DEFECT PHYSICS AND INTRINSIC p-TYPE CONDUCTIVITY IN TOPOLOGICAL INSULATOR AuTlS2

2014 ◽  
Vol 28 (02) ◽  
pp. 1450008 ◽  
Author(s):  
JIAN-MIN ZHANG ◽  
WANGXIANG FENG ◽  
PEI YANG ◽  
LIJIE SHI ◽  
YING ZHANG
Keyword(s):  
Point Defects ◽  
Topological Insulator ◽  
First Principles ◽  
Optimal Growth ◽  
Growth Conditions ◽  
First Principles Calculations ◽  
Type Conductivity ◽  
Native Point Defects ◽  
P Type ◽  
Optimal Growth Condition

Using first-principles calculations, we systematically investigate the defect physics in topological insulator AuTlS 2. An optimal growth condition is explicitly proposed to guide for the experimental synthesis. The stabilities of various native point defects under different growth conditions and different carrier environments are studied in detail. We show that the p-type conductivity is strongly preferred in AuTlS 2, and the band gap can be engineered by the control of intrinsic defects. Our results demonstrate that AuTlS 2 is an ideal p-type topological insulator which can be easily integrated with traditional semiconductor.

scholarly journals Native point defects in CuIn1−xGaxSe2: hybrid density functional calculations predict the origin of p- and n-type conductivity

2014 ◽  
Vol 16 (40) ◽  
pp. 22299-22308 ◽  
Author(s):  
J. Bekaert ◽  
R. Saniz ◽  
B. Partoens ◽  
D. Lamoen
Keyword(s):  
Charge Carrier ◽  
Point Defects ◽  
First Principles ◽  
Density Functional Calculations ◽  
Density Functional ◽  
First Principles Calculations ◽  
Photoluminescence Spectra ◽  
Type Conductivity ◽  
Native Point Defects ◽  
Hybrid Density Functional

Starting from first-principles calculations, many experimental observations such as photoluminescence spectra, charge carrier densities and freeze-out can be explained.

The n-type and p-type conductivity mechanisms of bulk BiOCl photocatalyst from hybrid density functional theory calculations

2021 ◽  
Author(s):  
Bo Kong ◽  
Tixian Zeng ◽  
Wentao Wang
Keyword(s):  
First Principles ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Growth Conditions ◽  
Hybrid Density Functional Theory ◽  
First Principles Calculations ◽  
Functional Theory ◽  
Type Conductivity ◽  
P Type ◽  
Hybrid Density Functional

Abstract: In this work, the n-type and p-type conductivity mechanisms of bulk BiOCl are systematically investigated using first-principles calculations. Under the O-rich growth conditions, BiOCl presents the intrinsic p-type conductivity,...

scholarly journals Correction: p-Type conductivity mechanism and defect structure of nitrogen-doped LiNbO3 from first-principles calculations

2020 ◽  
Vol 22 (3) ◽  
pp. 1784-1784
Author(s):  
Weiwei Wang ◽  
Yang Zhong ◽  
Dahuai Zheng ◽  
Hongde Liu ◽  
Yongfa Kong ◽  
...  
Keyword(s):  
First Principles ◽  
Defect Structure ◽  
Chem Phys ◽  
First Principles Calculations ◽  
Type Conductivity ◽  
Nitrogen Doped ◽  
Conductivity Mechanism ◽  
P Type ◽  
Phys Chem Chem Phys

Correction for ‘p-Type conductivity mechanism and defect structure of nitrogen-doped LiNbO3 from first-principles calculations’ by Weiwei Wang et al., Phys. Chem. Chem. Phys., 2020, 22, 20–27.

p-Type conductivity mechanism and defect structure of nitrogen-doped LiNbO3 from first-principles calculations

2020 ◽  
Vol 22 (1) ◽  
pp. 20-27 ◽  
Author(s):  
Weiwei Wang ◽  
Yang Zhong ◽  
Dahuai Zheng ◽  
Hongde Liu ◽  
Yongfa Kong ◽  
...  
Keyword(s):  
Charge State ◽  
First Principles ◽  
Defect Structure ◽  
State Transition ◽  
First Principles Calculations ◽  
Type Conductivity ◽  
Nitrogen Doped ◽  
Conductivity Mechanism ◽  
Transition Level ◽  
P Type

The charge-state transition level and geometry structure of non-metallic N-doped LiNbO3 are calculated by DFT, which reveal the p-type conductivity mechanism of LiNbO3:N.

