A strained Ge quantum well, grown on a SiGe/Si virtual substrate and hosting two electrostatically defined hole spin qubits, is nondestructively investigated by synchrotron-based scanning X-ray diffraction microscopy to determine all its Bravais lattice parameters. This allows rendering the three-dimensional spatial dependence of six strain tensor components with lateral resolution approximately 50 nm. Two different scales governing field fluctuations in proximity qubits are observed at <100...

The combination of strain and electrostatic engineering in epitaxial heterostructures ferroelectric oxides offers many possibilities for inducing new phases, complex polar topologies, enhanced electrical properties. However, the dominant effect substrate clamping can also limit electromechanical response often leaves electrostatics to play a secondary role. Releasing mechanical constraint imposed by not only dramatically alter balance between elastic forces, enabling them compete on par with...

Abstract Lithiation dynamics and phase transition mechanisms in most battery cathode materials remain poorly understood, because of the challenge differentiating inter- intra-particle heterogeneity. In this work, structural evolution inside Li 1− x Mn 1.5 Ni 0.5 O 4 single crystals during electrochemical delithiation is directly resolved with operando X-ray nanodiffraction microscopy. Metastable domains solid-solution intermediates do not appear associated reaction front between lithiated...

Nanoscale strain networks are reported in $\mathrm{BaTi}{\mathrm{O}}_{3}$ (BTO) crystals of 300 nm size using Bragg coherent diffractive imaging. BTO nanocrystals with clear facets were chosen to identify the crystallographic directions, allowing field direction and periodicity be studied detail. Stripes observed, which both stable preserved tetragonal cubic phases at elevated temperatures, above tetragonal-to-cubic phase transition. A finite element analysis approach was used simulate...

Abstract The nanoscale mechanisms of ion deintercalation in battery cathode materials remain poorly understood, especially the relationship between crystallographic defects (dislocations, small angle grain boundaries, vacancies, etc ), device performance, and durability. In this work, operando scanning X‐ray diffraction microscopy (SXDM) multi‐crystal (MCXD) are used to investigate microstrain lattice tilt inhomogeneities inside Li 1 − x Ni 0.5 Mn 1.5 O 4 particles during electrochemical...

Abstract Achieving substantial electrostrain alongside a large effective piezoelectric strain coefficient ( d 33 *) in materials remains formidable challenge for advanced actuator applications. Here, straightforward approach to enhance these properties by strategically designing the domain structure and controlling switching through introduction of arrays ordered {100}&lt;100&gt; dislocations is proposed. This dislocation engineering yields an intrinsic lock‐in steady–state 0.69% at low...

We study the complex ferroelastic/ferroelectric domain structure in prototypical ferroelectric PbTiO3 epitaxially strained on (110)o-oriented DyScO3 substrates, using a combination of atomic force microscopy, laboratory and synchrotron x-ray diffraction, high resolution scanning transmission electron microscopy. observe that anisotropic strain imposed by orthorhombic substrate creates large asymmetry configuration, with walls macroscopically aligned along one two in-plane directions. show...

Ferroelectric domains in PbTiO_{3}/SrTiO_{3} superlattices are studied using synchrotron x-ray diffraction. Macroscopic measurements reveal a change the preferential domain wall orientation from {100} to {110} crystallographic planes with increasing temperature. The temperature range of this reorientation depends on ferroelectric layer thickness and period. Using nanofocused beam, local changes within buried layers imaged, both structurally uniform regions sample near defect sites argon...

Surface acoustic waves at frequencies beyond a few GHz are promising components for quantum technology applications. Applying scanning x-ray diffraction microscopy we directly map with high lateral spatial resolution the complete strain field generated near $\mathrm{Ga}\mathrm{As}$ surface by standing wave wavelength $\ensuremath{\lambda}\ensuremath{\simeq}500$ nm corresponding to 6 GHz. We find that lattice distortions perpendicular phase shifted compared those in propagation direction....

Li-ion battery cathode active materials obtained from different sources or preparation methods often exhibit broadly divergent performance and stability despite no obvious differences in morphology, purity, crystallinity. We show how state-of-the-art, commercial, nominally single crystalline LiNi0.6Mn0.2Co0.2O2 (NMC-622) particles possess extensive internal nanostructure even the pristine state. Scanning X-ray diffraction microscopy reveals presence of interlayer strain gradients, crystal...

The necessity of mapping crystal defects in battery materials after synthesis is crucial understanding heterogeneity within a single domain and among particles to develop superior quality materials. Numerous imaging techniques have been developed over the past years study these at nanoscale. However, most them use electron beams which demand many hours sample preparation, they are incompatible with investigation batteries under realistic working conditions. Techniques such as Scanning X-ray...

