scholarly journals Realization of a p–n junction in a single layer boron-phosphide

2015 ◽  
Vol 17 (19) ◽  
pp. 13013-13020 ◽  
Author(s):  
Deniz Çakır ◽  
Deniz Kecik ◽  
Hasan Sahin ◽  
Engin Durgun ◽  
Francois M. Peeters
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Mechanical Stability ◽  
Single Layer ◽  
First Principles Calculations ◽  
Promising Candidate ◽  
Boron Phosphide

First-principles calculations indicate that due to its mechanical stability and promising electronic properties, boron-phosphide monolayer would be a promising candidate for application in a p–n junction.

First-Principles Study on the Electronic Structure of Bulk and Single-Layer Boehmite

NANO ◽  
2018 ◽  
Vol 13 (12) ◽  
pp. 1850138
Author(s):  
Seungwook Son ◽  
Dongwook Kim ◽  
Sutassana Na-Phattalung ◽  
Jisoon Ihm
Keyword(s):  
Hydrogen Bonding ◽  
First Principles ◽  
Single Layer ◽  
Layered Materials ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Promising Candidate ◽  
Electronic Band ◽  
2D Layered Materials ◽  
Electronic Band Structures

Two-dimensional (2D) or layered materials have a great potential for applications in energy storage, catalysis, optoelectronics and gas separation. Fabricating novel 2D or quasi-2D layered materials composed of relatively abundant and inexpensive atomic species is an important issue for practical usage in industry. Here, we suggest the layer-structured AlOOH (Boehmite) as a promising candidate for such applications. Boehmite is a well-known layer-structured material and a single-layer can be exfoliated from the bulk boehmite by breaking the interlayer hydrogen bonding. We study atomic and electronic band structures of both bulk and single-layer boehmite, and also obtain the single-layer exfoliation energy using first-principles calculations.

Modulating the phase transition between metallic and semiconducting single-layer MoS2 and WS2 through size effects

2015 ◽  
Vol 17 (2) ◽  
pp. 1099-1105 ◽  
Author(s):  
Ziyu Hu ◽  
Shengli Zhang ◽  
Yan-Ning Zhang ◽  
Da Wang ◽  
Haibo Zeng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electronic Properties ◽  
First Principles ◽  
Size Effects ◽  
Single Layer ◽  
First Principles Calculations ◽  
Atomic Mechanism ◽  
Junction Structure

The first-principles calculations are performed to investigate the electronic properties and atomic mechanism of the single layer MoS2 or WS2 homo-junction structure.

scholarly journals Elastic Properties and Electronic Properties of MxNy (M = Ti, Zr) from First Principles Calculations

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1640 ◽  
Author(s):  
Yangqi Ji ◽  
Xiaoli Yuan
Keyword(s):  
Electronic Properties ◽  
Elastic Properties ◽  
First Principles ◽  
Density Functional ◽  
Mechanical Stability ◽  
Central Force ◽  
First Principles Calculations ◽  
Functional Theory ◽  
Space Group ◽  
Group I

The elastic properties and electronic properties of MxNy (M = Ti, Zr) TiN, Ti2N, Zr3N4, ZrN with different structures have been investigated using density functional theory. Through the calculation of the elastic constants, it was found that all of these structures meet the mechanical stability except for ZrN with space group P63mc. Their mechanical properties are studied by a comparison of various parameters. The stiffness of TiN is larger than that of ZrN with space group Fm 3 ¯ m. Ti2N’s stiffness with space group I41/amdz is larger than Ti2N with space group P42/mnm. Zr3N4’s stiffness with space group Pnam is largest in three structures of Zr3N4. TiN, Ti2N and ZrN are non-central force, Zr3N4 is central force. TiN and ZrN with space group Fm 3 ¯ m are brittle, and TiN is brittler than ZrN with space group Fm 3 ¯ m. The two kinds of Ti2N are brittle and Ti2N with space group I41/amdz is larger. Three structures of Zr3N4 are tough and Zr3N4 with space group I 4 ¯ 3d is the toughest. Meanwhile, the electronic properties of TiN, Ti2N, Zr3N4 and ZrN were calculated, possible superconducting properties of the studied materials were predicted.