The effect of sulfur on the electrical properties of S and N co-doped ZnO thin films: experiment and first-principles calculations

2015 ◽  
Vol 17 (26) ◽  
pp. 16705-16708 ◽  
Author(s):  
Wenzhe Niu ◽  
Hongbin Xu ◽  
Yanmin Guo ◽  
Yaguang Li ◽  
Zhizhen Ye ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
First Principles ◽  
Zno Thin Films ◽  
First Principles Calculations ◽  
Type Conductivity ◽  
Doped Zno ◽  
P Type ◽  
Co Doped

The S dopants in S–N co-doped ZnO contribute to easier doping and p-type conductivity, as concluded by experiment and calculations.

scholarly journals The role of the VZn–NO–H complex in the p-type conductivity in ZnO

2015 ◽  
Vol 17 (7) ◽  
pp. 5485-5489 ◽  
Author(s):  
M. N. Amini ◽  
R. Saniz ◽  
D. Lamoen ◽  
B. Partoens
Keyword(s):  
First Principles ◽  
Formation Energy ◽  
First Principles Calculations ◽  
Deep Acceptor ◽  
Type Conductivity ◽  
Acceptor Complex ◽  
Hole Level ◽  
P Type

With the help of first-principles calculations, we investigate the VZn–NO–H acceptor complex in ZnO. We find that H plays an important role, because it lowers the formation energy of the complex with respect to VZn–NO, a complex known to exhibit p-type behavior. However, this additional H atom also occupies the hole level of VZn–NO making the VZn–NO–H complex a deep acceptor.

Investigation of Native Point Defects and Nonstoichiometry Mechanisms of Two Yttrium Silicates by First-Principles Calculations

2013 ◽  
Vol 96 (10) ◽  
pp. 3304-3311 ◽  
Author(s):  
Bin Liu ◽  
Jiemin Wang ◽  
Fangzhi Li ◽  
Luchao Sun ◽  
Jingyang Wang ◽  
...  
Keyword(s):  
Point Defects ◽  
First Principles ◽  
First Principles Calculations ◽  
Native Point Defects

First-principles calculations of intrinsic defects in the p-type semiconductor CuAlO2

2010 ◽  
Vol 88 (12) ◽  
pp. 927-932 ◽  
Author(s):  
Dan Huang ◽  
Yuanming Pan
Keyword(s):  
First Principles ◽  
Defect Formation ◽  
First Principles Calculations ◽  
Image Charge ◽  
Intrinsic Defects ◽  
Type Conductivity ◽  
The Poor ◽  
Type Semiconductor ◽  
P Type ◽  
Formation Energies

Intrinsic defects, including vacancies at the Cu and Al sites (VCu and VAl), substitutional Cu at the Al site (CuAl), and interstitial O (Oi), have been proposed to be responsible for the p-type conductivity in CuAlO2. We have investigated the formation energies of these and other intrinsic defects in CuAlO2 using GGA+U calculations. Our results support previous studies that the potential alignment and image charge correction are required in the calculation of defect formation energies by using the supercell approach. In CuAlO2, these p-type defects (VCu, VAl, CuAl, and Oi) invariably have lower formation energies than their n-type counterparts. Particularly, VCu and CuAl have the lowest formation energies among intrinsic defects, and therefore are most likely responsible for the p-type conductivity. However, the transition levels of the VCu and CuAl defects are deep, which are responsible for the poor p-type conductivity in CuAlO2.

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