Details

Autor(en) / Beteiligte

• Tanaka, Hiroaki
• Okazaki, Shota
• Kobayashi, Masaru
• Fukushima, Yuto
• Arai, Yosuke
• Iimori, Takushi
• Lippmaa, Mikk
• Yamagami, Kohei
• Kotani, Yoshinori
• Komori, Fumio
• Kuroda, Kenta
• Sasagawa, Takao
• Kondo, Takeshi

Titel

Broken Screw Rotational Symmetry in the Near-Surface Electronic Structure of AB-Stacked Crystals

Ist Teil von

• Physical review letters, 2024-03, Vol.132 (13), p.136402-136402

Ort / Verlag

United States

Erscheinungsjahr

2024

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We investigate the electronic structure of 2H-NbS_{2} and h-BN by angle-resolved photoemission spectroscopy (ARPES) and photoemission intensity calculations. Although in bulk form, these materials are expected to exhibit band degeneracy in the k_{z}=π/c plane due to screw rotation and time-reversal symmetries, we observe gapped band dispersion near the surface. We extract from first-principles calculations the near-surface electronic structure probed by ARPES and find that the calculated photoemission spectra from the near-surface region reproduce the gapped ARPES spectra. Our results show that the near-surface electronic structure can be qualitatively different from the bulk electronic structure due to partially broken nonsymmorphic symmetries.