scholarly journals Dimensional effects on the density of states in systems with quasi-relativistic dispersion relations and potential wells

2016 ◽  
Vol 94 (8) ◽  
pp. 773-779 ◽  
Author(s):  
A. Pokraka ◽  
R. Dick
Keyword(s):  
Hybrid Systems ◽  
Density Of States ◽  
Three Dimensional ◽  
Dispersion Relations ◽  
Potential Wells ◽  
Dimensional Effects ◽  
Densities Of States ◽  
Relativistic Dispersion ◽  
Low Dimensional

Motivated by the recent discoveries of materials with quasi-relativistic dispersion relations, we determine densities of states in materials with low dimensional substructures and relativistic dispersion relations. We find that these dimensionally hybrid systems yield quasi-relativistic densities of states that are a superposition of the corresponding two- and three-dimensional densities of states.

Density of States for a Three-dimensional Disordered Alloy

1977 ◽  
Vol 32 (3-4) ◽  
pp. 295-298 ◽  
Author(s):  
D. Pumpernik ◽  
B. Borštnik ◽  
M. Kertesz ◽  
A. Ažman
Keyword(s):  
Density Of States ◽  
Binary Alloys ◽  
Three Dimensional ◽  
Negative Eigenvalue ◽  
Densities Of States ◽  
Dimensional Models ◽  
Three Dimensional Models ◽  
Disordered Alloy

Abstract Densities of states for three-dimensional models of binary alloys are calculated with a method based on the negative eigenvalue theorem. Comparison is made with the densities of states obtained by diagonalizations of the Hamiltonian for a certain number of physically different clusters of impurities.

Low-dimensional effects in a three-dimensional system of Si quantum dots modified by high-energy ion irradiation

2009 ◽  
Vol 20 (18) ◽  
pp. 185401 ◽  
Author(s):  
I V Antonova ◽  
A G Cherkov ◽  
V A Skuratov ◽  
M S Kagan ◽  
J Jedrzejewski ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ion Irradiation ◽  
Three Dimensional ◽  
High Energy ◽  
Dimensional System ◽  
Dimensional Effects ◽  
Low Dimensional ◽  
Si Quantum Dots ◽  
Three Dimensional System

scholarly journals CONSTRUCTION OF A DISPERSION RELATION FROM AN ARBITRARY DENSITY OF STATES

2002 ◽  
Vol 16 (23) ◽  
pp. 3491-3501 ◽  
Author(s):  
MARCUS KOLLAR
Keyword(s):  
Dispersion Relation ◽  
Density Of States ◽  
Three Dimensional ◽  
Dispersion Relations ◽  
Band Spectrum ◽  
Spherically Symmetric ◽  
Infinite Dimensions ◽  
Energy Bands ◽  
Band Structures ◽  
Finite Bandwidth

The dispersion relations of energy bands in solids are characterized by their density of states, but a given density of states may originate from various band structures. We show how a spherically symmetric dispersion can be constructed for any one-band density of states. This method is applied to one-, two- and three-dimensional systems. It also serves to establish that any one-band spectrum with finite bandwidth can be obtained from a properly scaled dispersion relation in the limit of infinite dimensions.

Van der Waals Epitaxy of GaSe on GaAs(111)

1994 ◽  
Vol 340 ◽  
Author(s):  
L. E. Rumaner ◽  
F.S. Ohuchi
Keyword(s):  
Lattice Mismatch ◽  
Van Der Waals ◽  
Three Dimensional ◽  
Structured Materials ◽  
Lattice Matching ◽  
Molecular Beam Deposition ◽  
Crystal Films ◽  
Low Dimensional ◽  
Matching Constraints ◽  
Lattice Matched

ABSTRACTAlthough heteroepitaxy of lattice-matched and lattice-mismatched materials leading to artificially structured materials has resulted in impressive performance in various electronics devices, material combinations are usually limited by lattice matching constraints. A new concept for fabricating material systems using the atomically abrupt and low dimensional nature of layered materials, called van der Waals epitaxy (VDWE), has been developed. GaSe (Eg = 2.1 eV) has been deposited on the three dimensional surface of GaAs (111) using a molecular beam deposition system. GaSe was evaporated from a single Knudsen source, impinging on a heated substrate. Even with a lattice mismatch of 6% between the substrate and the growing film, good quality single crystal films were grown as determined by RHEED. The films have further been analyzed using a complementary combination of XPS and X-ray reflectivity.

scholarly journals Three-Dimensional Macroscopic Assemblies of Low-Dimensional Carbon Nitrides for Enhanced Hydrogen Evolution

2013 ◽  
Vol 125 (42) ◽  
pp. 11289-11293 ◽  
Author(s):  
Young-Si Jun ◽  
Jihee Park ◽  
Sun Uk Lee ◽  
Arne Thomas ◽  
Won Hi Hong ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Three Dimensional ◽  
Carbon Nitrides ◽  
Low Dimensional

Local Density of States of a Three-Dimensional Conductor in the Extreme Quantum Limit

2001 ◽  
Vol 86 (8) ◽  
pp. 1582-1585 ◽  
Author(s):  
D. Haude ◽  
M. Morgenstern ◽  
I. Meinel ◽  
R. Wiesendanger
Keyword(s):  
Density Of States ◽  
Local Density ◽  
Three Dimensional ◽  
Quantum Limit ◽  
Local Density Of States
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