Artificial ferroelectricity in coupled strained quantum dots

摘要

A multiple quantum dot structure consisting of alternating strained and unstrained quantum dots and having nonzero net dipole moment, i.e., possessing ferroelectric properties, is proposed. Curie temperature and spontaneous polariZation are estimated to be of the order of 20 K and 10↑(-5) C/m↑(2). respectively, for the case of InGaAs quantum dots grown on InP substrate and are shown to be insensitive to the lateral arrangement, of the dots. Practical applications in information processing and storage are considered. # 1998 American Institute of Physics. S0003-6951(98)00247-2