Scanning tunneling spectroscopy with superconducting tips of Al
I. Guillamon, H. Suderow, S. Vieira, P. Rodiere
TL;DR
This paper demonstrates advanced scanning tunneling spectroscopy using superconducting Al tips at ultra-low temperatures, revealing atomic, charge density wave, and vortex properties of 2HNbSe2 with high spatial resolution.
Contribution
It introduces the use of superconducting Al tips for detailed STM spectroscopy at 0.1 K, enabling new insights into local magnetic fields and electronic structures.
Findings
Atomic lattice and charge density wave observed at 0.1 K
Vortex electronic surface properties precisely resolved
Tip density of states influenced by local magnetic fields
Abstract
We present Scanning Tunneling Spectroscopy measurements at 0.1 K using tips made of Al. At zero field, the atomic lattice and charge density wave of 2HNbSe2 are observed, and under magnetic fields the peculiar electronic surface properties of vortices are precisely resolved. The tip density of states is influenced by the local magnetic field of the vortex, providing for a new probe of the magnetic field at nanometric sizes.
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