Fast probe of local electronic states in nanostructures utilizing a single-lead quantum dot

Abstract

Transport measurements are powerful tools to probe electronic properties of solid-state materials. To access properties of local electronic states in nanostructures, such as local density of states, electronic distribution and so on, micro-probes utilizing artificial nanostructures have been invented to perform measurements in addition to those with conventional macroscopic electronic reservoirs. Here we demonstrate a new kind of micro-probe: a fast single-lead quantum dot probe, which utilizes a quantum dot coupled only to the target structure through a tunneling barrier and fast charge readout by RF reflectometry. The probe can directly access the local electronic states with wide bandwidth. The probe can also access more electronic states, not just those around the Fermi level, and the operations are robust against bias voltages and temperatures.

6 pages, 6 figures

References in corpus (6)

• Quantum Computing
• Single-shot read-out of an individual electron spin in a quantum dot
• Fast Single-Charge Sensing with an rf Quantum Point Contact
• A cryogenic amplifier for fast real-time detection of single-electron tunneling
• Excited-state spectroscopy on a quantum dot side-coupled to a quantum wire
• Detection of spin polarization utilizing singlet and triplet states in a single-lead quantum dot

Cited by in corpus (5)

• Probing quantum devices with radio-frequency reflectometry
• Radio-frequency reflectometry in bilayer graphene devices utilizing micro graphite back-gates
• Gate voltage dependence of noise distribution in radio-frequency reflectometry in gallium arsenide quantum dots
• Wide dynamic range charge sensor operation by high-speed feedback control of radio-frequency reflectometry
• Charge state estimation in quantum dots using a Bayesian approach