Nickelates: A Stabilized Superconducting State Without Doping
a) HAADF-STEM image of a SrTiO₃–capped PrNiO₂ film . b) 4D-STEM divergence-COM analysis showing clean infinite-layer phase without the presence of any apical oxygen. c) Real-space evolution of the O-K edge EELS fine structure. Cuprates, copper-based oxides, are renowned for ...
Band engineering in 2D superlattices with rotation-symmetry-mismatched interfaces
Two-dimensional (2D) moiré superlattices, formed by stacking individual layers such as 2H transition metal dichalcogenides (TMDs) with accurately twisted angles, have garnered significant attention due to their potential to host phenomena due to strong electron correlations, including unconventional superconductivity, moiré ...
Ultrafast carrier dynamics in GeAs
The paper on “Direct observation of electronic band gap and hot carrier dynamics in GeAs” has been published in Appl. Phys. Lett. 125, 182106 (2024) ...
Ingap states in hexagonal diamond silicon
The study of "Acceptor and donor impurity levels in hexagonal-diamond silicon" appeared in Phys. Rev. Materials 8, 114601 (2024). The effect of p- and n-type substitutional doping on the structural and electronic properties of hexagonal-diamond Si (2H-Si) has been studied ...
New insight into charge transfer in h-BN
The charge density distribution, which fully defines the ground-state properties of a material system, can be accurately measured in single crystals using X-ray diffraction. However, there is still a lack of experimental techniques capable of measuring charge density redistribution in ...
Ultrafast VUV source at 11 eV
The paper on a new "Pulsewidth-switchable ultrafast source at 114 nm" has been published in Optics Letters 48, 4625 (2023) ...
Anahita Omoumi’s PhD
Anahita Omoumi defended her PhD thesis on December 15th, 2023. Congratulations, Anahita! ...
Dirac state manipulation by surface charge doping
In a paper published in Nano Letters , we show how chemisorption of potassium on BaNiS2 can tune Dirac bands in reciprocal space at the surface (J. Zhang, T. Sohier, M. Casula, et al. ) ...
Topological insulators under ultrafast light
The electronic structure of prototype topological insulators has been studied with ultrafast ARPES, using the ARTOF spectrometer in combination with the femtosecond laser source at the LPS. Using time-resolved multi-dimensional Angle-Resolved Photoelectron Spectroscopy (ARPES) we explore the angular momentum transfer ...
