Work

Atomic scale shot-noise using cryogenic MHz circuitry

Year: 2018

Type: article

Abstract: By implementing dedicated cryogenic circuitry operating in the MHz regime, we have developed a scanning tunneling microscope (STM) capable of conventional, low frequency (<10 kHz), microscopy as well spectroscopy and shot-noise detection at 1 MHz. After calibrating our AC circuit on a gold surface, we illustrate our capability to detect shot-noise at the atomic scale and at low currents (<1 nA) by simultaneously measuring the atomically resolved differential conductance and shot-noise on the high temperature superconductor Bi2Sr2CaCu2O8+x. We further show our direct sensitivity to the temperature of the tunneling electrons at low voltages. Our MHz circuitry opens up the possibility to study charge and correlation effects at the atomic scale in all materials accessible to STM.

Source: Review of Scientific Instruments

DOI: 10.1063/1.5043261

Authors: F. Massee, Q. Dong, A. Cavanna, Y. Jin, M. Aprili

Institutions: Université Paris-Sud, Centre National de la Recherche Scientifique, Université Paris-Saclay, Laboratoire de physique des Solides, Centre de Nanosciences et de Nanotechnologies

Language: English

Topic: Surface and Thin Film Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Agence Nationale de la Recherche, Horizon 2020 Framework Programme, H2020 Marie Skłodowska-Curie Actions

Awards: Atomic-scale electron correlations using time-resolved scanning tunnelling microscopy, G5420063140, Shot noise scanning probe microscopy: probing the dynamics at the atomic scale