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    題名: Atomically thin metallic Si and Ge allotropes with high Fermi velocities
    作者: Hsu, Chin-En;Lee, Yung-Ting;Wang, Chieh-Chun;Lin, Chang-Yu;Yukiko, Yamada-Takamura;Ozaki, Taisuke;Lee, Chi-Cheng
    日期: 2023-03-09
    上傳時間: 2023-04-28 17:46:51 (UTC+8)
    出版者: American Physical Society
    摘要: Silicon and germanium are well-known materials used to manufacture electronic devices for integrated circuits, but they themselves are not considered as promising options for interconnecting the devices due to their semiconducting nature. We have discovered that both Si and Ge atoms can form unexpected metallic monolayer structures with a square lattice which are more stable than the semimetallic silicene and germanene, respectively, in line with the energetically more favored dumbbell and wavy-bilayer structures. More importantly, these two-dimensional allotropes of Si and Ge host Dirac fermions with Fermi velocities superior to those in graphene, indicating that the metal wires needed in the silicon-based integrated circuits can be made of the Si atom itself without incompatibility, allowing for all-silicon-based integrated circuits.
    關聯: Phys. Rev. B 107, 115410
    DOI: 10.1103/PhysRevB.107.115410
    顯示於類別:[物理學系暨研究所] 期刊論文

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