Kagome vanadates {\it A}V3Sb5 display unusual low-temperature electronic properties including charge density waves (CDW), whose microscopic origin remains unsettled. Recently, CDW order has been discovered in a new material ScV6Sn6, providing an opportunity to explore whether the onset of CDW leads to unusual electronic properties. Here, we study this question using angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM). The ARPES measurements show minimal changes to the electronic structure after the onset of CDW. However, STM quasiparticle interference (QPI) measurements show strong dispersing features related to the CDW ordering vectors. A plausible explanation is the presence of a strong momentum-dependent scattering potential peaked at the CDW wavevector, associated with the existence of competing CDW instabilities. Our STM results further indicate that the bands most affected by the CDW are near vHS, analogous to the case of {\it A}V3Sb5 despite very different CDW wavevectors.
@article{arxiv.2406.11212,
title = {Low-Energy Electronic Structure in the Unconventional Charge-Ordered State of ScV$_6$Sn$_6$},
author = {Asish K. Kundu and Xiong Huang and Eric Seewald and Ethan Ritz and Santanu Pakhira and Shuai Zhang and Dihao Sun and Simon Turkel and Sara Shabani and Turgut Yilmaz and Elio Vescovo and Cory R. Dean and David C. Johnston and Tonica Valla and Turan Birol and Dmitri N. Basov and Rafael M. Fernandes and Abhay N. Pasupathy},
journal= {arXiv preprint arXiv:2406.11212},
year = {2024}
}