scholarly journals Simple Model for Corrugation in Surface Alloys Based on First-Principles Calculations

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4444
Author(s):  
Monika Nur ◽  
Naoya Yamaguchi ◽  
Fumiyuki Ishii
Keyword(s):  
Simple Model ◽  
Structural Stability ◽  
First Principles ◽  
Surface Alloy ◽  
Atomic Model ◽  
First Principles Calculations ◽  
Surface Alloys ◽  
Group Iii ◽  
New Type ◽  
Atomic Radii

The structural stability of M/Ag(111)–3×3R30°  surface alloys is systematically investigated by using first-principles calculations, where M is a member of group III (B, Al, Ga, In, Tl), IV (C, Si, Ge, Sn, Pb), and V (N, P, As, Sb, Bi) elements. We focus on the corrugation parameter d which is determined by the height of the M atom from the Ag atom in the plane of the top-most atom, and the relation between atomic radii and corrugations in M/Ag(111) is obtained. The tendencies of the corrugation parameter d can be understood by using a simple hard spherical atomic model. We introduce a new type of atomic radii determined by the corrugation in surface alloys, surface alloy atomic radii, which can be useful for rapid predictions of the structures of surface alloys, not only for M/Ag (111)–3×3R30° systems but also for other surface alloys.

scholarly journals Phase Stability and Magnetic Properties of Mn3Z (Z = Al, Ga, In, Tl, Ge, Sn, Pb) Heusler Alloys

2019 ◽  
Vol 9 (5) ◽  
pp. 964 ◽  
Author(s):  
Haopeng Zhang ◽  
Wenbin Liu ◽  
Tingting Lin ◽  
Wenhong Wang ◽  
Guodong Liu
Keyword(s):  
Magnetic Properties ◽  
Structural Stability ◽  
Phase Stability ◽  
First Principles ◽  
Magnetic Moments ◽  
Heusler Alloys ◽  
Atomic Radius ◽  
Tetragonal Distortion ◽  
Stable Phase ◽  
First Principles Calculations

The structural stability and magnetic properties of the cubic and tetragonal phases of Mn3Z (Z = Ga, In, Tl, Ge, Sn, Pb) Heusler alloys are studied by using first-principles calculations. It is found that with the increasing of the atomic radius of Z atom, the more stable phase varies from the cubic to the tetragonal structure. With increasing tetragonal distortion, the magnetic moments of Mn (A/C and B) atoms change in a regular way, which can be traced back to the change of the relative distance and the covalent hybridization between the atoms.

scholarly journals Structural Stability of Functionalized Silicene Nanoribbons with Normal, Reconstructed, and Hybrid Edges

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Sadegh Mehdi Aghaei ◽  
Ingrid Torres ◽  
Irene Calizo
Keyword(s):  
Structural Stability ◽  
First Principles ◽  
Experimental Investigations ◽  
First Principles Calculations ◽  
Zigzag Edge ◽  
Edge Structure ◽  
Practical Applications ◽  
Potential Applications ◽  
Silicene Nanoribbons ◽  
Significant Attention

Silicene, a novel graphene-like material, has attracted a significant attention because of its potential applications for nanoelectronics. In this paper, we have theoretically investigated the structural stability of edge-hydrogenated and edge-fluorinated silicene nanoribbons (SiNRs) via first-principles calculations. Various edge forms of SiNRs including armchair edge, zigzag edge, Klein edge, reconstructed Klein edge, reconstructed pentagon-heptagon edge, and hybrid edges have been considered. It has been found that fully fluorinated Klein edge SiNRs, in which each edge Si atom is terminated by three fluorine atoms, are the most stable structure. We also discovered that a hybrid edge structure of trihydrogenated Klein edge and dihydrogenated zigzag edge can increase the nanoribbon’s stability up to that of dihydrogenated armchair edge SiNR, which is known as the most stable edge-hydrogenated structure. With the attractive properties of silicene for practical applications, the obtained results will advance experimental investigations toward the development of silicene based devices.

Structural stability of Ni–Mo compounds from first-principles calculations

2005 ◽  
Vol 52 (1) ◽  
pp. 17-20 ◽  
Author(s):  
Y. Wang ◽  
C. Woodward ◽  
S.H. Zhou ◽  
Z.-K. Liu ◽  
L.-Q. Chen
Keyword(s):  
Structural Stability ◽  
First Principles ◽  
First Principles Calculations

First-Principles Study on the Clean and Nb Doped TiO2(110)γ-TiAl(111) Interfaces

2012 ◽  
Vol 602-604 ◽  
pp. 555-558 ◽  
Author(s):  
Hui Nan Hao ◽  
Xu Wang ◽  
Fu He Wang
Keyword(s):  
Structural Stability ◽  
Density Of States ◽  
Chemical Bonding ◽  
First Principles ◽  
Adhesion Energy ◽  
First Principles Calculations ◽  
First Principles Study

In this paper, the structural stability, adhesion and chemical bonding of the TiO2 (110)/TiAl (111) interface are investigated by the first-principles calculations. We predict the maximum adhesion energy of 1.91J/m2 of the TiO2/TiAl interface. We also calculated the Nb doped interface, and found that the doped Nb atom prefers to replace the Ti atom at the second layer of TiAl slab. The atomic geometry and density of states are analyzed. The results show that the effect of doped Nb is localized and insignificant on the TiO2 (110)/TiAl(111) interface.

Controlling of the electronic properties of WS2 and graphene oxide heterostructures from first-principles calculations

2017 ◽  
Vol 5 (1) ◽  
pp. 201-207 ◽  
Author(s):  
Mingye Yang ◽  
Lu Wang ◽  
Tingjun Hou ◽  
Youyong Li
Keyword(s):  
Graphene Oxide ◽  
Work Function ◽  
Band Gap ◽  
Electronic Properties ◽  
Structural Stability ◽  
First Principles ◽  
First Principles Calculations ◽  
Oxide Heterostructures

We investigated the structural stability and electronic properties of WS2 and graphene oxide (GO) heterostructures via first-principles calculations. It is found that the band gap and the work function of the WS2/GO heterostructures can be efficiently tuned by changing the oxygen functionals and its concentrations.

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