Atomic scale shot-noise using broadband scanning tunnelling microscopy

Abstract

We have developed a broadband scanning tunnelling microscope 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 Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$. We further show our direct sensitivity to the temperature of the tunnelling electrons at low voltages. Our broadband probe opens up the possibility to study charge and correlation effects at the atomic scale in all materials accessible to STM.

References in corpus (7)

• Shot Noise in Mesoscopic Conductors
• Noisy Kondo impurities
• Evolution of the Kondo Effect in a Quantum Dot Probed by the Shot Noise
• Universality of Non-equilibrium Fluctuations in Strongly Correlated Quantum Liquids
• Shot Noise through a Quantum Dot in the Kondo Regime
• Dynamical Coulomb Blockade of Shot Noise
• Charge of a quasiparticle in a superconductor

Cited by in corpus (20)

• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
• Proximity superconductivity in atom-by-atom crafted quantum dots
• Amplifier for scanning tunneling microscopy at MHz frequencies
• Dynamical Coulomb Blockade as a Local Probe for Quantum Transport
• Identifying Majorana bound states by tunneling shot-noise tomography
• Coherent and incoherent tunneling into YSR states revealed by atomic scale shot-noise spectroscopy
• Noisy defects in a doped Mott insulator
• Spatial and energy resolution of electronic states by shot noise
• Atomic manipulation of the gap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$
• Scanning Tunneling Shot Noise Spectroscopy in Kondo Systems
• Design and performance of an ultrahigh vacuum spectroscopic-imaging scanning tunneling microscope with a hybrid vibration isolation system
• Extracting the Transport Channel Transmissions in Scanning Tunneling Microscopy using the Superconducting Excess Current
• Shot-noise and differential conductance as signatures of putative topological superconductivity in FeSe${}_{0.45}$Te${}_{0.55}$
• Shot-noise measurements of single-atom junctions
• Why shot noise does not generally detect pairing in mesoscopic superconducting tunnel junctions
• Tunable high speed atomic rotor in Bi${}_2$Se${}_3$ revealed by current noise
• Anisotropy of Yu-Shiba-Rusinov states in NbSe${}_2$
• Topologically trivial gap-filling in superconducting Fe(Se,Te) by one dimensional defects
• Identifying Majorana Zero Modes in Vortex Lattices Using Fano Factor Tomography
• Evidence for atomic-scale vibron-mediated electron bunching