Crossover from BKT-Rough to KPZ-Rough Surfaces for Crystal Growth/Recession

We found a crossover from a Berezinskii-Kosterlitz-Thouless (BKT, logarithmic-rough surface to a Kardar-Parisi-Zhang (KPZ, algebraic)-rough surface for growing/recessing vicinal crystal surfaces in the non-equilibrium steady state using the Monte-Carlo method. We also found that the crossover point from a BKT-rough surface to a KPZ-rough surface is different from the kinetic roughening point for the (001) surface. Multilevel islands and negative islands (island-shaped holes) on the terrace formed by the two-dimensional nucleation process are found to block surface fluctuations, which contributes to making a BKT-rough surface.

Magnetic Properties and Kinetic Roughening Study of Prepared Polyaniline- Lead Ferrite, Cobalt Ferrite and Nickel Ferrite Nanocomposites Electrodeposited Thin Films

The purpose of this study was to prepare polyaniline-lead ferrite, polyaniline-cobalt ferrite and polyaniline / nickel ferrite thin layers. The preparation process consists of two steps: First, ferrites are synthesized using a microwave irradiated hydrothermal method. The ferrites were then added separately to 0.1 M aniline electrolyte solution and 0.2 M sulfuric acid. The accumulation of polyaniline and ferrite composites was carried out in an electrochemical cell by electrodeposition method. The surface morphology of the composite layers was investigated by scanning electron microscopy and the percentage of the constituents was studied by X-ray energy scattering (EDX) analysis. Also, surface roughness analysis and kinetic roughening of thin films was performed using atomic force microscopy (AFM). Hysteresis loop of magnetic samples were investigated by vibrating sample magnetometer (VSM). The structure and crystalline size of samples studied by X-ray diffraction analyze.

Kinetic roughening in active interfaces

The essential features of many interfaces driven out of equilibrium are described by the same equation—the Kardar-Parisi-Zhang (KPZ) equation. How do living interfaces, such as the cell membrane, fit into this picture? In an endeavour to answer such a question, we proposed in [F. Cagnetta, M. R. Evans, D. Marenduzzo, PRL 120, 258001 (2018)] an idealised model for the membrane of a moving cell. Here we discuss how the addition of simple ingredients inspired by the dynamics of the membrane of moving cells affects common kinetic roughening theories such as the KPZ and Edwards-Wilkinson equations.