scholarly journals Atomic and electronic structures of charge-doping VO2: first-principles calculations

RSC Advances ◽  
2020 ◽  
Vol 10 (32) ◽  
pp. 18543-18552 ◽  
Author(s):  
Lanli Chen ◽  
Yuanyuan Cui ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
First Principles ◽  
Electronic Structures ◽  
First Principles Calculations ◽  
Charge Doping

The controllable phase transition temperature in charge doping VO2 is coupled with changes in the atomic and electronic structures. The current results provide a variable way to tune the VO2 phase transition temperature through charge doping.

Orbital change manipulation metal–insulator transition temperature in W-doped VO2

2015 ◽  
Vol 17 (17) ◽  
pp. 11638-11646 ◽  
Author(s):  
Xinfeng He ◽  
Yijie Zeng ◽  
Xiaofeng Xu ◽  
Congcong Gu ◽  
Fei Chen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Infrared Spectroscopy ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
First Principles ◽  
Insulator Transition ◽  
First Principles Calculations ◽  
Orbital Structure ◽  
Metal Insulator Transition ◽  
Metal Insulator

Using ultraviolet-infrared spectroscopy and first principles calculations, it is revealed that changes in the orbital structure can regulate the W-doped VO2 phase transition temperature.

First-principles study on the phase transition temperature of X-doped (X = Li, Na or K) VO2

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64394-64399 ◽  
Author(s):  
Yuanyuan Cui ◽  
Yongxin Wang ◽  
Bin Liu ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Infrared Absorption ◽  
First Principles ◽  
Electronic Structures ◽  
Near Infrared ◽  
Doping Element ◽  
First Principles Study

The calculated electronic structures and optical properties indicate that K can be selected as an appropriate doping element for VO2, since it can effectively lower the phase transition temperature as well as enhance the near-infrared absorption.

scholarly journals Effect of Zn doping on phase transition and electronic structures of Heusler-type Pd2Cr-based alloys: from normal to all-d-metal Heusler

RSC Advances ◽  
2020 ◽  
Vol 10 (30) ◽  
pp. 17829-17835
Author(s):  
Xiaotian Wang ◽  
Mengxin Wu ◽  
Tie Yang ◽  
Rabah Khenata
Keyword(s):  
Phase Transition ◽  
Electronic Structure ◽  
First Principles ◽  
Electronic Structures ◽  
Heusler Alloys ◽  
First Principles Calculations ◽  
Zn Doping

By first-principles calculations, for Heusler alloys Pd2CrZ (Z = Al, Ga, In, Tl, Si, Sn, P, As, Sb, Bi, Se, Te, Zn), the effect of Zn doping on their phase transition and electronic structure has been studied in this work.

Hydrogen-doping induced reduction in the phase transition temperature of VO2: a first-principles study

2015 ◽  
Vol 17 (32) ◽  
pp. 20998-21004 ◽  
Author(s):  
Yuanyuan Cui ◽  
Siqi Shi ◽  
Lanli Chen ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
First Principles ◽  
First Principles Study ◽  
Hydrogen Doping ◽  
External Strain

The phase transition temperature of H-doped VO2 is more sensitive to external strain as compared with that of pure VO2.

Structural Phase Transition and Electronic Properties of MgCe under High Pressure from First-Principles Calculations

2014 ◽  
Vol 577 ◽  
pp. 102-107
Author(s):  
Qiu Xiang Liu ◽  
De Ping Lu ◽  
Rui Jun Zhang ◽  
Lei Lu ◽  
Shi Fang Xie
Keyword(s):  
Phase Transition ◽  
Ground State ◽  
First Principles ◽  
Electronic Structures ◽  
Density Functional ◽  
High Pressures ◽  
Local Density ◽  
Structural Phase ◽  
First Principles Calculations ◽  
Functional Theory

The structural stability of MgCe under high pressures has been investigated by using the first-principles plane-wave pseudopotential density functional theory within the local density approximation (LDA). The obtained results predict that MgCe in the Ba structure is predicted to be the most stable structure corresponding to the ground state, because of lowest total energy. MgCe undergoes a pressure-induced phase transition from the Ba structure to B32 structure at 36 GPa. And no further transition is found up to 120 GPa. In addition, the electronic structures of four structures of MgCe are also calculated and discussed.

Tuning the phase transition temperature, electrical and optical properties of VO2 by oxygen nonstoichiometry: insights from first-principles calculations

RSC Advances ◽  
2016 ◽  
Vol 6 (77) ◽  
pp. 73070-73082 ◽  
Author(s):  
Lanli Chen ◽  
Xiaofang Wang ◽  
Dongyun Wan ◽  
Yuanyuan Cui ◽  
Bin Liu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Transition Temperature ◽  
Electron Concentration ◽  
First Principles ◽  
Oxygen Nonstoichiometry ◽  
First Principles Calculations ◽  
Electrical And Optical Properties ◽  
Work Functions ◽  
O Vacancy

The O-vacancy in bulk VO2 gives rise to an increase in electron concentration, which induces a decrease in Tc. While, O-vacancy and O-adsorption on VO2(R) (1 1 0) and VO2(M) (0 1 1) surfaces could alter the work functions and in turn regulate Tc.

Phase Transition and ThermodynamicProperties of OsN2 under High Pressure

2013 ◽  
Vol 401-403 ◽  
pp. 660-662
Author(s):  
Zhi Jian Fu ◽  
Li Jun Jia ◽  
Wei Long Quan
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Thermal Expansion ◽  
Phase Transitions ◽  
Transition Temperature ◽  
Thermodynamic Properties ◽  
First Principles ◽  
Fluorite Structure ◽  
First Principles Calculations ◽  
Zero Temperature

The lattice parameters, phase transition, and thermodynamic properties of OsN2in pyrite and fluorite structure are investigated by first-principles calculations. The pressure and temperature induced phase transitions of OsN2from fluorite structure to pyrite structure have been obtained. It is found that the transition pressure of OsN2at zero temperature is 158.2 GPa, and there exists no transition temperature. In addition, the thermal expansion, the Debye temperature, and the Grüneisen parameter in diverse pressures and temperatures about these two structures have also been obtained. Key words: transition phase; thermodynamic properties; OsN2PACS numbers: 71.15.Mb, 64.70.Kb

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