A. Kavokin et al., COLLECTIVE EXCITON MAGNETIC POLARONS IN QUANTUM-WELLS WITH SEMIMAGNETIC BARRIERS, Physical review. B, Condensed matter, 57(8), 1998, pp. 4261-4264
A mechanism for exciton Bose condensation is suggested. We show that t
he interaction of localized exciton magnetic polarons (EMP's) can lead
to the formation of a free collective exciton magnetic polaron (CEMP)
able to move as a whole particle. Critical conditions for this transi
tion and characteristics of the CEMP are found. We interpret the recen
t data on giant magnetic polaron mobility in ZnSe/ZnMnxSe1-x quantum w
ells [G. A. Balchin, C. D. Poweleit, and L. M. Smith, in Proceedings o
f the 23rd International Conference on the Physics of Semiconductors,
edited by M. Scheffler and R. Zimmermann (World Scientific, Singapore
1996), p. 2055] as a manifestation of the free CEMP formation due to c
lusterization of long-living indirect EMP's. [S0163-1829(98)52308-9].