Materials Literature
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Abstract The rapid growth of data processing is driving an urgent need for high-speed, low-power transceivers to support compute and interconnect demands. Here, we demonstrate a monolithically integrated O-band Ge/SiGe quantum-confined Stark effect (QCSE) photodetector seamlessly integrated with silicon nitride (SiN)…
Let D={1,2,8/3,3,11/3,4}, the set of squared distances realised between two points of one twelve-neighbour shell of a Barlow (close-packed) structure. Call a twelve-point subset of the unit sphere distance-spectral if all of its pairwise squared distances lie in D. We prove that such twelve-point sets form exactly two…
Let D={1,2,8/3,3,11/3,4}, the set of squared distances realised between two points of one twelve-neighbour shell of a Barlow (close-packed) structure. Call a twelve-point subset of the unit sphere distance-spectral if all of its pairwise squared distances lie in D. We prove that such twelve-point sets form exactly two…
A formally complete bounded representational space may contain every candidate expression permitted by a specified encoding, but explicit enumeration of such a space rapidly becomes computationally infeasible. This paper examines the computational and technological requirements for turning representational scientific…
A matter-wave visibility floor becomes physics only when a frozen source certificate produces a surviving experimental shape. The paper inserts the A7U source factor into the ordinary Talbot-Lau transport rather than replacing environmental decoherence: \[ B_n^{\rm QTT}(v) = B_n^{\rm QM/env}(v)F_n^{\rm A7U}(v), \qquad…
"The Bank does not enforce perfect symmetry; it enforces exact governance with deliberately bounded asymmetry, because only that regime keeps the machine alive." The Fulcrum, the Receipt, and the Left Hand Unified abstract for the three-note sequence Sequence: After the Three Locks: The Needle, the Stamp, and the Quie…
Counting lattice points inside a ball of large radius in Euclidean space is a classical problem in analytic number theory, dating back to Gauss. We propose a variation on this problem: studying the asymptotics of the measure of an integer lattice of affine planes inside a ball. The first term is the volume of the ball…
The evaluation of the electrostatic potential is fundamental to the study of condensed phase systems. We discuss the calculation of the relevant lattice summations by Ewald-type techniques. A model charge density is introduced, that cancels multipole moments of the crystalline charge distribution up to a desired order…
The dynamic magnetic pair-density function (DymPDF) $D_{\rm M}(r, E)$ is obtained via the Fourier transform of the dynamic magnetic structure factor, $S_{\rm M}(Q, E)$, which is measured using nonpolarized inelastic neutron scattering. While there is a long history of magnetic excitation studies with $S_{\rm M}(Q, E)$…
Odd-parity magnetism represents an intriguing frontier in unconventional magnets; however, its realization has traditionally relied on noncollinear magnetic orders accompanied by broken spin conservation, which inevitably causes spin relaxation and dissipative transport of spin-encoded information. Here, we uncover a…
The location of the hydrogen-helium (H/He) immiscibility boundary controls whether and where helium rain occurs in giant planets, yet it remains uncertain because high-pressure experiments are challenging and ab initio simulations are limited in system size and simulation time. We map this boundary by computing compos…
Natural van der Waals (vdW) crystals with hyperbolic dispersion challenge artificial metamaterials but remain confined to the mid-infrared. The emergence of MoOCl2, a quasi-one-dimensional metal with in-plane hyperbolicity, overcomes this spectral limit, shifting the focus to the practical visible range. Here, using a…
The kagome $R$Mn$_6$Sn$_6$ material family has attracted significant attention as high-temperature metallic magnets with a host of different magnetic orderings and anisotropy. Theoretical studies point to the rare-earth ($R$) as the determining factor for both the direction of magnetic anisotropy and the type of magne…
Multilevel non-volatile memory technologies face recurring trade-offs among information density, endurance, retention, and switching energy. We investigate an alternative state variable based on the discrete vortex configuration of self-organized vortices in a boundary-driven electron fluid. A dissipative point-vortex…
Quantitative charge-transport modelling in crystalline pi-conjugated polymers requires an electronic representation that captures extended conjugation and material-specific electron-phonon interactions on equal footing. We present a Wannier-orbital-based formulation of the transient-polaron-localization (TPL) framewor…
The application of density functional theory to heterogeneous catalysis is hindered by the shortcomings of conventional density functional approximations. We combine machine learning with explicitly non-local physically informed descriptors and introduce an exchange-correlation functional (CIDER26SS) framework regular…
We develop a method for analyzing grain boundary (GB) microstructures that identifies distinct interfacial phases and the dislocation line defects separating them. Similar to bulk materials, GBs can adopt multiple distinct interfacial phases and undergo first-order phase transitions. When these phases coexist, their s…
Transition metal dichalcogenide monolayers are promising materials for electronic and photonic applications, yet the performance of chemical vapour deposition grown films is severely limited by native sulphur vacancies that introduce mid-gap trap states, degrade carrier mobility, and elevate electrical noise. Here we…
Predicting mobile-ion self-diffusivity $D^*$ from molecular dynamics (MD) simulations is essential for identifying promising solid-state electrolytes, but directly simulating ion diffusion is computationally expensive, particularly with high-accuracy machine learning interatomic potentials (MLIPs). Diffusion is a slow…
All-optical tuning of van der Waals heterostructures with coherent radiation offers a promising path toward ultrafast memory and optoelectronic devices. In the first-principles framework of real-time time-dependent density functional theory, we predict the induction of a persistent, long-lived out-of-plane polarizatio…