Comparison of hydrodynamic and Dirac models of dispersion interaction between graphene and H, He*, or Na atoms
- North-West Technical University, Millionnaya Street 5, St. Petersburg 191065 (Russian Federation)
The van der Waals and Casimir-Polder interaction of different atoms with graphene is investigated using the Dirac model which assumes that the energy of quasiparticles is linear with respect to the momentum. The obtained results for the van der Waals coefficients of hydrogen atoms and molecules and atoms of metastable He* and Na as a function of separation are compared with respective results found using the hydrodynamic model of graphene. It is shown that, regardless of the value of the gap parameter, the Dirac model leads to much smaller values of the van der Waals coefficients than the hydrodynamic model. The experiment on quantum reflection of metastable He* and Na atoms on graphene is proposed which is capable to discriminate between the two models of the electronic structure of graphene. In this respect, the parameters of the phenomenological potential for both these atoms interacting with graphene described by different models are determined.
- OSTI ID:
- 21421466
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 16; Other Information: DOI: 10.1103/PhysRevB.82.165433; (c) 2010 The American Physical Society; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Long-range potentials, including retardation, for the interaction of two alkali-metal atoms
Two and three-body interatomic dispersion energy contributions to binding in molecules and solids.
Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
CARBON
CASIMIR EFFECT
COMPARATIVE EVALUATIONS
DISPERSIONS
ELECTRONIC STRUCTURE
HELIUM
HONEYCOMB STRUCTURES
HYDRODYNAMIC MODEL
HYDROGEN
INTERACTIONS
MOLECULES
QUASI PARTICLES
REFLECTION
SODIUM
VAN DER WAALS FORCES
ALKALI METALS
ELEMENTS
EVALUATION
FLUIDS
GASES
MATHEMATICAL MODELS
MECHANICAL STRUCTURES
METALS
NONMETALS
PARTICLE MODELS
RARE GASES
STATISTICAL MODELS
THERMODYNAMIC MODEL