cond-mat.mtrl-sci

Persistent Interfacial Topological Hall Effect Demonstrating Electrical Readout of Topological Spin Structures in Insulators

The researchers introduce the interfacial topological Hall effect (ITHE), a method that enables the electrical detection of robust, noncoplanar spin textures in insulating magnets by imprinting them onto an adjacent heavy metal via the magnetic proximity effect.

Variational and field-theoretical approach to exciton-exciton interactions and biexcitons in semiconductors

This paper develops a variational and field-theoretical framework to describe exciton-exciton interactions by deriving an effective, spin-dependent potential that generalizes the Heitler-London model and provides a many-body path-integral formalism for dilute excitonic gases.

Integration of imprint-free and low coercivity ferroelectric BaTiO3 thin films on silicon

This study demonstrates the successful growth of high-quality, single-crystalline BaTiO3 thin films on silicon using a SrSn1-xTixO3 buffer layer to alleviate thermal strain and stabilize polarization, resulting in imprint-free, low-coercivity ferroelectric devices with superior endurance for non-volatile memory applications.

High-throughput, Non-Destructive, Three-Dimensional Imaging of GaN Threading Dislocations with in-Plane Burgers Vector Component via Phase-Contrast Microscopy

This paper demonstrates a high-throughput, non-destructive phase-contrast microscopy (PCM) technique capable of three-dimensionally imaging threading dislocations and other defects in GaN by analyzing contrast shapes and focal plane shifts.

Laser-generated GHz surface acoustic waves with tunable amplitude during the magnetostructural phase transition in FeRh thin films

This study demonstrates that laser-induced magnetostructural phase transitions in FeRh thin films enable the tunable generation of GHz surface acoustic waves, where the amplitude is controlled by the lattice expansion associated with the transition and can be switched off above the critical temperature.

Cascade of Spin Moiré Superlattices with In-Plane Field in Triangle Lattice Semimetal EuAg$_4$Sb$_2$

Halide diffusion in mixed-halide perovskites and heterojunctions

How Electrons Become Mobile in a Colossal Dielectric -- Fe$_2$TiO$_5$

By demonstrating that the activation energies for both dielectric relaxation and DC transport are nearly identical, this study suggests that the colossal permittivity in $\text{Fe}_2\text{TiO}_5$ is a bulk phenomenon driven by the same microscopic forces that govern charge mobility in a system nearing metallicity.

Carrier scattering considerations and thermoelectric power factors of half-Heuslers

This study uses Boltzmann transport theory to demonstrate that Coulombic scattering mechanisms—specifically ionized impurity scattering and polar optical phonon scattering—are the dominant factors determining the thermoelectric power factors of n-type and p-type half-Heusler alloys.

Spin-polarized Energy Density Method from Spin-Density Functional Theory

This paper introduces a generalized spin-polarized energy density method derived from spin-density functional theory that decomposes total energy into uniquely defined atomic energies, providing a new tool for analyzing magnetic systems through numerical implementations in the VASP code.