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Related Experiment Video

Updated: Feb 4, 2026

Use of Sacrificial Nanoparticles to Remove the Effects of Shot-noise in Contact Holes Fabricated by E-beam Lithography

Use of Sacrificial Nanoparticles to Remove the Effects of Shot-noise in Contact Holes Fabricated by E-beam Lithography

Published on: February 12, 2017

Atomic scale shot-noise using cryogenic MHz circuitry.

F Massee¹, Q Dong², A Cavanna²

¹Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Sud/Université Paris-Saclay, 91405 Orsay, France.

The Review of Scientific Instruments

|October 4, 2018

Summary

This summary is machine-generated.

We developed a scanning tunneling microscope (STM) with MHz cryogenic circuitry for atomic-scale shot-noise detection. This advancement enables studying charge and correlation effects in materials at unprecedented resolution.

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Area of Science:

Condensed Matter Physics
Materials Science
Surface Science

Background:

Scanning tunneling microscopy (STM) traditionally operates at low frequencies (<10 kHz).
Studying charge and correlation effects at the atomic scale requires higher sensitivity and bandwidth.

Purpose of the Study:

To develop an STM with MHz cryogenic circuitry for enhanced detection capabilities.
To demonstrate atomic-scale shot-noise detection and electron temperature sensitivity.

Main Methods:

Implementation of dedicated cryogenic circuitry operating in the MHz regime.
Simultaneous measurement of atomically resolved differential conductance and shot-noise.
Calibration on a gold surface and testing on Bi₂Sr₂CaCu₂O₈₊.

Main Results:

Successful shot-noise detection at the atomic scale and low currents (<1 nA) at 1 MHz.
Demonstrated direct sensitivity to tunneling electron temperature at low voltages.
Established a new capability for high-frequency measurements in STM.

Conclusions:

The developed MHz circuitry significantly expands the possibilities of STM.
Enables the study of charge and correlation effects in a wide range of materials at the atomic scale.
Opens new avenues for fundamental research in condensed matter physics.