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Two-dimensional chiral perovskites with large spin Hall angle and collinear spin Hall conductivity.
Abdelwahab, Ibrahim; Kumar, Dushyant; Bian, Tieyuan; Zheng, Haining; Gao, Heng; Hu, Fanrui; McClelland, Arthur; Leng, Kai; Wilson, William L; Yin, Jun; Yang, Hyunsoo; Loh, Kian Ping.
Afiliación
  • Abdelwahab I; Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
  • Kumar D; Center for Nanoscale Systems, Harvard University, Cambridge, MA 02138, USA.
  • Bian T; Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore.
  • Zheng H; Department of Physics, Netaji Subhas University of Technology (NSUT), Dwarka, New Delhi 110078, India.
  • Gao H; Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
  • Hu F; Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
  • McClelland A; Department of Physics, Shanghai University, Shanghai 200444, China.
  • Leng K; Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore.
  • Wilson WL; Center for Nanoscale Systems, Harvard University, Cambridge, MA 02138, USA.
  • Yin J; Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
  • Yang H; Center for Nanoscale Systems, Harvard University, Cambridge, MA 02138, USA.
  • Loh KP; Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
Science ; 385(6706): 311-317, 2024 Jul 19.
Article en En | MEDLINE | ID: mdl-39024425
ABSTRACT
Two-dimensional hybrid organic-inorganic perovskites with chiral spin texture are emergent spin-optoelectronic materials. Despite the wealth of chiro-optical studies on these materials, their charge-to-spin conversion efficiency is unknown. We demonstrate highly efficient electrically driven charge-to-spin conversion in enantiopure chiral perovskites (R/S-MB)2(MA)3Pb4I13 (〈n〉 = 4), where MB is 2-methylbutylamine, MA is methylamine, Pb is lead, and I is iodine. Using scanning photovoltage microscopy, we measured a spin Hall angle θsh of 5% and a spin lifetime of ~75 picoseconds at room temperature in 〈n〉 = 4 chiral perovskites, which is much larger than its racemic counterpart as well as the lower 〈n〉 homologs. In addition to current-induced transverse spin current, the presence of a coexisting out-of-plane spin current confirms that both conventional and collinear spin Hall conductivities exist in these low-dimensional crystals.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2024 Tipo del documento: Article País de afiliación: Singapur Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2024 Tipo del documento: Article País de afiliación: Singapur Pais de publicación: Estados Unidos