Park, Kidong Jung, Minkyung Kim, Doyeon Bayogan, Janice Ruth Lee, Jong Hyun An, Sung Jin Seo, Jungpil Seo, Jaemin Ahn, Jae-Pyoung Park, Jeunghee 2024-01-19T17:03:50Z 2024-01-19T17:03:50Z 2022-01-25 2020-07 1530-6984 https://pubs.kist.re.kr/handle/201004/118419 The bottom-up synthesis process often allows the growth of metastable phase nanowires instead of the thermodynamically stable phase. Herein, we synthesized Cd3As2 nanowires with a controlled three-dimensional Dirac semimetal phase using a chemical vapor transport method. Three different phases such as the body centered tetragonal (bct), and two metastable primitive tetragonal (P4(2)/nbc and P4(2)/nmc) phases were identified. The conversion between three phases (bct -> P4(2)/nbc -> P4(2)/nmc) was achieved by increasing the growth temperature. The growth direction is [1 (1) over bar0] for bct and P4(2)/nbc and [100] for P4(2)/nmc, corresponding to the same crystallographic axis. Field effect transistors and photodetector devices showed the nearly same electrical and photoelectrical properties for three phases. Differential conductance measurement confirms excellent electron mobility (2 x 10(4) cm(2)/(V s) at 10 K). Negative photoconductance was first observed, and the photoresponsivity reached 3 x 10(4) A/W, which is ascribed to the surface defects acting as trap sites for the photogenerated electrons. English AMER CHEMICAL SOC Phase Controlled Growth of Cd3As2 Nanowires and Their Negative Photoconductivity Article 10.1021/acs.nanolett.0c01010 1 NANO LETTERS, v.20, no.7, pp.4939 - 4946 NANO LETTERS 20 7 4939 4946 N scie scopus 000548893200032 2-s2.0-85088206867 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article SEMIMETAL MAGNETORESISTANCE TRANSPORT MOBILITY CRYSTAL SINGLE Cadmium arsenide nanowires Dirac semimetal body centered tetragonal phase primitive tetragonal phase photoconductivity