Electronic Topological Transition of 2D Boron by the Ion Exchange Reaction

Xiaoni Zhang, Yuki Tsujikawa, Ikuma Tateishi, Masahito Niibe, Tetsuya Wada, Masafumi Horio, Miwa Hikichi, Yasunobu Ando, Kunio Yubuta, Takahiro Kondo, Iwao Matsuda

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We systematically investigated electronic evolutions of nonsymmorphic borophene with chemical environments that were realized by the ion exchange method. Electronic structures can be characterized by the topological Z2 invariant. Spectroscopic experiments and DFT calculations unveiled that a sheet of hydrogenated borophene (borophane) is the Dirac nodal loop semimetal (Z2=-1), while a layered crystal of YCrB4is an insulator (Z2=1). The results demonstrate the electronic topological transition by replacement of the counter atoms on the nonsymmorphic borophene layer.

Original languageEnglish
Pages (from-to)12802-12808
Number of pages7
JournalJournal of Physical Chemistry C
Issue number30
Publication statusPublished - Aug 4 2022

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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