode plasmas

Nuclear Fusion
Parameter scalings of the core molybdenum ( Z  = 42) density have been obtained for Alcator C-Mod L- and I-mode plasmas from x-ray observations of the neon-like Mo ^32+ 4D transition.
J.E. Rice, C.J. Perks, R. Diab, N.T. Howard, J.W. Hughes, E.S. Marmar, S.J. Wukitch   +6 more
doaj   +1 more source

Reactivity‐Guided Janus Graphene With Asymmetric Interfacial Electrostatics for Tunable Charge Transport

Advanced Materials, EarlyView.
Stepwise dual‐side functionalization creates covalent Janus graphene with chemically and electrostatically asymmetric interfaces. The resulting nonadditive surface‐potential response and pronounced charge‐transport modulation demonstrate a versatile route for tailoring the electronic properties of graphene.
Shishi Liu, Zhuting Hao, Mira Kreßler, Oguzhan Yücel, Lotte Polling, Adrián Dewambrechies, Wesley Pietsch, Philip Nickl, Felix Fels, Kevin Pagel, Markus R. Heinrich, Patryk Kusch, Kirill Bolotin, Xin Chen, Siegfried Eigler   +14 more
wiley   +1 more source

Core-edge integrated modeling of ARC: on the effect of impurity transport and detachment conditions

Nuclear Fusion
Integrated modeling of the flat-top phase of ARC H-modes has been conducted to assess the feasibility of high-performance scenarios compatible with divertor detachment. The analysis incorporates self-consistent evolution of impurity radiation and density
M. Muraca, P. Rodriguez-Fernandez, N.T. Howard, J. Hall, G. Tardini, D. Silvagni, T. Body, J. Hillesheim   +7 more
doaj   +1 more source

Methanesulfonic Acid as a Dual‐Role Reagent for Porous Polymer Network Design

Advanced Materials, EarlyView.
The design of porous polymer networks (PPNs) using methanesulfonic acid (MSA) as a dual‐role reagent facilitates the synthesis of robust PPNs for specific applications. It also makes the scale‐up process techno‐economically feasible because MSA functions simultaneously as both a solvent and a catalyst for the reaction.
Kelechi Festus, Arnab Ghosh, Ankit Mondal, Theresa Ariri, Suman Mandal, Ahana Sarkar, Urme Podder, Qingsheng Wang, Hong‐Cai Zhou   +8 more
wiley   +1 more source

Impurity transport driven by kinetic ballooning mode in the strong gradient pedestal of tokamak plasmas

Nuclear Fusion
The impurity transport driven by kinetic ballooning mode (KBM) is theoretically studied in the DIII-D H-mode strong gradient pedestal plasmas. From the electromagnetic gyrokinetic equation, including the correction of the strong radial electric field ...
Shanni Huang, Weixin Guo, Lu Wang
doaj   +1 more source

Impurity injection in RFX-mod Reversed Field Pinch for impurity transport studies

, 2016
In RFX-mod RFP device, strong evidences that impurity core penetration is prevented, as the result of a strong outward impurity convection, have been found.
Auriemma F, Predebon I, Franz P, Terranova D, Carraro L, Scarin P, Fassina A   +6 more
core   +1 more source