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Metastable phase transitions and structural transformations in solid-state materials at high pressure

Metastable phase transitions and structural transformations in solid-state materials at high pressure
Metastable phase transitions and structural transformations in solid-state materials at high pressure
We use a combination of diamond anvil cell techniques and large volume (multi-anvil press, piston cylinder) devices to study the synthesis, structure and properties of new materials under high pressure conditions. The work often involves the study of structural and phase transformations occurring in the metastable regime, as we explore the phase space determined as a function of the pressure, temperature and chemical composition. The experimental studies are combined with first principles calculations and molecular dynamics simulations, as we determine the structures and properties of new phases and the nature of the transformations between them. Problems currently under investigation include structural studies of transition metal and main group nitrides, oxides and oxynitrides at high pressure, exploration of new solid-state compounds that are formed within the C-N-O system, polyamorphic low- to high-density transitions among amorphous semiconductors such as a-Si, and transformations into metastable forms of the element that occur when its “expanded” clathrate polymorph is compressed.
high pressure, solid state chemistry, metastable transitions, transition metal nitrides, silicon clathrates
1003-1032
McMillan, Paul
62a3d699-6f27-4fc2-b29a-8d3eacf9f094
Shebanova, Olga
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Daisenberger, Dominik
15d7e326-a7a1-40d0-8d01-ad81f026f241
Quesada Cabrera, Raul
416bb734-f7c1-4548-9238-17aee5572a2d
Bailey, Edward
f8d37c59-781a-489b-8758-273d05dc0129
Hector, Andrew
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Lees, Victoria
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Machon, Denis
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Sella, Andrea
d04fdf58-2444-4f63-99aa-3e5fd5d371ca
Wilson, Mark
ccccff82-8f4c-47bc-ba71-5f4319de73ff
McMillan, Paul
62a3d699-6f27-4fc2-b29a-8d3eacf9f094
Shebanova, Olga
e6580f7d-d9f0-48b1-84b1-43a2d6e9699e
Daisenberger, Dominik
15d7e326-a7a1-40d0-8d01-ad81f026f241
Quesada Cabrera, Raul
416bb734-f7c1-4548-9238-17aee5572a2d
Bailey, Edward
f8d37c59-781a-489b-8758-273d05dc0129
Hector, Andrew
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Lees, Victoria
e6c92450-2d42-492c-930c-78d56f2589b1
Machon, Denis
15cff449-29ab-4d07-aec4-e4cacb58e090
Sella, Andrea
d04fdf58-2444-4f63-99aa-3e5fd5d371ca
Wilson, Mark
ccccff82-8f4c-47bc-ba71-5f4319de73ff

McMillan, Paul, Shebanova, Olga, Daisenberger, Dominik, Quesada Cabrera, Raul, Bailey, Edward, Hector, Andrew, Lees, Victoria, Machon, Denis, Sella, Andrea and Wilson, Mark (2007) Metastable phase transitions and structural transformations in solid-state materials at high pressure. Phase Transitions, 80 (10), 1003-1032. (doi:10.1080/01411590701473010).

Record type: Article

Abstract

We use a combination of diamond anvil cell techniques and large volume (multi-anvil press, piston cylinder) devices to study the synthesis, structure and properties of new materials under high pressure conditions. The work often involves the study of structural and phase transformations occurring in the metastable regime, as we explore the phase space determined as a function of the pressure, temperature and chemical composition. The experimental studies are combined with first principles calculations and molecular dynamics simulations, as we determine the structures and properties of new phases and the nature of the transformations between them. Problems currently under investigation include structural studies of transition metal and main group nitrides, oxides and oxynitrides at high pressure, exploration of new solid-state compounds that are formed within the C-N-O system, polyamorphic low- to high-density transitions among amorphous semiconductors such as a-Si, and transformations into metastable forms of the element that occur when its “expanded” clathrate polymorph is compressed.

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More information

Published date: October 2007
Keywords: high pressure, solid state chemistry, metastable transitions, transition metal nitrides, silicon clathrates

Identifiers

Local EPrints ID: 145981
URI: http://eprints.soton.ac.uk/id/eprint/145981
PURE UUID: 601f7466-5c98-4289-9794-89cd9e0d46bb
ORCID for Andrew Hector: ORCID iD orcid.org/0000-0002-9964-2163

Catalogue record

Date deposited: 09 Jun 2010 11:45
Last modified: 14 Mar 2024 02:39

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Contributors

Author: Paul McMillan
Author: Olga Shebanova
Author: Dominik Daisenberger
Author: Raul Quesada Cabrera
Author: Edward Bailey
Author: Andrew Hector ORCID iD
Author: Victoria Lees
Author: Denis Machon
Author: Andrea Sella
Author: Mark Wilson

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