Abstract Lattice strain in crystals can be exploited to effectively tune their physical properties. In microscopic structures, experimental access the full tensor with spatial resolution at (sub‐)micrometer scale is same time very interesting and challenging. this work, how scanning X‐ray diffraction microscopy, an emerging model‐free method based on synchrotron radiation, shed light complex, anisotropic deformation landscape within three dimensional (3D) microstructures shown. This...

The observation of unexpected polarization textures such as vortices, skyrmions, and merons in various oxide heterostructures has challenged the widely accepted picture ferroelectric domain walls being Ising-like. Bloch components 180° <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mrow><a:mi>PbTiO</a:mi></a:mrow><a:mn>3</a:mn></a:msub></a:mrow></a:math> have recently been reported <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...

Many solids, particularly low-dimensional systems, exhibit charge density waves (CDWs). In one dimension, are well understood, but in two dimensions, their structure and origin difficult to reveal. Herein, the 2D charge-density-wave atomic stabilization mechanism bromide-bridged Pd compound [Pd(cptn)2 Br]Br2 (cptn=1R,2R-diaminocyclopentane) is investigated by means of single-crystal X-ray diffraction employing 3D-Δpair distribution function (3D-ΔPDF) method. Analysis diffuse scattering using...

The influence of edge-type threading dislocations (TDs) on the epitaxial growth AlGaN native AlN substrates was investigated theoretically and experimentally. In step flow regime, we find that pure TDs cause a pinning surface steps, resulting in curved segments. Theoretical calculations reveal this mechanism is solely mediated by altered potential due strain field imposed TD. Within segment, width subject to changes an Ga/Al incorporation rate. According density functional theory...

Metal halide perovskites exhibit a rich crystal structure, with multiple phases as well ferroelastic domains, which is crucial for the optical and electrical properties. The average phase-transition temperatures can be shifted by size, strain, or defects, but it not clear whether such differences also appear locally within single crystal. experimental study of domain dynamics nanocrystals challenging requires method capable probing lattice variations both high spatial temporal resolution....

Li-ion battery cathode active materials obtained from different sources or preparation methods often exhibit broadly divergent performance and stability, despite no obvious differences in morphology, purity, crystallinity. We show how state-of-theart, commercial, nominally single crystalline LiNi0.6Mn0.2Co0.2O2 (NMC-622) particles possess extensive internal nanostructure even the pristine state. Scanning X-ray diffraction microscopy reveals presence of interlayer strain gradients crystal...

Germanium–tin (GeSn) microdisks are promising structures for complementary metal–oxide–semiconductor‐compatible lasing. Their emission properties depend on Sn concentration, strain, and operating temperature. Critically, the band structure of alloy varies along disk due to different lattice deformations associated with mechanical constraints. An experimental numerical study Ge 1− x microdisk concentration between 8.5 14 at% is reported. Combining finite element method calculations,...

Bragg coherent X-ray diffraction is a nondestructive method for probing material structure in three dimensions at the nanoscale, with unprecedented resolution displacement and strain fields. This work presents Gwaihir , user-friendly open-source tool to process analyze data. It integrates functionalities of existing packages bcdi PyNX same toolbox, creating natural workflow promoting data reproducibility. Its graphical interface, based on Jupyter Notebook widgets, combines an interactive...

Germanium–Tin Microdisks Germanium–tin microdisks are promising structures for CMOS-compatible lasing. Their emission properties depend on Sn concentration, strain, and operating temperature. Critically, the band structure of alloy varies along disk due to different lattice deformation. In article number 2300348, Ignatii Zaitsev, Agnieszka Anna Corley-Wiciak, Costanza Lucia Manganelli co-workers study mechanical optical germanium–tin by finite element simulations experimentally...

The observation of unexpected polarisation textures such as vortices, skyrmions and merons in various oxide heterostructures has challenged the widely accepted picture ferroelectric domain walls being Ising-like. Bloch components 180{\deg} PbTiO3 have recently been reported PbTiO3/SrTiO3 superlattices linked to wall chirality. While this opens exciting perspectives, ubiquitous nature component remains be further explored. In work, we present a comprehensive investigation superlattices,...

Abstract Antiferroelectric oxides are promising materials for applications in high‐density energy storage, solid‐state cooling, and negative capacitance devices. However, the range of oxide antiferroelectrics available today is rather limited. In this work, it demonstrated that antiferroelectric properties can be electrostatically engineered artificially layered ferroelectric superlattices. Using a combination synchrotron X‐ray nanodiffraction, scanning transmission electron microscopy,...

Experimental assessment of the strain tensor within a microstructure is challenging, especially for small mechanical deformations acting over submicron length scales. In this work, we fully characterize spatial distribution suspended micro-disk laser made Ge1-xSnx alloy, with fine resolution &lt;200 nm. We employ Scanning X-ray Diffraction Microscopy, model-free method based on synchrotron radiation, to directly obtain maps all components lattice and rotation, including shear strains,...