Publications (24)
Intermittent dynamics of antiferromagnetic phase in inhomogeneous iron-based chalcogenide superconductor
A. Ricci, G. Campi, B. Joseph +9
Coexistence of phases, characterized by different electronic degrees of freedom, commonly occurs in layered superconductors. Among them, alkaline intercalated chalcogenides are mod…
Structural studies of the bond-orientational order and hexatic-smectic transition in liquid crystals of various compositions
I. A. Zaluzhnyy, R. P. Kurta, E. A. Sulyanova +9
We report on X-ray studies of freely suspended hexatic films of three different liquid crystal compounds. By applying angular X-ray cross-correlation analysis (XCCA) to the measure…
Nucleation of dislocations and their dynamics in layered oxides cathode materials during battery charging
A. Singer, S. Hy, M. Zhang +15
Defects and their interactions in crystalline solids often underpin material properties and functionality as they are decisive for stability, result in enhanced diffusion, and act…
Electronic and magnetic nano phase separation in cobaltates LaSrCoO
Z. W. Li, Y. Drees, A. Ricci +11
The single-layer perovskite cobaltates have attracted enormous attention due to the recent observation of hour-glass shaped magnetic excitation spectra which resemble the ones of t…
Direct observation of nanoscale interface phase in the superconducting chalcogenide KFeSe with intrinsic phase separation
A. Ricci, N. Poccia, B. Joseph +13
We have used scanning micro x-ray diffraction to characterize different phases in superconducting KFeSe as a function of temperature, unveiling the thermal evolut…
Interplay between atomic fluctuations and charge density waves in LaSrCuO
L. Shen, V. Esposito, N. G. Burdet +10
In the cuprate superconductors, the spatial coherence of the charge density wave (CDW) state grows rapidly below a characteristic temperature , the nature of which…
Structural Study of a Self-Assembled Gold Mesocrystal Grain by Coherent X-ray Diffraction Imaging
J. Carnis, F. Kirner, D. Lapkin +15
Mesocrystals are nanostructured materials consisting of individual nanocrystals having a preferred crystallographic orientation. On mesoscopic length scales, the properties of meso…
Surface X-ray Speckles: Coherent Surface Diffraction from Au (0 0 1)
M. S. Pierce, K. C. Chang, D. Hennessy +4
We present coherent speckled x-ray diffraction patterns obtained from a monolayer of surface atoms. We measured both the specular anti-Bragg reflection and the off-specular hexagon…
X-ray cross-correlation analysis of liquid crystal membranes in the vicinity of hexatic-smectic phase transition
R. P. Kurta, B. I. Ostrovskii, A. Singer +7
We present an x-ray study of liquid crystal membranes in the vicinity of hexatic-smectic phase transition by means of angular x-ray cross-correlation analysis (XCCA). By applying t…
Gelation dynamics upon pressure-induced liquid-liquid phase separation in a water-lysozyme solution
M. Moron, A. Al-Masoodi, C. Lovato +9
Employing X-ray photon correlation spectroscopy we measure the kinetics and dynamics of a pressure-induced liquid-liquid phase separation (LLPS) in a water-lysozyme solution. Scatt…
Direct measurement of antiferromagnetic domain fluctuations
O. G. Shpyrko, E. D. Isaacs, J. M. Logan +9
Measurements of magnetic noise emanating from ferromagnets due to domain motion were first carried out nearly 100 years ago and have underpinned much science and technology. Antife…
A Virtual Young's Double Slit Experiment for Hard X-ray Photons
A. F. Isakovic, A. Stein, J. B. Warren +7
We have implemented a virtual Young's double slit experiment for hard X-ray photons with micro-fabricated bi-prisms. We observe fringe patterns with a scintillator, and quantify in…
X-rays induced atomic dynamics in a lithium-borate glass
F. Dallari, G. Pintori, G. Baldi +4
The continuous development of synchrotron-based experimental techniques in the X-ray range provides new possibilities to probe the structure and the dynamics of bulk materials down…
Spatial properties of conjugated network in semicrystalline polymer thin films studied by intensity x-ray cross-correlation functions
R. P. Kurta, L. Grodd, E. Mikayelyan +6
We present results of x-ray study of spatial properties of conjugated networks in polymer thin films. We applied the x-ray cross-correlation analysis to x-ray scattering da…
X-ray Near Field Speckle: Implementation and Critical Analysis
Xinhui Lu, Simon GJ Mochrie, S. Narayanan +2
We have implemented the newly-introduced, coherence-based technique of x-ray near-field speckle (XNFS) at 8-ID-I at the Advanced Photon Source. In the near field regime of high-bri…
How a liquid becomes a glass both on cooling and on heating
Xinhui Lu, S. G. J. Mochrie, S. Narayanan +2
The onset of structural arrest and glass formation in a concentrated suspension of silica nanoparticles in a water-lutidine binary mixture near its consolute point is studied by ex…
Nanoscale Rigidity in Cross-Linked Micelle Networks Revealed by XPCS Nanorheology
M. Reiser, J. Hallmann, J. Möller +11
Solutions of wormlike micelles can form cross-linked networks on microscopic length scales. The unique mechanical properties of these complex fluids are driven by the interplay bet…
Inhomogeneity of charge density wave order and quenched disorder in a high Tc superconductor
G. Campi, A. Bianconi, N. Poccia +11
It has recently been established that the high temperature (high-Tc) superconducting state coexists with short-range charge-density-wave order and quenched disorder arising from do…
Automated matching of two-time X-ray photon correlation maps from protein dynamics with Cahn-Hilliard type simulations using autoencoder networks
S. Timmermann, V. Starostin, A. Girelli +10
We use machine learning methods for an automated classification of experimental XPCS two-time correlation functions from an arrested liquid-liquid phase separation of a protein sol…
Revealing three-dimensional structure of individual colloidal crystal grain by coherent x-ray diffractive imaging
A. G. Shabalin, J. -M. Meijer, R. Dronyak +12
We present results of a coherent x-ray diffractive imaging experiment performed on a single colloidal crystal grain. The full three-dimensional (3D) reciprocal space map measured b…
Versatile AFM setup combined with micro-focused X-ray beam
T. Slobodskyy, A. V. Zozulya, R. Tholapi +4
Micro-focused X-ray beams produced by third generation synchrotron sources offer new perspective of studying strains and processes at nanoscale. Atomic force microscope setup combi…
Hour-glass magnetic excitations induced by nanoscopic phase separation in cobalt oxides LaSrCoO
Y. Drees, Z. W. Li, A. Ricci +10
The magnetic excitations in the cuprate superconductors might be essential for an understanding of high-temperature superconductivity. In these cuprate superconductors the magnetic…
Three-dimensional structure of a single colloidal crystal grain studied by coherent x-ray diffraction
J. Gulden, O. M. Yefanov, A. P. Mancuso +8
A coherent x-ray diffraction experiment was performed on an isolated colloidal crystal grain at the coherence beamline P10 at PETRA III. Using azimuthal rotation scans the three-di…
Spatially resolved x-ray studies of liquid crystals with strongly developed bond-orientational order
I. A. Zaluzhnyy, R. P. Kurta, E. A. Sulyanova +7
We present an x-ray study of freely suspended hexatic films of the liquid crystal 3(10)OBC. Our results reveal spatial inhomogeneities of the bond-orientational (BO) order in the v…