Nanoscale visualization and spectral fingerprints of the charge order in ScV6Sn6 distinct from other kagome metals
Abstrak
Abstract Charge density waves (CDWs) in kagome metals have been tied to many exotic phenomena. Here, using spectroscopic-imaging scanning tunneling microscopy and angle-resolved photoemission spectroscopy, we study the charge order in kagome metal ScV6Sn6. The similarity of electronic band structures of ScV6Sn6 and TbV6Sn6 (where charge ordering is absent) suggests that charge ordering in ScV6Sn6 is unlikely to be primarily driven by Fermi surface nesting of the Van Hove singularities. In contrast to the CDW state of cousin kagome metals, we find no evidence supporting rotation symmetry breaking. Differential conductance dI/dV spectra show a partial gap Δ 1 CO ≈ 20 meV at the Fermi level. Interestingly, dI/dV maps reveal that charge modulations exhibit an abrupt phase shift as a function of energy at energy much higher than Δ 1 CO, which we attribute to another spectral gap. Our experiments reveal a distinctive nature of the charge order in ScV6Sn6 with fundamental differences compared to other kagome metals.
Topik & Kata Kunci
Penulis (26)
Siyu Cheng
Zheng Ren
Hong Li
Ji Seop Oh
Hengxin Tan
Ganesh Pokharel
Jonathan M. DeStefano
Elliott Rosenberg
Yucheng Guo
Yichen Zhang
Ziqin Yue
Yongbin Lee
Sergey Gorovikov
Marta Zonno
Makoto Hashimoto
Donghui Lu
Liqin Ke
Federico Mazzola
Junichiro Kono
R. J. Birgeneau
Jiun-Haw Chu
Stephen D. Wilson
Ziqiang Wang
Binghai Yan
Ming Yi
Ilija Zeljkovic
Akses Cepat
- Tahun Terbit
- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1038/s41535-024-00623-9
- Akses
- Open Access ✓