Quantum oscillations in kagome metals <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>CsTi</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi>Bi</mml:mi></mml:mrow><mml:mn>5</mml:mn></mml:msub></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>RbTi</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi>Bi</mml:mi></mml:mrow><mml:mn>5</mml:mn></mml:msub></mml:math>
Zackary Rehfuss, Christopher Broyles, David Graf, Yongkang Li, Hengxin Tan, Zhen Zhao, Jiali Liu, Yuhang Zhang, Xiaoli Dong, Haitao Yang, Hongjun Gao, Binghai Yan, Sheng Ran
Abstract
We explore quantum oscillations in the kagome metals CsTi${}_{3}$Bi${}_{5}$ and RbTi${}_{3}$Bi${}_{5}$, using high magnetic fields and low temperatures. We reveal new quantum oscillation frequencies in CsTi${}_{3}$Bi${}_{5}$, showing a complex Fermi surface that matches density functional theory predictions. Interestingly, the Rb compound exhibits notably different results from the Cs compound, despite theoretical expectations of similarity. This work deepens our understanding of the electronic intricacies within kagome lattice systems and spotlights their role as a playground for unearthing novel quantum states. Our findings pave the way for future investigations in the quantum behaviors of kagome metals, offering insights for advanced material development.