Ground state of excitonic molecules by the Green's-function Monte Carlo method

Journal Article · Mon Dec 26 04:00:00 EST 1983 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.51.2422· OSTI ID:5013655

Lee, M A; Vashishta, P; Kalia, R K

The ground-state energy of excitonic molecules is evaluated as a function of the ratio of electron and hole masses, sigma, with use of the Green's-function Monte Carlo method. For all sigma, the Green's-function Monte Carlo energies are significantly lower than the variational estimates and in favorable agreement with experiments. In excitonic rydbergs, the binding energy of the positronium molecule (sigma = 1) is predicted to be -0.06 and for sigma<<1, the Green's-function Monte Carlo energies agree with the ''exact'' limiting behavior, E = -2.346+0.764sigma.

• Research Organization: Department of Physics, Kent State University, Kent, Ohio 44242
• OSTI ID: 5013655
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 51:26; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640303* -- Atomic
Molecular &amp; Chemical Physics-- Positronium
Muonium
&amp; Muonic &amp; Mesic Atoms &amp; Molecules
74 ATOMIC AND MOLECULAR PHYSICS
BINDING ENERGY
BOUND STATE
CORRECTIONS
EFFECTIVE MASS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
EXCITONS
FERMIONS
FUNCTIONS
GREEN FUNCTION
GROUND STATES
HOLES
LEPTONS
MASS
MONTE CARLO METHOD
POSITRONIUM
QUASI PARTICLES
RYDBERG CORRECTION