Structural motifs and bonding in two families of boron structures predicted at megabar pressures
- Materials Science
The complex crystal chemistry of elemental boron has led to numerous proposed structures with distinctive motifs as well as contradictory findings. Herein, evolutionary structure searches performed…
Nature of the bonded-to-atomic transition in liquid silica to TPa pressures
- PhysicsJournal of Applied Physics
Shuai Zhang, ∗ Miguel A. Morales, 3 Raymond Jeanloz, Marius Millot, S. X. Hu, and Eva Zurek Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA Center for…
SHOWING 1-10 OF 50 REFERENCES
Amorphization and a Polymorphic Transformation of Boron Stimulated by High Dynamic Pressures
- Materials ScienceJETP Letters
Structural transformations of polycrystalline boron have been studied under megabar multiple-shock compression. Shock-wave experiments on the compression and subsequent recovery of polycrystalline…
Femtosecond diffraction studies of solid and liquid phase changes in shock-compressed bismuth
- PhysicsScientific Reports
It is shown that shocked-Bi exhibits a marked departure from equilibrium behavior - the incommensurate Bi-III phase is not observed, but rather a new metastable phase, and the Bi-V phase is formed at significantly lower pressures compared to static compression studies.
Electrical conductivity and equations of states of β-rhombohedral boron in the megabar dynamic pressure range
- Materials Science
The pressure dependence of the conductivity of boron under conditions of a stepwise shock compression of megabaric range is studied. With this purpose, the following problems have been solved. The…
Structure measurements of compressed liquid boron at megabar pressures
We report on the first measurements of the structure of compressed liquid boron, as it crosses the melt line in dynamic shock-compression experiments at a pressure of 100 GPa. Temporally, spectrally…
Theoretical and experimental investigation of the equation of state of boron plasmas.
- PhysicsPhysical review. E
The self-diffusivity and the effect of thermal and pressure-driven ionization on the EOS and shock compression behavior in high-pressure and -temperature conditions are investigated and the sensitivity of a polar direct-drive exploding pusher platform to pressure variations is studied.
Equilibrium p-T Phase Diagram of Boron: Experimental Study and Thermodynamic Analysis
- Chemistry, Materials ScienceScientific reports
The proposed phase diagram explains all thermodynamic aspects of boron allotropy and significantly improves the understanding of the fifth element.
Equation of state and pressure induced amorphization of beta-boron from X-ray measurements up to 100 GPa.
- Materials SciencePhysical review letters
The equation of state of boron has been measured up to 100 GPa by single-crystal x-ray diffraction with helium as the pressure transmitting medium and a pressure-induced amorphization is observed.
Phase transition lowering in dynamically compressed silicon
- PhysicsNature Physics
Silicon, being one of the most abundant elements in nature, attracts wide-ranging scientific and technological interest. Specifically, in its elemental form, crystals of remarkable purity can be…
Experimental pressure-temperature phase diagram of boron: resolving the long-standing enigma
- Materials Science, PhysicsScientific reports
In a series of high pressure high temperature experiments, single crystals of the three boron phases are synthesised and provided evidence of higher thermodynamic stability of α-B, which opens a way for reproducible synthesis ofα-boron, an optically transparent direct band gap semiconductor with very high hardness, thermal and chemical stability.
Nonicosahedral boron allotrope synthesized at high pressure and high temperature
- Materials Science, Chemistry
Theoretical predictions of pressure-induced phase transformations often become long-standing enigmas because of limitations of contemporary available experimental possibilities. Hitherto the…