371 citations · 758 across the 11 of their papers we have counts for
14 papers
Complex materials engineering via Provenance Action Graphs: potential, structure and demonstration
Yevgeny Rakita, Paul Todd, James R. Neilson +1
This work discusses and tests the potential of reaction graphs for material synthesis, in which events consist of reaction steps (actions) and their outputs (observations). The imp…
Join Order Enumeration and Optimization for Double-Star and Helix Join Graphs
Ansh Taneja, Ryan Marcus
Join ordering is classic problem in data management. We highlight the connection between structure-specific dynamic programming algorithms and the mathematical enumeration of the p…
Dynamic Chemical Changes of Ti3C2Tx MXenes in Halide Perovskite Precursor Environments
Kirill Sobolev, Nagaprasad Reddy Samala, Mariela J. Pavan +8
The integration of two-dimensional Ti3C2Tx MXenes into Halide Perovskite (HaP) optoelectronics has shown immense potential for enhancing device performance, yet the fundamental che…
Protocol for Clustering 4DSTEM Data for Phase Differentiation in Glasses
Mridul Kumar, Yevgeny Rakita
Phase-change materials (PCMs) such as Ge-Sb-Te alloys are widely used in non-volatile memory applications due to their rapid and reversible switching between amorphous and crystall…
Prediction of EDS Maps from 4DSTEM Diffraction Patterns Using Convolutional Neural Networks
Mridul Kumar, Yevgeny Rakita
Understanding the relationship between atomic structure (order) and chemical composition (chemistry) is critical for advancing materials science, yet traditional spectroscopic tech…
Stretched Non-negative Matrix Factorization
Ran Gu, Yevgeny Rakita, Ling Lan +9
An algorithm is described and tested that carries out a non negative matrix factorization (NMF) ignoring any stretching of the signal along the axis of the independent variable. Th…
Mapping Structural Heterogeneity at the Nanoscale with Scanning Nano-structure Electron Microscopy (SNEM)
Yevgeny Rakita, James L. Hart, Partha Pratim Das +6
Here we explore the use of scanning electron diffraction coupled with electron atomic pair distribution function analysis (ePDF) to understand the local order as a function of posi…
The pursuit of stability in halide perovskites: the monovalent cation and the key for surface and bulk self-repair
D R Ceratti, A V Cohen, R Tenne +12
We find significant differences between degradation and healing at the surface or in the bulk for each of the different APbBr3 single crystals (A=CH3NH3+, methylammonium (MA); HC(N…
The tetragonal phase of CHNHPbI is strongly anharmonic
Rituraj Sharma, Zhenbang Dai, Lingyuan Gao +7
Halide perovskite (HP) semiconductors exhibit unique strong coupling between the electronic and structural dynamics. The high-temperature cubic phase of HPs is known to be entropic…
Halide perovskites under polarized light: Vibrational symmetry analysis using polarized Raman
Rituraj Sharma, Matan Menahem, Zhenbang Dai +9
In the last decade, hybrid organic-inorganic halide perovskites have emerged as a new type of semiconductor for photovoltaics and other optoelectronic applications. Unlike standard…
Type and Degree of Covalence: Empirical Derivation and Implications
Yevgeny Rakita, Thomas Kirchartz, Gary Hodes +1
The way atoms attach to each other defines the function(s), e.g., mechanical, optical, electronic, of a given material. The nature of the chemical bond is, therefore, one of the mo…
Between Structure and Performance in Halide Perovskites for Photovoltaic Applications: the Role of Defects
Yevgeny Rakita, David Cahen, Gary Hodes
My study is about Halide Perovskites (HaPs) and focuses the fundamental structural, chemical and dielectric properties of HaPs in reference to their PV-related properties. * I pres…
Tetragonal CH3NH3PbI3 Is Ferroelectric
Yevgeny Rakita, Omri Bar-Elli, Elena Meirzadeh +7
Halide perovskite (HaP) semiconductors are revolutionizing photovoltaic (PV) solar energy conversion by showing remarkable performance of solar cells made with esp. tetragonal meth…
Mechanical Properties of APbX3 (A=Cs or CH3NH3; X=I or Br) Perovskite Single Crystals
Yevgeny Rakita, Sidney R. Cohen, Nir Klein Kedem +2
The remarkable optoelectronic, and especially photovoltaic performance of hybrid-organic-inorganic perovskite (HOIP) materials drives efforts to connect materials properties to thi…