Universidade de São Paulo, Instituto de Física Address:São Paulo, Brazil Phone:+55 (11) 3814 0503 Fax:+55 (11) 3814 0503 Website:www.if.usp.br Email:if@edu.usp.br
Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences Address:prosp. Lavrent'eva 13, Novosibirsk, 630090, Russian Federation Phone:+7 (383) 333 27 66 Fax:+7 (383) 333 27 71 Website:www.isp.nsc.ru Email:ifp@isp.nsc.ru