Results 121 to 130 of about 906,607 (253)

Determining the Relationship Between Composition, Structure, and Device Properties of GexSe1‐x‐Based Selector‐Only Memory

Advanced Electronic Materials, EarlyView.
Composition‐dependent structural evolution in GeXSe1‐X selector‐only memory (SOM) is correlated with device switching behavior. Increasing Ge strengthens network rigidity, suppresses atomic motion, and stabilizes threshold switching, while narrowing the memory window. The revealed structure–property relationship provides a guideline for compositionally
Tien Anh Nguyen, Changdeok Han, Dipannita Ghosh, Suyong Chae, Moongyu Choi, Sanghyun Ban, Myoungsub Kim, Sangmin Yoo, Seung Hwan Lee, Sieun Chae   +9 more
wiley   +1 more source

Lorentzian Geometry and Spacetime

The aim of this thesis is to present the basics of Einstein’s theory of relativity andthe relevant differential geometry. The first chapter will cover special relativity which will introduce some of the basic ideas in Lorentzian geometry.
Blankenship, David Cordell
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Broadband Near‐Field Computational Microwave Imaging Enabled by Nonperiodic Dispersive Unit‐Cell Loading in a Passive Metasurface

Advanced Electronic Materials, EarlyView.
A compact passive engineered surface converts changes in microwave frequency into many distinct illumination patterns, allowing nearby objects to be imaged without mechanical scanning, active tuning, or a large antenna array. Operating from 18 to 28 GHz, the single‐port system uses measured field patterns to reconstruct metallic targets and distinguish
Mohammed H. Arif, Firas Slewa Dawod, Henrik Jansen, Caner Kadıoğlu, Sayan Roy, Dirk Heberling, Renato Negra   +6 more
wiley   +1 more source

Noncommutative geometry, Lorentzian structures and causality

, 2014
The theory of noncommutative geometry provides an interesting mathematical background for developing new physical models. In particular, it allows one to describe the classical Standard Model coupled to Euclidean gravity. However, noncommutative geometry
Eckstein, Michał, Franco, Nicolas, Franco, Nicolas; id_orcid   +2 more
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Mechanochemically Disordered Li2Ta2OCl10 Oxyhalide Unlocks Superionic Conductivity (>10 mS.cm−1)

Advanced Energy Materials, EarlyView.
This work presents a new crystalline oxyhalide, Li2Ta2OCl10, built from [Ta2OCl10]2− dimers. The disorder induced by ball‐milling drives the dramatic 5000‐fold increase in ionic conductivity to reach 11 mS.cm−1. The material shows promise as a solid electrolyte for batteries and opens new prospects for the discovery of new dimer‐based compounds ...
Clément Morel, Anshuman Chaupatnaik, Jie Liu, Mingxue Tang, Horyung Ji, Mouna Ben Yahia, Marie‐Liesse Doublet, Tatiana N. Kobernik, Dmitry A. Aksyonov, Artem M. Abakumov, Gwenaëlle Rousse, Jean‐Marie Tarascon   +11 more
wiley   +1 more source

Horizons that gyre and gimble: a differential characterization of null hypersurfaces

European Physical Journal C: Particles and Fields
Motivated by the thermodynamics of black hole solutions conformal to stationary solutions, we study the geometric invariant theory of null hypersurfaces.
Samuel Blitz, David McNutt
doaj   +1 more source

Lorentzian anti-de Sitter plane [PDF]

In this paper, we study a two-dimensional Lorentzian problem on the anti-de Sitter plane. Using methods of geometric control theory and differential geometry, it was possible to construct an orthonormal frame, calculate extremal trajectories, describe ...
Ali, A. Z., Sachkov, Yu. L.
core   +1 more source

Quantum fluctuations and Newton-Cartan geometry for non-relativistic de Sitter space

Journal of High Energy Physics
We study a non-relativistic realisation of two-dimensional de Sitter gravity both from its boundary and bulk description with the goal of learning about de Sitter space and paving the way for extending the holographic duality into a non-relativistic ...
Matthias Harksen, Diego Hidalgo, Watse Sybesma   +2 more
doaj   +1 more source

An elliptic proof of the splitting theorems from Lorentzian geometry

We provide a new proof of the splitting theorems from Lorentzian geometry, in which simplicity is gained by sacrificing linearity of the d\u27Alembertian to recover ellipticity. We exploit a negative homogeneity (non-uniformly) elliptic $p$-d\u27Alembert
McCann, Robert J., Gigli, Nicola, Ohanyan, Argam, Braun, Mathias, Sämann, Clemens   +4 more
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On geometry of spatial kinematics in Lorentzian space

, 2017
Turhan T. On geometry of spatial kinematics in Lorentzian space / T. Turhan, N. Ayyildiz // Algebraic and geometric methods of analysis: book of abstr. the Intern. sci. conf., Odessa, 31 May – 05 June 2017 / [Odesa Nat. Acad. of Food Technologies et al.].
Turhan, T., Ayyildiz, N.
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