Vortex phase diagram of kagome superconductor CsV${}_3$Sb${}_5$

Abstract

The screening response of vortices in kagome superconductor CsV${}_3$Sb${}_5$ was measured using the ac mutual inductance technique. Besides confirming the absence of gapless quasiparticles in zero external magnetic field, we observe the peak effect, manifested in enhanced vortex pinning strength and critical current, in a broad intermediate range of magnetic field. The peaks are followed by another crossover from strong to weak pinning, unlike the usual peak effect that diminishes smoothly at $H_{c2}$. Hysteresis in the screening response allows the identification of a vortex glass phase which strongly correlates with the onset of the peaks. A variety of features in the temperature- and field-dependence of the screening response, corroborated by resistance and dc magnetization measurements, have allowed us to extract an $H$-$T$ phase diagram of the vortex states and to infer the irreversibility line $H_{\text{irr}}(T)$.

Main text: 6 pages, 4 figures; supplementary: 10 pages, 8 figures

References in corpus (13)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Theory of Intertwined Orders in High Temperature Superconductors
• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
• Fermi surface mapping and the nature of charge density wave order in the kagome superconductor CsV${}_3$Sb${}_5$
• Kagome superconductors AV${}_3$Sb${}_5$ (A=K, Rb, Cs)
• Multiband superconductivity with sign-preserving order parameter in kagome superconductor CsV3Sb5
• Nodeless superconductivity in the kagome metal CsV${}_3$Sb${}_5$
• Anisotropic superconducting properties of Kagome metal CsV3Sb5
• Microscopic evidence for anisotropic multigap superconductivity in the CsV${}_3$Sb${}_5$ kagome superconductor
• High Resolution Polar Kerr Effect Studies of CsV${}_3$Sb${}_5$: Tests for Time Reversal Symmetry Breaking Below the Charge Order Transition
• Anomalous thermoelectric effects and quantum oscillations in the kagome metal CsV${}_3$Sb${}_5$
• Nodeless superconductivity in kagome metal CsV${}_3$Sb${}_5$ with and without time reversal symmetry breaking

Cited by in corpus (2)

• AV${}_3$Sb${}_5$ Kagome Superconductors: Progress and Future Directions
• Kagome metals