Structure of liquid phosphorus: A liquid-liquid phase transition via constant-pressure first-principles molecular dynamics
Identifieur interne : 00BB65 ( Main/Exploration ); précédent : 00BB64; suivant : 00BB66Structure of liquid phosphorus: A liquid-liquid phase transition via constant-pressure first-principles molecular dynamics
Auteurs : Tetsuya Morishita [Japon]Source :
- Computer physics communications [ 0010-4655 ] ; 2001.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Phosphore.
English descriptors
- KwdEn :
Abstract
Constant-pressure first-principles molecular dynamics simulations have been carried out to study structural phase transitions of liquid black phosphorus. By compressing the tetrahedral molecular liquid (a low-pressure phase), a structural phase transition from the molecular to polymeric liquid (a high-pressure phase) was successfully realized just as observed in the recent experiment by Katayama et al. [Nature 170 (2000) 403]. Structural properties in the polymeric liquid were investigated and it is found that the covalent p-state bonds are dominant within the first nearest neighbors of each atom. However, further compression of the polymeric liquid shows that the covalent bonding is weakened as pressure is increased. As a result, liquid phosphorus becomes similar to the simple liquid in which atoms form a close-packed structure at very high pressure.
Affiliations:
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Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Calculation methods</term>
<term>Compressible liquid</term>
<term>High pressure</term>
<term>Liquid phase</term>
<term>Liquid-liquid transformations</term>
<term>Modelling</term>
<term>Molecular dynamics method</term>
<term>Phase transitions</term>
<term>Phosphorus</term>
<term>Structural analysis</term>
<term>Tetrahedral configuration</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Méthode dynamique moléculaire</term>
<term>Phase liquide</term>
<term>Phosphore</term>
<term>Transformation liquide liquide</term>
<term>Transition phase</term>
<term>Analyse structurale</term>
<term>Haute pression</term>
<term>Configuration tétraédrique</term>
<term>Liquide compressible</term>
<term>Méthode calcul</term>
<term>Modélisation</term>
<term>First-principles</term>
<term>6470J</term>
<term>6120J</term>
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<front><div type="abstract" xml:lang="en">Constant-pressure first-principles molecular dynamics simulations have been carried out to study structural phase transitions of liquid black phosphorus. By compressing the tetrahedral molecular liquid (a low-pressure phase), a structural phase transition from the molecular to polymeric liquid (a high-pressure phase) was successfully realized just as observed in the recent experiment by Katayama et al. [Nature 170 (2000) 403]. Structural properties in the polymeric liquid were investigated and it is found that the covalent p-state bonds are dominant within the first nearest neighbors of each atom. However, further compression of the polymeric liquid shows that the covalent bonding is weakened as pressure is increased. As a result, liquid phosphorus becomes similar to the simple liquid in which atoms form a close-packed structure at very high pressure.</div>
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