Jahn-Teller splitting and Zeeman effect of acceptors in diamond

Employing the high resolution of a 5 + 4 tandem Fabry-Perot interferometer, we discovered that Delta', the Raman active electronic transition between the spin-orbit split 1s(p(3/2)): Gamma(8) and 1s(p(1/2)): Gamma(7) acceptor ground states, is a doubler for a boron impurity in diamond with a clearly resolved spacing of 0.81 +/- 0.15cm(-1). The direct observation of a Stoke s/anti-Stokes pair with 0.80 +/- 0.04 cm(-1) shift provides a striking conf irmation that the lower 1s(p(3/2)): Gamma(8) ground state has experienced a splitting due to a static Jahn-Teller distortion. The Zeeman effect of Del ta' has been investigated with a magnetic field along several crystallograp hic directions. Theory of the Zeeman effect, formulated in terms of the sym metry of the substitutional acceptor and the Luttinger parameters of the va lence band, allows quantitative predictions of the relative intensities of the Zeeman components in full agreement with experiments. The observation o f transitions within the Gamma(8) Zeeman multiplet, i.e., the Raman-electro n-paramagnetic-resonances, is yet another novel feature to emerge from the present study. The investigation has also yielded g-factors characterizing the Zeeman multiplets. (C) 1999 Elsevier Science B.V. All rights reserved.