scholarly journals Orientation-dependent magnetism and orbital structure of strained YTiO3 films on LaAlO3 substrates

2015 ◽  
Vol 117 (17) ◽  
pp. 17C703 ◽  
Author(s):  
Xin Huang ◽  
Qingyu Xu ◽  
Shuai Dong
Keyword(s):  
Orbital Structure

scholarly journals Molecular-Orbital Structure in Light Neutron-Rich Nuclei

2001 ◽  
Vol 142 ◽  
pp. 297-323 ◽  
Author(s):  
Naoyuki Itagaki ◽  
Shigeto Okabe ◽  
Kiyomi Ikeda
Keyword(s):  
Molecular Orbital ◽  
Orbital Structure

scholarly journals Evolution of the Kuiper Belt during the Accretion of the Outer Planets

2002 ◽  
Vol 12 ◽  
pp. 214-218
Author(s):  
A. Brunini ◽  
M.D. Melita
Keyword(s):  
Kuiper Belt ◽  
Resonance Capture ◽  
Orbital Structure ◽  
Outer Planets ◽  
Self Consistent ◽  
The Impact ◽  
Outward Migration

AbstractA set of self-consistent simulations of the formation of Uranus and Neptune are performed to study the evolution of the native KBOs in the process. Our main goal is to have a deeper understanding of the impact of the formation of the outer planets on the present orbital structure of the trans-neptunian region. We aim to understand if resonance capture driven by the outward migration of Neptune can actually occur and its interplay with the invasion of massive planetesimals expelled from the Uranus-Neptune region as a byproduct of their formation. Also the putative present existence in the Oort reservoir of a population of objects originated in the Kuiper belt is analyzed.

scholarly journals Probing Orbital Structure of Polyatomic Molecules by High-Order Harmonic Generation

2007 ◽  
Vol 98 (20) ◽  
Author(s):  
R. Torres ◽  
N. Kajumba ◽  
Jonathan G. Underwood ◽  
J. S. Robinson ◽  
S. Baker ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Polyatomic Molecules ◽  
High Order ◽  
Orbital Structure ◽  
High Order Harmonic Generation ◽  
High Order Harmonic

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.

scholarly journals Anomalous orbital structure in a spinel–perovskite interface

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Yanwei Cao ◽  
Xiaoran Liu ◽  
Padraic Shafer ◽  
Srimanta Middey ◽  
Derek Meyers ◽  
...  
Keyword(s):  
Orbital Structure

scholarly journals Modelling of ‘sub-atomic’ contrast resulting from back-bonding on Si(111)-7×7

2016 ◽  
Vol 7 ◽  
pp. 937-945 ◽  
Author(s):  
Adam Sweetman ◽  
Samuel P Jarvis ◽  
Mohammad A Rashid
Keyword(s):  
Simple Model ◽  
Experimental Results ◽  
Striking Similarity ◽  
Orbital Structure ◽  
Dangling Bond ◽  
Lennard Jones ◽  
Detailed Explanation ◽  
Afm Imaging ◽  
Back Bonding ◽  
Molecular Contrast

It has recently been shown that ‘sub-atomic’ contrast can be observed during NC-AFM imaging of the Si(111)-7×7 substrate with a passivated tip, resulting in triangular shaped atoms [Sweetman et al. Nano Lett. 2014, 14, 2265]. The symmetry of the features, and the well-established nature of the dangling bond structure of the silicon adatom means that in this instance the contrast cannot arise from the orbital structure of the atoms, and it was suggested by simple symmetry arguments that the contrast could only arise from the backbonding symmetry of the surface adatoms. However, no modelling of the system has been performed in order to understand the precise origin of the contrast. In this paper we provide a detailed explanation for ‘sub-atomic’ contrast observed on Si(111)-7×7 using a simple model based on Lennard-Jones potentials, coupled with a flexible tip, as proposed by Hapala et al. [Phys. Rev. B 2014, 90, 085421] in the context of interpreting sub-molecular contrast. Our results show a striking similarity to experimental results, and demonstrate how ‘sub-atomic’ contrast can arise from a flexible tip exploring an asymmetric potential created due to the positioning of the surrounding surface atoms.

scholarly journals Growth and interaction of planets

2004 ◽  
Vol 202 ◽  
pp. 149-158 ◽  
Author(s):  
Pawel Artymowicz
Keyword(s):  
Planetary Systems ◽  
Giant Planets ◽  
The Sun ◽  
Orbital Structure ◽  
Origin And Evolution ◽  
Elliptic Orbits ◽  
Observational Techniques

We discuss theories of origin and evolution of the newly discovered extrasolar planetary systems. As these systems failed to fulfill prior expectations concerning their orbital structure, we are challenged to extend and/or revise many preexisting theories. Important extensions include migration of bodies in disks and planetary eccentricity pumping by planet-planet interaction and primordial disk-planet interaction. Progress in observational techniques will allow us to find which of these two types of interaction is responsible for the observed variety of orbits and masses of planets. New insights into the formation of giant planets in our system can be obtained by asking why Jupiter and Saturn are not larger, closer to the sun and/or do not follow noticeably elliptic orbits.

scholarly journals Models of bars − II. Exponential profiles

2020 ◽  
Vol 493 (2) ◽  
pp. 2676-2687 ◽  
Author(s):  
D P McGough ◽  
N W Evans ◽  
J L Sanders
Keyword(s):  
Cross Sections ◽  
High Velocity ◽  
Dominant Role ◽  
Gaussian Quadrature ◽  
Major Axis ◽  
Orbital Structure ◽  
Linear Superposition ◽  
Lagrange Points ◽  
Gaussian Potential ◽  
First Time

ABSTRACT We present a new model for galactic bars with exponentially falling major axis luminosity profiles and Gaussian cross-sections. This is based on the linear superposition of Gaussian potential–density pairs with an exponential weight function, using an extension of the method originally introduced by Long & Murali. We compute the density, potential, and forces, using Gaussian quadrature. These quantities are given as explicit functions of position. There are three independent scaled bar parameters that can be varied continuously to produce bespoke bars of a given mass and shape. We categorize the effective potential by splitting a reduced parameter space into six regions. Unusually, we find bars with three stable Lagrange points on the major axis are possible. Our model reveals a variety of unexpected orbital structure, including a bifurcating x1 orbit coexisting with a stable x4 orbit. Propeller orbits are found to play a dominant role in the orbital structure, and we find striking similarities between our bar configuration and the model of Kaufmann & Contopoulos. We find a candidate orbital family, sired from the propeller orbits, that may be responsible for the observed high-velocity peaks in the Milky Way’s bar. As a cross-check, we inspect, for the first time, the proper motions of stars in the high-velocity peaks, which also match our suggested orbital family well. This work adds to the increasing body of evidence that real galactic bars may be supported at least partly by propeller orbits rather than solely by elliptical-like orbits of the x1 family.

Sign in / Sign up

Export Citation Format

Share Document