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Ground-state study ...
Abstract
Ämnesord
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- A donor-acceptor model with randomly distributed N donor and N acceptor sites and with finite charge transfer energy Delta is investigated at zero temperature by means of computer simulations on two-dimensional samples of different sizes, We demonstrate that the density of one-electron excitations g(epsilon) for accepters in the vicinity of the Fermi energy mu depends essentially on the size of the sample investigated and that g(epsilon) further away from mu exhibits a size-independent power-law with the non-universal exponent decreasing with increasing Delta. Rigorous relations for mu and for the mapping of g(epsilon) for donors into g(epsilon) for accepters are also given.
Nyckelord
- coulomb gap
- disordered systems
- si-b
- semiconductor
- simulation
- glass
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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