Pressure induced semiconductor–metal phase transition in GaAs: experimental and theoretical approaches

RSC Advances ◽  
2016 ◽  
Vol 6 (12) ◽  
pp. 10144-10149 ◽  
Author(s):  
Jia Wang ◽  
Baojia Wu ◽  
Guozhao Zhang ◽  
Lianhua Tian ◽  
Guangrui Gu ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
First Principles ◽  
Metal Phase ◽  
First Principles Calculations ◽  
Electrical Measurements ◽  
Theoretical Approaches ◽  
Metal Phase Transition

GaAs undergoes a semiconductor–metal transition, which was investigated by in situ electrical measurements and first-principles calculations under a high pressure.

scholarly journals Pressure-driven electronic phase transition in the high-pressure phase of nitrogen-rich 1H-tetrazoles

RSC Advances ◽  
2021 ◽  
Vol 11 (35) ◽  
pp. 21507-21513
Author(s):  
Ying Liu ◽  
Huifang Du ◽  
Leiming Fang ◽  
Fei Sun ◽  
Haipeng Su ◽  
...  
Keyword(s):  
Phase Transition ◽  
Hydrogen Bond ◽  
High Pressure ◽  
First Principles ◽  
High Pressure Phase ◽  
First Principles Calculations ◽  
Electronic Phase ◽  
Pressure Phase ◽  
Pressure Driven

Combined high pressure in situ spectra with first-principles calculations, a possible hydrogen-bond assisted phase transition was proposed in tetrazole.

Theoretical aspects in structural distortion and the electronic properties of lithium peroxide under high pressure

2018 ◽  
Vol 20 (14) ◽  
pp. 9488-9497 ◽  
Author(s):  
Pornmongkol Jimlim ◽  
Komsilp Kotmool ◽  
Udomsilp Pinsook ◽  
Suttichai Assabumrungrat ◽  
Rajeev Ahuja ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Electronic Properties ◽  
Structural Phase Transition ◽  
First Principles ◽  
Structural Phase ◽  
Structural Distortion ◽  
First Principles Calculations ◽  
Lithium Peroxide

The structural phase transition and electronic properties of Li2O2 under pressures up to 500 GPa have been investigated using first-principles calculations.

scholarly journals Ab Initio High-Pressure Study of Semiconductor-Metal Phase Transition of the Chalcogenide Compound KPSe6

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
P. O. Jomo ◽  
C. O. Otieno ◽  
P. W. O. Nyawere
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Ab Initio ◽  
Density Functional ◽  
Basis Sets ◽  
Metal Phase ◽  
Generalized Gradient ◽  
Energy Calculations ◽  
Metal Phase Transition ◽  
Chalcogenide Compound

We report the results of pressure-induced semiconductor-metal phase transition of the semiconducting chalcogenide compound KPSe6 under high pressure using the ab initio methods. The ground-state energy calculations were performed within density functional theory and the generalized gradient approximation using the pseudopotential method with plane-wave basis sets. The projector augmented-wave (PAW) pseudopotentials were used in our calculation. The optimized lattice parameters were found from total energy calculations as 13 Bohr, 1.6 Bohr, and 1.8 Bohr for cell dimensions one, two, and three, respectively, which are in good agreement with experimental calculations. At zero pressure, the material portrayed a semiconducting property with a direct bandgap of ≈1.7 eV. As we subjected the material to pressure, the band gap was observed to reduce until it disappeared. The phase transition from the semiconductor to metal was found to occur at ∼45 GPa, implying that the material underwent metallization as pressure was increased further.

Study of Phase Transformation in BaTe2O6 by in Situ High-Pressure X-ray Diffraction, Raman Spectroscopy, and First-Principles Calculations

2015 ◽  
Vol 55 (1) ◽  
pp. 227-238 ◽  
Author(s):  
K. K. Mishra ◽  
S. Nagabhusan Achary ◽  
Sharat Chandra ◽  
T. R. Ravindran ◽  
K. K. Pandey ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Phase Transformation ◽  
First Principles ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
X Ray

First-Principles Calculations of Phase Transition and Stability of Si 2 CN 4 under High Pressure

2009 ◽  
Vol 26 (1) ◽  
pp. 016403 ◽  
Author(s):  
Du Hui-Jing ◽  
Guo Li-Cong ◽  
Li Dong-Chun ◽  
Yu Dong-Li ◽  
He Ju-Long
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
First Principles ◽  
First Principles Calculations

First-Principles Investigations of Structural Stability of LuN

2013 ◽  
Vol 690-693 ◽  
pp. 559-563 ◽  
Author(s):  
Xiao Cui Yang ◽  
En Jie Zhang ◽  
Hong Yuan Ma ◽  
Jun Ping Xiao
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Structural Stability ◽  
First Principles ◽  
Phonon Dispersion ◽  
Type Structure ◽  
First Principles Calculations ◽  
Phonon Dispersion Curves ◽  
Elevated Pressures ◽  
Cscl Type

An investigation on structural stability of LuN under high pressure has been conducted using first-principles calculations. At elevated pressures LuN is predicted to undergo a phase transition from NaCl-type structure (B1) into CsCl-type structure (B2). The predicted transition pressure is 220 GPa. The phonon dispersion curves of B1 and B2 at 0 and 220 GPa are presented.

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