The Structural and Electronic Properties of the Zigzag GaN Nanoribbons: A First-Principles Study

2013 ◽  
Vol 700 ◽  
pp. 79-82
Author(s):  
Guo Xiang Chen ◽  
Dou Dou Wang
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
Energy Region ◽  
Single Layer ◽  
Band Gaps ◽  
First Principles Calculations ◽  
Zigzag Edge ◽  
Minority Spin ◽  
Structural And Electronic Properties ◽  
Semiconductor Character

We have performed the first-principles calculations onto the structural and electronic properties of GaN nanoribbons with zigzag edge (ZGaNNRs). The results show that, the lowest unoccupied conduction band (LUCB) and the highest occupied valence band (HOVB) are always separated, representing a semiconductor character for the ZGaNNRs. In addition, the majority and minority spin bands are fully superposition and therefore the ZGaNNRs are non-magnetic. As the nanoribbons width increase, band gaps of ZGaNNRs decrease monotonically and become close to their asymptotic limit of a single layer of GaN sheet. It is found that the fewer coordination number will lead the most electrons to range in higher energy region of the occupancy state.

High elastic moduli, controllable bandgap and extraordinary carrier mobility in single-layer diamond

2020 ◽  
Vol 8 (39) ◽  
pp. 13819-13826
Author(s):  
Ting Cheng ◽  
Zhongfan Liu ◽  
Zhirong Liu
Keyword(s):  
Mechanical Strength ◽  
Electronic Properties ◽  
First Principles ◽  
Carrier Mobility ◽  
Room Temperature ◽  
Elastic Moduli ◽  
Single Layer ◽  
First Principles Calculations ◽  
High Mechanical Strength ◽  
Direct Bandgap

Fluorinated single layer diamond is found by first-principles calculations to be a wide-direct bandgap material at the Γ-point, exhibiting a high mechanical strength, adjustable electronic properties and extraordinary carrier mobility at room temperature.

Structural, elastic and electronic properties of new superhard orthorhombic C28

2019 ◽  
Vol 33 (20) ◽  
pp. 1950227
Author(s):  
Rui Zhang ◽  
Qun Wei ◽  
Bing Wei ◽  
Ruike Yang ◽  
Ke Cheng ◽  
...  
Keyword(s):  
Band Structure ◽  
Electronic Properties ◽  
Vickers Hardness ◽  
First Principles ◽  
Superhard Material ◽  
Mechanical Stability ◽  
Elastic Anisotropy ◽  
First Principles Calculations ◽  
Stability Criteria ◽  
Imaginary Frequency

The structural, mechanical and electronic properties of recently reported superhard material C[Formula: see text] are studied by first-principles calculations. The unit cell of C[Formula: see text] is composed of 28 carbon atoms and all sp3 hybridized bonds. From 0 GPa to 100 GPa, C[Formula: see text] satisfies the mechanical stability criteria and the phonon spectrum of C[Formula: see text] has no imaginary frequency, which means that C[Formula: see text] is mechanically and dynamically stable. The results of hardness calculated show that C[Formula: see text] is a potential superhard material with the Vickers hardness of 84.0 GPa. By analyzing the elastic anisotropy, we found that elastic anisotropy of C[Formula: see text] increases with pressure. The calculations of band structure demonstrates that C[Formula: see text] is an indirect bandgap semiconductor with the gap of 4.406 eV. These analyses demonstrate C[Formula: see text] is a superhard semiconductor material.

First-principles calculations of structural, mechanical and electronic properties of TiNi-X (X=C, Si, Ge, Sn, Pb) alloys

2019 ◽  
Vol 33 (16) ◽  
pp. 1950167
Author(s):  
Dan Hong ◽  
Wei Zeng ◽  
Zhao Xin ◽  
Fu-Sheng Liu ◽  
Bin Tang ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
First Principles ◽  
Density Functional ◽  
Mechanical Stability ◽  
Main Group ◽  
First Principles Calculations ◽  
Functional Theory ◽  
Main Group Elements ◽  
Lattice Constants

We adopted the first-principles calculations within density functional theory (DFT) to investigate the structures, elastic, and electronic properties of ternary TiNi-X alloys with different four main-group elements by using the CASTEP code. The lattice constants and volumes increase gradually from C to Pb. The mechanical stability has been discussed by utilizing the criteria. All alloys are mechanically stable except TiNiPb. The values of Young’s modulus gradually decreased. Oppositely, the values of [Formula: see text]/[Formula: see text] and [Formula: see text] are increased, respectively. The ductility/brittleness of alloys is distinct. In addition, the width of pseudogap is gradually decreased, which is consistent with hardness, showing that the covanlency of TiNi-X alloys is decreased. Similarly, these properties of the remaining alloys are also discussed and results are stated in the paper.

The mechanical and electronic properties of o-Fe2C, h-Fe3C, t-Fe5C2, m-Fe5C2 and h-Fe7C3 compounds: First-principles calculations

2021 ◽  
Vol 606 ◽  
pp. 412825
Author(s):  
Wei-Hong Liu ◽  
Wei Zeng ◽  
Fu-Sheng Liu ◽  
Bin Tang ◽  
Qi-Jun Liu ◽  
...  
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
First Principles Calculations
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