Electronic band structure of surface-doped black phosphorus

Jimin Kim, Minjae Huh, Sung Won Jung, Sae Hee Ryu, Yeongsup Sohn, Keun Su Kim

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4 Citations (Scopus)

Abstract

We present an overview on the electronic band structure of surface-doped black phosphorus. Angle-resolved photoemission spectroscopy data show that the in situ deposition of potassium atoms on the surface of single-crystalline black phosphorus modulates the band gap in the wide range of 0.0–0.6 eV. At zero band gap, the surface layers of black phosphorus become a Dirac semimetal whose band dispersion is highly anisotropic, linear in armchair and quadratic in zigzag directions. In light of theoretical band calculations, we elucidate the mechanism of these band modifications as the giant Stark effect due to strong vertical electric fields induced by potassium atoms.

Original languageEnglish
Pages (from-to)86-91
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume219
DOIs
Publication statusPublished - 2017 Aug 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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