Document DOI: 10.1209/epl/i2001-00579-4
Europhys. Lett., 56 (5) , pp. 716-721 (2001)
Quantum-beat recombination echoes
C. Boehme, P. Kanschat and K. LipsHahn-Meitner-Institut Berlin, Abt. SE1 - Kekuléstr. 5, D-12489 Berlin, Germany boehme@hmi.de
(Received 28 May 2001; accepted 12 September 2001)
Abstract
A recombination echo phenomenon of weakly coupled electron-hole pairs
in disordered semiconductors is suggested. The time-domain calculation of
spin-dependent recombination within such pairs indicates
that dephasing beat oscillations can take place in a magnetic field
and a phase recovery due to a resonant microwave pulse is
possible. This effect, which we call the quantum-beat recombination echo,
is illustrated for different pulse sequences. Applications for material
characterisation and quantum computing are suggested.
72.20.Jv - Charge carriers: generation, recombination, lifetime and trapping.
76.60.Lz - Spin echoes.
76.90.+d - Other topics in magnetic resonances and relaxation.
© EDP Sciences 2001