Magnetoreflection of the lowest exciton in a layered perovskite-type compound (C10H21NH3)2PbI4

M. Hirasawa, T. Ishihara, T. Goto, S. Sasaki, K. Uchida, N. Miura

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Abstract

Magnetoreflection spectra in the Faraday configuration have been investigated up to 40 T at 4.2K for a single crystal of (C10H21NH3)2PbI4, which consists of two-dimensional networks of corner-sharing octahedra [PbI6]4-. The Zeeman shift is observed, and the effective g-factor is 1.42±0.04. The observed diamagnetic shift of the lowest exciton is (7 ± 4) x 10-8eV/T2, from which the two-dimensional Bohr radius is estimated to be 7 Å at most. It suggests that the exciton wave function extends only to the 4 nearest neighbor octahedra [PbI6]4- in the two-dimensional layer. By referring to the resonant Raman scattering spectra and reflection spectra of strained single crystals, a few narrow dips in high reflectivity region of the lowest exciton are ascribed to the vibronic excitons.

Original languageEnglish
Pages (from-to)479-483
Number of pages5
JournalSolid State Communications
Volume86
Issue number8
DOIs
Publication statusPublished - 1993 May

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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