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Updated: Jun 14, 2026
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Intrinsic electronic structure and nanoscale domains in the kagome superconductor KV3Sb5probed by space resolved
Giovanni Tomassucci1, F Minati1, Alexei Victorovich Barinov2
1Dipartimento di Fisica, Università di Roma 'La Sapienza' P. Aldo Moro 2, 00185 Roma, Italy.
Abstract:
We have investigated the intrinsic electronic structure of the KV3Sb5kagome superconductor, which exhibits charge-density-wave (CDW) order, by combining scanning photoelectron microscopy and angle-resolved photoemission spectroscopy using a sub-micron beam. Our findings suggest that in the CDW phase of the system at 30 K percolative paths emerge, while at room temperature the system exhibits homogeneity with suppressed CDW correlations. Despite its inhomogeneous nature, the CDW persists even on the Sb-terminated surface, as evidenced by the Dirac-cone gap associated with2×2CDW fluctuations. These results suggest that KV3Sb5can serve as a model system for exploring emergent quantum phenomena arising from the interplay of topology, strong correlations, and lattice instabilities.
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