Stuctural Distortions in Kagome Superconductor CsV<sub>3</sub>Sb<sub>5</sub> Investigated with Quantum Oscillations
ORAL
Abstract
The coexistence of superconductivity with an additional order parameter has intrigued our scientific community, showing much interest in the family of Kagome Superconductors AV3Sb5 (A = K, Cs, Rb). In this material family, the role of charge density wave (CDW) order has shown both interplay and competition with superconductivity. Thus, understanding the CDW phase will provide insight into the superconducting pairing mechanism. In this study, we utilize quantum oscillations to map the fermi surface of CsV3Sb5 through the tunnel diode oscillator measurements [1]. While previous studies show the Star of David (SD) and Inverted Star of David (ISD) distortions, our results provide new orbits which cannot be captured by either distortion [1]. This suggests a dramatic renormalization of the Fermi surface due to a complex structural distortion involving interlayer ordering.
*Research at Washington University was supported by McDonnell International Scholars Academy. Research at the National High Magnetic Field Laboratory NHMFL was supported by NSF Cooperative Agreement No. DMR-1644779 and the State of Florida. Research at Chinese Academy of Science is supported by grants from the National Natural Science Foundation of China (61888102, 51771224), the National Key Research and Development Projects of China (2018YFA0305800), and the Chinese Academy of Sciences (XDB33030100).
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Publication: [1] Broyles, C. et al. "Effect of Interlayer Ordering on the Fermi Surface of Kagome Superconductor CsV3Sb5 Revealed by Quantum Oscillations". Phys. Rev. Lett. 129. (2022). 157001.
Presenters
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Christopher Broyles
- Washington University in St. Louis