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Nonlinear Zeeman Splitting of the Si:Be − s Acceptor Ground State: Influence of the p 1/2 Split‐Off Valence Band?
Author(s) -
Schroth H.,
Lassmann K.,
Borgmann Chr.,
Bracht H.
Publication year - 1998
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199812)210:2<747::aid-pssb747>3.0.co;2-5
Subject(s) - zeeman effect , ground state , atomic physics , acceptor , physics , valence (chemistry) , spectral line , hamiltonian (control theory) , dipole , condensed matter physics , chemistry , magnetic field , quantum mechanics , mathematical optimization , mathematics
Electric‐dipole spin resonance (EDSR) spectra at 24, 34, and 60 GHz of Si:Be show six absorption lines with characteristics similar to those previously observed for the Γ + 8 ground state of group‐III single acceptors. From the dependence on Fermi level position we attribute these absorptions to the singly ionized substitutional double acceptor Be − s . The observed strong nonlinearity of the Zeeman splitting can be approximately described by a Hamiltonian containing terms up to second order in the magnetic field. A much better description is achieved by including the interaction with the Γ + 7 state derived from the split‐off valence band, if one assumes that it lies only about 0.6 meV above the ground state.