Abstract Engineering semiconductor devices requires an understanding of charge carrier mobility. Typically, mobilities are estimated using Hall effect and electrical resistivity meausrements, which routinely performed at room temperature below, in materials with greater than 1 cm 2 V ‐1 s . With the availability combined Seebeck coefficient measurement systems, it is now easy to measure weighted mobility (electron by density electronic states). A simple method calculate from measurements...

A low-density, nanocrystalline high-entropy alloy, Al20Li20Mg10Sc20Ti30 was produced by mechanical alloying. It formed a single-phase fcc structure during ball milling and transformed to hcp upon annealing. The alloy has an estimated strength-to-weight ratio that is significantly higher than other alloys comparable ceramics. High hardness retained after

CrCoNi alloy exhibits a remarkable combination of strength and plastic deformation, even superior to the CrMnFeCoNi high-entropy alloy. We connect magnetic mechanical properties CrCoNi, via magnetically tunable phase transformation. While both alloys crystallize as single-phase face-centered-cubic (fcc) solid solutions, we find distinctly lower-energy in with hexagonal close-packed (hcp) structure. Comparing configurations those other equiatomic ternary derivatives confirms that frustrated...

Spin-driven ordering of Cr in an equiatomic fcc NiFeCrCo high entropy alloy (HEA) was predicted by first-principles calculations. Ordering is driven the reduction energy realized surrounding anti-ferromagnetic with ferromagnetic Ni, Fe, and Co alloyed L12 structure. The fully Cr-ordered phase to have a magnetic moment that 36% for magnetically frustrated random solid solution. Three samples were synthesized milling or casting/annealing. cast/annealed sample found low temperature 44% milled...

Abstract Normal embryo development is a complex process that requires normal sperm to fertilize oocytes. Abnormal embryogenesis can be caused by either abnormal oocytes or sperm. However, the impact of sperm‐associated factors often underappreciated. Association between defects in chromatin and poor has been consistently reported. In cells, most histones are replaced protamines remodel cell chromatin. mechanism nuclear protein replacement largely unknown. Meiosis expressed gene 1 (MEIG1)...

Material properties depend sensitively on picometer scale atomic displacements introduced by local chemical fluctuations. Direct real-space, high spatial-resolution measurements of this compositional variation and corresponding distortion can provide new insights into materials behavior at the scale. Using aberration corrected scanning transmission electron microscopy combined with advanced imaging methods, we observed atom column specific, picometer-scale induced chemistry in a complex...

The equation of motion for nonequilibrium Green functions is derived within the framework Schwinger and Keldysh formalism perturbation expansion. For distribution functions, from quantum mechanics contains undefined singularities, whose explicit form depends on specific initial or boundary condition. In present work, exact expression singular terms found in time-looped theory which adiabatic condition implied. Unlike usual Dyson well known Kadanoff-Baym motion, our resulting can be adopted...

The band gap in photonic materials with periodic spatial modulation of refractive index greater than unity can actually be regarded as a potential barrier for photons. Similar to semiconductor quantum well systems due the electronic band-gap mismatch, constructed by sandwiching uniform medium between two barriers. transmission and reflection coefficients light through are calculated modal expansion method an R-matrix propagation algorithm. Resonance tunneling structure is observed varying...

Abstract We propose a Multi-Cell Monte Carlo algorithm, or (MC) $${}^{2}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:math> , for predicting stable phases in chemically complex crystalline systems. This algorithm takes advantage of multiple cells to represent possible phases, while eliminating the size and concentration restrictions previous counterparts. Free atomic transfer among is achieved via...

The photon-assisted coherent tunneling is treated by the equation of motion for nonequilibrium Green functions. effects intersubband transitions on through a two-level quantum wire are investigated under different conditions calculating off-diagonal matrix elements electron-photon interaction in addition to diagonal elements. differences density states and current examined. It found that electronic due multiphoton absorption more or less suppressed when dominates, while both multi-...

Electron-occupation probabilities during the photon-assisted coherent tunneling through a quantum wire between electrodes are investigated by means of equation motion for nonequilibrium Green functions. The is numerically solved renormalization-group method. Due to intersubband transitions from off-diagonal matrix elements, electron population inversion appears in general wide range photon frequency, revealing different mechanism optical pumping. It also found that rotating-wave...

We investigate cosmological vacuum amplification of gravitational waves in dynamical Chern-Simons gravity. develop a comprehensive framework to compute graviton production induced by the parity violating Pontryagin coupling and study its imprint on stochastic wave background energy power spectrum. explore four concrete scenarios for evolution pseudoscalar. show that parity-violating contribution dominates over an initially flat spectrum when velocity pseudoscalar quickly interpolates between...

High-Entropy Alloys (HEAs) exhibit complex atomic interactions, with short-range order (SRO) playing a critical role in determining their properties. Traditional methods, such as Monte Carlo (MC) and hybrid MC-Molecular Dynamics (MC-MD), are often constrained by system size computational inefficiency, limiting applicability for large-scale modeling. We introduce PyHEA, high-performance Python package C++ core, designed to efficiently model HEAs through combination of global local search...

Journal Article STEM Characterization of the Deformation Substructure a NiCoCr Equiatomic Solid Solution Alloy Get access J Miao, Miao Center for Electron Microscopy and Analysis, The Ohio State University, Columbus, OH, USADepartment Materials Science Engineering, USA Search other works by this author on: Oxford Academic Google Scholar CE Slone, Slone TM Smith, Smith C Niu, Niu Department H Bei, Bei Technology Division, Oak Ridge National Laboratory, Ridge, TN M Ghazisaeidi, Ghazisaeidi GM...

We propose a Multi-Cell Monte Carlo algorithm, or (MC)^2, for predicting stable phases in chemically complex crystalline systems. Free atomic transfer among cells is achieved via the application of lever rule, where an assigned molar ratio virtually controls percentage each cell overall simulation, making (MC)^2 first successful algorithm simulating phase coexistence solids. During this method, all energies are computed direct Density Functional Theory calculations. test method by prediction...

Local atomic scale ordering and structural distortions can significantly modify material properties.Aberration correction dramatically improves spatial resolution into the sub-Ångstrøm regime, unlocking information about defects previously beyond reach.While STEM has proven essential to characterization of materials, for example at defects, interfaces, or even in perfect crystals, measurement displacements distances remained challenging due presence sample drift.Distortion proportional rate...