Fully Two-Dimensional Incommensurate Charge Modulation on the Pd-Terminated Polar Surface of PdCoO2

Kong P, Li G, Yang Z, Wen C, Qi Y, Felser C, Yan S (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Nano Letters American Chemical Society

Book Volume: 22

Pages Range: 5635-5640

Journal Issue: 14

DOI: 10.1021/acs.nanolett.1c03857

Abstract

Here, we use low-temperature scanning tunneling microscopy and spectroscopy to study the polar surfaces of PdCoO2. On the CoO2-terminated polar surface, we detect the quasiparticle interference pattern originating from the Rashba-like spin-split surface states. On the well-ordered Pd-terminated polar surface, we observe a regular lattice that has a larger lattice constant than the atomic lattice of PdCoO2. In comparison with the shape of the hexagonal Fermi surface on the Pd-terminated surface, we identify this regular lattice as a fully two-dimensional incommensurate charge modulation that is driven by the Fermi surface nesting. More interestingly, we also find the moiré pattern induced by the interference between the two-dimensional incommensurate charge modulation in the Pd layer and its atomic lattice. Our results not only show a new charge modulation on the Pd surface of PdCoO2but also pave the way for fully understanding the novel electronic properties of this material.

Involved external institutions

ShanghaiTech University / 上海科技大学

China (CN) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids

Germany (DE)

How to cite

APA:

Kong, P., Li, G., Yang, Z., Wen, C., Qi, Y., Felser, C., & Yan, S. (2022). Fully Two-Dimensional Incommensurate Charge Modulation on the Pd-Terminated Polar Surface of PdCoO2. Nano Letters, 22(14), 5635-5640. https://doi.org/10.1021/acs.nanolett.1c03857

MLA:

Kong, Pengfei, et al. "Fully Two-Dimensional Incommensurate Charge Modulation on the Pd-Terminated Polar Surface of PdCoO2." Nano Letters 22.14 (2022): 5635-5640.

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