Nature Search

Size and mechanics effects in surface-induced melting of nanoparticles

Melting-related phenomena are of fundamental and applied interest, but the melting theory is poorly understood. Levitas and Samani develop an advanced phase-field theory of melting coupled to mechanics that resolves existing contradictions and reveals the features of melting phenomena.

Valery I Levitas
Kamran Samani
Research19 Apr 2011
Nature Communications

Volume: 2, P: 1-6
Pressure Self-focusing Effect and Novel Methods for Increasing the Maximum Pressure in Traditional and Rotational Diamond Anvil Cells

Biao Feng
Valery I. Levitas
ResearchOpen Access21 Apr 2017
Scientific Reports

Volume: 7, P: 1-10
Tensorial stress-plastic strain fields in α - ω Zr mixture, transformation kinetics, and friction in diamond-anvil cell

Fields of stress and plastic strain tensors in a sample under high pressures in diamond-anvil cells are important, but measuring them is difficult. Here, the authors suggest a coupled experimental-analytical-computational approach to measure them before, during, and after α−ω transformation in Zr.

Valery I. Levitas
Achyut Dhar
K. K. Pandey
ResearchOpen Access23 Sept 2023
Nature Communications

Volume: 14, P: 1-9
Unusual plastic strain-induced phase transformation phenomena in silicon

The authors report an in-situ x-ray diffraction study of pressure and strain-induced phase transformations in silicon, an essential electronic material. They observe several different plastic strain-induced transformation phenomena which may inspire practical applications.

Sorb Yesudhas
Valery I. Levitas
Jesse S. Smith
ResearchOpen Access15 Aug 2024
Nature Communications

Volume: 15, P: 1-13
Nontrivial nanostructure, stress relaxation mechanisms, and crystallography for pressure-induced Si-I → Si-II phase transformation

Crystallographic theory suggests austenite-twinned martensite interfaces at specific orientations, but this is not the case for Si-I → Si-II phase transformation. Here the authors show the classically forbidden microstructure by combined experiments, simulations and crystallographic theory.

Hao Chen
Valery I. Levitas
Nenad Velisavljevic
ResearchOpen Access21 Feb 2022
Nature Communications

Volume: 13, P: 1-6
Anisotropic Compositional Expansion and Chemical Potential for Amorphous Lithiated Silicon under Stress Tensor

Valery I. Levitas
Hamed Attariani
ResearchOpen Access08 Apr 2013
Scientific Reports

Volume: 3, P: 1-5
Resolving puzzles of the phase-transformation-based mechanism of the strong deep-focus earthquake

The developed theory for coupled deformation, plastic strain-induced phase transformation, transformation-induced plasticity, and self-blown-up deformation-transformation-heating in shear band explains the main puzzles of deep-focus earthquakes.

Valery I. Levitas
ResearchOpen Access22 Oct 2022
Nature Communications

Volume: 13, P: 1-10
Pre-Stressing Micron-Scale Aluminum Core-Shell Particles to Improve Reactivity

Valery I. Levitas
Jena McCollum
Michelle Pantoya
ResearchOpen Access19 Jan 2015
Scientific Reports

Volume: 5, P: 1-6
Quantitative kinetic rules for plastic strain-induced α - ω phase transformation in Zr under high pressure

Achyut Dhar
Valery I. Levitas
Nenad Velisavljevic
ResearchOpen Access19 Dec 2024
npj Computational Materials

Volume: 10, P: 1-13
Virtual melting and cyclic transformations between amorphous Si, Si I, and Si IV in a shear band at room temperature

Hao Chen
Valery I. Levitas
ResearchOpen Access03 Mar 2025
npj Computational Materials

Volume: 11, P: 1-10
Fifth-degree elastic energy for predictive continuum stress–strain relations and elastic instabilities under large strain and complex loading in silicon

Hao Chen
Nikolai A. Zarkevich
Xiancheng Zhang
ResearchOpen Access04 Aug 2020
npj Computational Materials

Volume: 6, P: 1-8
Tensorial stress−strain fields and large elastoplasticity as well as friction in diamond anvil cell up to 400 GPa

Valery I. Levitas
Mehdi Kamrani
Biao Feng
ResearchOpen Access01 Oct 2019
npj Computational Materials

Volume: 5, P: 1-11

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