A very low temperature STM for the local spectroscopy of mesoscopic structures

Abstract

We present the design and operation of a very-low temperature Scanning Tunneling Microscope (STM) working at $60mK$ in a dilution refrigerator. The STM features both atomic resolution and micron-sized scanning range at low temperature. This work is the first experimental realization of a local spectroscopy of mesoscopic structures at very low temperature. We present high-resolution current-voltage characteristics of tunnel contacts and the deduced local density of states of hybrid Superconductor-Normal metal systems.

5 pages, 5 figures, slightly corrected version

Cited by in corpus (31)

• Opportunities for mesoscopics in thermometry and refrigeration: Physics and applications
• Scanning tunneling spectroscopy of high-temperature superconductors
• Imaging superconducting vortex core and lattice with the scanning tunneling microscope
• Josephson effect in double-barrier superconductor-ferromagnet junctions
• Proximity effects at ferromagnet-superconductor interfaces
• Odd-frequency superconducting pairing and subgap density of states at the edge of a two-dimensional topological insulator without magnetism
• Proximity Effects and Nonequilibrium Superconductivity in Transition-Edge Sensors
• Design and performance of an ultra-high vacuum scanning tunneling microscope operating at dilution refrigerator temperatures and high magnetic fields
• A scanning tunneling microscope for spectroscopic imaging below 90 mK in magnetic fields up to 17.5 T
• Local spectroscopy of a proximity superconductor at very low temperature
• Anomalous density of states in a metallic film in proximity with a superconductor
• Superconducting proximity effect in clean ferromagnetic layers
• Scanning Tunneling Spectroscopy of the superconducting proximity effect in a diluted ferromagnetic alloy
• Vibration isolation with high thermal conductance for a cryogen-free dilution refrigerator
• Construction of a Versatile Ultra-Low Temperature Scanning Tunneling Microscope
• A modular ultra-high vacuum millikelvin scanning tunneling microscope
• Design of a scanning gate microscope in a cryogen-free dilution refrigerator
• Design and performance of an ultra-high vacuum spin-polarized scanning tunneling microscope operating at 30 mK and in a vector magnetic field
• A 30 mK, 13.5 T scanning tunneling microscope with two independent tips
• Spatially-Correlated Microstructure and Superconductivity in Polycrystalline Boron-Doped Diamond
• A 350 mK, 9 T scanning tunneling microscope for the study of superconducting thin films and single crystals
• Millikelvin scanning tunneling microscope at 20/22 T with a graphite enabled stick-slip approach and an energy resolution below 8$\mu$eV: Application to conductance quantization at 20 T in single atom point contacts of Al and Au
• A millikelvin scanning tunneling microscope in ultra-high vacuum with adiabatic demagnetization refrigeration
• Combined scanning force microscopy and scanning tunneling spectroscopy of an electronic nano-circuit at very low temperature
• Mesoscopic proximity effect in double barrier Superconductor/Normal Metal junctions
• Room-temperature tunnel current amplifier and experimental setup for high resolution electronic spectroscopy in millikelvin STM experiments
• Subkelvin tunneling spectroscopy showing Bardeen-Cooper-Schrieffer superconductivity in heavily boron-doped silicon epilayers
• Transport properties of ferromagnet/d-wave superconductor/ferromagnet double junctions
• A subKelvin scanning probe microscope for the electronic spectroscopy of an individual nano-device
• The design and the performance of an ultrahigh vacuum 3He fridge-based scanning tunneling microscope with a double deck sample stage for in-situ tip treatment
• Coherent electronic transport through a superconducting film