title: Room-temperature ferromagnetism and terahertz emission of Mn-doped InGaAs and GaAsSb nanowires.
abstract: Ferromagnetic Mn-doped In(0.05)Ga(0.95)As and GaAs(0.95)Sb(0.05) nanowires were synthesized by chemical vapor transport and their Mn concentration was about 2%. The Mn doped homogeneously into both the single-crystalline zinc blende InGaAs and GaAsSb without the formation of metal clusters. X-ray magnetic circular dichroism and magnetic moment measurements revealed their distinctive room-temperature ferromagnetic behaviors. While the incorporation of In enhances the ferromagnetism, that of Sb reduces it, which can be ascribed to the increase or decrease of the dopant-acceptor hybridization. These GaAs-based NWs exhibit an efficient terahertz emission at room temperature, due to a strong local field enhancement by coherent surface plasmons. The Mn doping significantly enhances the intensity and bandwidth of the terahertz emission, with an excellent correlation with their magnetization.
authors.affiliation: Department of Chemistry, Korea University, Jochiwon, Korea.
authors.forename: Kang Jun
authors.initials: KJ
authors.lastname: Kong
authors.forename: Chan Su
authors.initials: CS
authors.lastname: Jung
authors.forename: Gyeong Bok
authors.initials: GB
authors.lastname: Jung
authors.forename: Yong Jae
authors.initials: YJ
authors.lastname: Cho
authors.forename: Han Sung
authors.initials: HS
authors.lastname: Kim
authors.forename: Jeunghee
authors.initials: J
authors.lastname: Park
authors.forename: Nan Ei
authors.initials: NE
authors.lastname: Yu
authors.forename: Chul
authors.initials: C
authors.lastname: Kang