PHYSICAL REVIEW B

HASS J, FENG R, MILLANOTOYA JE, LI X, SPRINKLE M, FIRST PN, DE HEER WA, CONRAD EH, BERGER C

APPLIED PHYSICS LETTERS

HASS J, FENG R, LI T, LI X, ZONG Z, DE HEER WA, FIRST PN, CONRAD EH, JEFFREY CA, BERGER C