Relativistic effects on the surface electronic structure of Cu(001): Observation of a spin-orbit-gap surface state

1986 ◽  
Vol 33 (6) ◽  
pp. 4373-4375 ◽  
Author(s):  
P. L. Wincott ◽  
N. B. Brookes ◽  
D. S. -L. Law ◽  
G. Thornton
Keyword(s):  
Electronic Structure ◽  
Surface State ◽  
Relativistic Effects ◽  
Spin Orbit ◽  
Surface Electronic Structure

CHANGES INDUCED IN THE SURFACE ELECTRONIC STRUCTURE OF Be(0001) AFTER Si ADSORPTION

2002 ◽  
Vol 09 (02) ◽  
pp. 687-691
Author(s):  
L. I. JOHANSSON ◽  
C. VIROJANADARA ◽  
T. BALASUBRAMANIAN
Keyword(s):  
Electronic Structure ◽  
Band Structure ◽  
Band Gap ◽  
Electronic Properties ◽  
Surface State ◽  
Core Level ◽  
Clean Surface ◽  
Core Level Spectrum ◽  
Surface Band ◽  
Surface Electronic Structure

A study of effects induced in the Be 1s core level spectrum and in the surface band structure after Si adsorption on Be(0001) is reported. The changes in the Be 1s spectrum are quite dramatic. The number of resolvable surface components and the magnitude of the shifts do decrease and the relative intensities of the shifted components are drastically different compared to the clean surface. The surface band structure is also strongly affected after Si adsorption and annealing. At [Formula: see text] the surface state is found to move down from 2.8 to 4.1 eV. The band also splits at around 0.5 Å-1 along both the [Formula: see text] and [Formula: see text] directions. At [Formula: see text] and beyond [Formula: see text] only one surface state is observed in the band gap instead of the two for the clean surface. Our findings indicate that a fairly small amount of Si in the outer atomic layers strongly modifies the electronic properties of these layers.

Relativistic effects on the surface electronic structure of Mo(011)

1988 ◽  
Vol 38 (15) ◽  
pp. 10302-10312 ◽  
Author(s):  
K. Jeong ◽  
R. H. Gaylord ◽  
S. D. Kevan
Keyword(s):  
Electronic Structure ◽  
Relativistic Effects ◽  
Surface Electronic Structure

scholarly journals Surface state tunable energy and mass renormalization from homothetic quantum dot arrays

Nanoscale ◽  
2019 ◽  
Vol 11 (48) ◽  
pp. 23132-23138 ◽  
Author(s):  
Ignacio Piquero-Zulaica ◽  
Jun Li ◽  
Zakaria M. Abd El-Fattah ◽  
Leonid Solianyk ◽  
Iker Gallardo ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Quantum Dot ◽  
Surface State ◽  
The State ◽  
Mass Renormalization ◽  
Electron Confinement ◽  
Surface Electronic Structure ◽  
Metal Organic ◽  
Organic Networks

The surface electronic structure is engineered by means of metal–organic networks. We show that on top of electron confinement phenomena, the energy of the state can be controlled via the adatom coordination density.

Photoemission Study of The Electronic Structure of Wurtzite Gan(0001) Surfaces

1997 ◽  
Vol 482 ◽  
Author(s):  
Kevin E. Smith ◽  
Sarnjeet S. Dhesi ◽  
Cristian B. Stagarescu ◽  
James Downes ◽  
D. Doppalapudi ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Valence Band ◽  
Surface State ◽  
High Vacuum ◽  
Valence Band Maximum ◽  
Ultra High Vacuum ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Surface Electronic Structure ◽  
Bond State ◽  
Photoemission Study

AbstractThe surface electronic structure of wurtzite GaN (0001) (1 × 1) has been investigated using angle-resolved photoemission spectroscopy. Surfaces were cleaned by repeated cycles of N2 ion bombardment and annealing in ultra-high vacuum. A well-defined surface state below the top of the valence band is clearly observed. This state is sensitive to the adsorption of both activated H2 and O2, and exists in a projected bulk band gap, below the valence band maximum. The state shows no dispersion perpendicular or parallel to the surface. The symmetry of this surface state is even with respect to the mirror planes of the surface and polarization measurements indicate that it is of spz character, consistent with a dangling bond state.

From Schrödinger to Einstein and Dirac: Relativistic Effects

2020 ◽  
pp. 555-592
Author(s):  
Jochen Autschbach
Keyword(s):  
Electronic Structure ◽  
Dirac Equation ◽  
Quantum Chemical ◽  
Relativistic Quantum ◽  
Heavy Atom ◽  
Relativistic Effects ◽  
Spin Orbit ◽  
Leading Order ◽  
Change Effect ◽  
Relativistic Quantum Chemistry

The implications of Einstein’s special relativity in chemistry are discussed. It is shown that relativistic effects on the electronic structure of an atom or molecule scales in leading order as Z2, where Z is the charge number of the heaviest nucleus in the system. Well-known heavy atom effects in chemistry are discussed: The color of gold, the liquid state of mercury, the inert pair effect of heavy p-block elements, and more. Spin-orbit coupling (SOC) is also a relativistic effect and plays a big role in spectroscopy and chemistry. The Dirac equation (DE) replaces the electronic Schrodinger equation in relativistic quantum chemistry. The Dirac wavefunctions have 4 components. It is shown how an ‘exact 2-component’ (X2C) Hamiltonian can be constructed. X2C based all-electron calculations are becoming increasingly popular in quantum chemical applications. Molecular properties may undergo a picture-change effect when going from a 4-component to a 2-component framework.

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