scholarly journals Coverage-dependent magnetic and electronic properties of graphene with Co adatoms

2021 ◽  
pp. 2150165
Author(s):  
Min Gao ◽  
Jun Hu
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Dirac Point ◽  
2D Materials ◽  
Anomalous Hall Effect ◽  
Spin Moment ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Spin Polarized ◽  
Topological States

Decorating two-dimensional (2D) materials with transition-metal adatoms is an effective way to bring about new physical properties that are intriguing for applications in electronics and spintronics devices. Here, we systematically studied the coverage-dependent magnetic and electronic properties of graphene decorated by Co adatoms, based on first-principles calculations. We found that if the Co coverage is larger than 1/3[Formula: see text]ML, the Co atoms will aggregate to form a Co monolayer and then a van der Waals bilayer system between the Co monolayer and graphene forms. When the Co coverage is [Formula: see text][Formula: see text]ML, the Co adatom is spin-polarized with spin moment varying from 1.1 to 1.4[Formula: see text][Formula: see text]. The [Formula: see text] and [Formula: see text] orbitals of Co hybridize significantly with the [Formula: see text] bands of graphene, which generates a series of new bands in the energy range from [Formula: see text][Formula: see text]eV to 1[Formula: see text]eV with respect to the Dirac point of graphene. In most cases, the new bands near the Fermi level lead to topological states characterized by the quantum anomalous Hall effect.

High mobility and enhanced photoelectric performance in two-dimensional ternary compounds NaCuX (X=S, Se, and Te)

2020 ◽  
Author(s):  
Heming Li ◽  
Xinxin Jiang ◽  
Xuhui Xu ◽  
Ge Xu ◽  
Dongmei Li ◽  
...  
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
2D Materials ◽  
High Mobility ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Ternary Compounds ◽  
Photoelectric Performance ◽  
Thin Structure

Two-dimensional (2D) materials have attracted great interests in the field of optoelectronics in recent years due to their atomically thin structure and various electronic properties. Based on the first-principles calculations...

Mechanical, thermal transport, electronic and photocatalytic properties of penta-PdPS, -PdPSe and -PdPTe monolayers explored by first-principles calculations

2021 ◽  
Author(s):  
Bohayra Mortazavi ◽  
Masoud Shahrokhi ◽  
Xiaoying Zhuang ◽  
Alexander V. Shapeev ◽  
Timon Rabczuk
Keyword(s):  
First Principles ◽  
Thermal Transport ◽  
2D Materials ◽  
Layered Materials ◽  
Photocatalytic Properties ◽  
Two Dimensional ◽  
First Principles Calculations

In the latest experimental advances in the field of two-dimensional (2D) materials, penta-PdPS and penta-PdPSe layered materials have been fabricated. In this work, we conduct first-principles calculations to explore the...

Strain engineering and electric field tunable of the electronic properties of two-dimensional ZnGeN2 monolayer

2021 ◽  
Author(s):  
Thi Nga Do ◽  
Son-Tung Nguyen ◽  
Khang Pham
Keyword(s):  
Electric Field ◽  
Electronic Properties ◽  
First Principles ◽  
Strain Engineering ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Structural And Electronic Properties

In this work, by means of the first-principles calculations, we investigate the structural and electronic properties of a two-dimensional ZnGeN2 monolayer as well as the effects of strains and electric...

Hydrogenation as a source of superconductivity in two-dimensional TiB2

2021 ◽  
pp. 2150057
Author(s):  
Hui Wang ◽  
Chen Pan ◽  
Sheng-Yan Wang ◽  
Hong Jiang ◽  
Yin-Chang Zhao ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Vibration Frequency ◽  
First Principles ◽  
Density Functional ◽  
Tensile Strain ◽  
2D Materials ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Density Functional Perturbation Theory ◽  
Potential Applications

Using first-principles calculations based on density functional perturbation theory, we demonstrate hydrogenation-induced superconductivity in monolayer TiB2H. Hydrogen adatoms destroy the Dirac state of monolayer TiB2 and monolayer TiB2H has a high vibration frequency. Monolayer TiB2H is a phonon-mediated superconductor. Monolayer TiB2H has a predicted [Formula: see text] of 8[Formula: see text]K, which further increases under external tensile strain. Thus, this study extends our understanding of superconductivity in two-dimensional (2D) materials and its potential applications.

scholarly journals Carrier-mediated ferromagnetism in two-dimensional PtS2

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 952-957 ◽  
Author(s):  
Konstantina Iordanidou ◽  
Michel Houssa ◽  
Clas Persson
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
First Principles ◽  
Density Functional ◽  
Hole Doping ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Functional Theory ◽  
The Impact

Using first principles calculations based on density functional theory the impact of hole doping on the magnetic and electronic properties of two dimensional PtS2 is studied.

First-principles calculations of the electronic properties of two-dimensional pentagonal structure XS2 (X=Ni, Pd, Pt)

Vacuum ◽  
2020 ◽  
Vol 174 ◽  
pp. 109176 ◽  
Author(s):  
Hongye Yang ◽  
Yinan Li ◽  
Zechen Yang ◽  
Xiaoqin Shi ◽  
Ziwei Lin ◽  
...  
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Two Dimensional ◽  
First Principles Calculations

scholarly journals A first principles study of the interaction between two-dimensional black phosphorus and Al2O3dielectric

RSC Advances ◽  
2017 ◽  
Vol 7 (23) ◽  
pp. 13777-13783 ◽  
Author(s):  
Jie Sun ◽  
Na Lin ◽  
Cheng Tang ◽  
Hao Ren ◽  
Xian Zhao
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Black Phosphorus ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
First Principles Study

First principles calculations have been performed to study the structural, energetic, and electronic properties of BP on Al-terminated and hydroxylated Al2O3(0001) surfaces.

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