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Placental teratoma - A case report
(ELSEVIER SCI IRELAND LTD, 1998)
We present a rare case of a placental teratoma found within the fetal membranes of an otherwise normal placenta. Lack of a recognizable umbilical cord and no recognizable skeletal development are used as differential ...
Binding energies of excitons in symmetric and asymmetric quantum wells in a magnetic field
(ACADEMIC PRESS LTD, 1998)
The binding energy of the exciton in the symmetric and asymmetric GaAs/Ga1-xAlxAs quantum wells is calculated with the use of a variational approach. Results have been obtained as a function of the potential symmetry, and ...
Subband structure and excitonic binding of graded GaAs/Ga1-xAlxAs quantum wells under an electric field
(ACADEMIC PRESS LTD, 1998)
The effects of an applied electric field on subband energies and excitonic binding for a graded GaAlAs quantum well are calculated variationally within the effective mass approximation. The very sensitive dependence of ...