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arXiv · 1611.08406

Comment on "Quasi-One-Dimensional Metal-Insulator Transitions in Compound Semiconductor Surfaces"

Sun-Woo Kim·Yoon-Gu Kang·Hyun-Jung Kim·Jun-Hyung Cho
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Abstract

In a recent Letter, Zhao et al. [1] reported the origin of quasi-one-dimensional metal-insulator (MI) transitions in compound semiconductor surfaces. Based on a density-functional theory (DFT) calculation within the generalized gradient approximation (GGA), they claimed that one-atom-wide metallic structures formed by a selective bonding of H or Li atoms to GaN(10-10) and ZnO(10-10) undergo the Peierls-type MI transitions, leading to a charge-density-wave (CDW) formation with periodic lattice distortion. However, we here demonstrate that such a CDW phase is due to the artifact of the GGA, while the antiferromagnetic (AFM) ground state is predicted by the hybrid DFT calculation and the exact-exchange plus correlation in the random-phase approximation (EX + cRPA). [1] J. Z. Zhao, W. Fan, M. J. Verstraete, Z. Zanolli, J. Fan, X. B. Yang, H. Xu, and S. Y. Tong, Phys. Rev. Lett. 117, 116101 (2016).

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Sun-Woo Kim, Yoon-Gu Kang, Hyun-Jung Kim, Jun-Hyung Cho. 2017-05-10. Comment on "Quasi-One-Dimensional Metal-Insulator Transitions in Compound Semiconductor Surfaces". https://doi.org/10.1103/physrevlett.118.239601

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