http://www.cnr.it/ontology/cnr/individuo/prodotto/ID130
Computation of the Stark effect in P impurity states in silicon (Articolo in rivista)
- Type
- Label
- Computation of the Stark effect in P impurity states in silicon (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevB.74.035202 (literal)
- Alternative label
Debernardi, A; Baldereschi, A; Fanciulli, M (2006)
Computation of the Stark effect in P impurity states in silicon
in Physical review. B, Condensed matter and materials physics (Online)
(literal)
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- Debernardi, A; Baldereschi, A; Fanciulli, M (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- INFM, CNR, MDM Natl Lab, I-20041 Agrate Brianza, Italy; INFM, Democritos Natl Simulat Ctr, Trieste, Italy; Univ Trieste, Dipartimento Fis Teor, Trieste, Italy; Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland (literal)
- Titolo
- Computation of the Stark effect in P impurity states in silicon (literal)
- Abstract
- We compute within the effective-mass theory and without adjustable parameters the Stark effect for shallow P donors in Si with anisotropic band structure. Valley-orbit coupling is taken into account in a nonperturbative way and scattering effects of the impurity core are included to properly describe low-lying impurity states. The ground-state energy slightly decreases with increasing electric field up to a critical value E-cr similar to 25 keV/cm, at which the donor can be ionized by tunneling due to a field-induced mixing of the '1s-like' singlet ground state with a '2p(0)-like' excited state in zero field. The resulting ground-state wave function at high field extends significantly outside the potential barrier surrounding the impurity. Calculations of the hyperfine splitting and of the A-shell superhyperfine coupling constants as a function of the electric field complete the work. (literal)
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