Liquid-induced damping of mechanical feedback effects in single electron tunneling through a suspended carbon nanotube

Journal Article · Mon Sep 21 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4931775· OSTI ID:22482145

Schmid, D. R.; Stiller, P. L.; Strunk, Ch.

In single electron tunneling through clean, suspended carbon nanotube devices at low temperature, distinct switching phenomena have regularly been observed. These can be explained via strong interaction of single electron tunneling and vibrational motion of the nanotube. We present measurements on a highly stable nanotube device, subsequently recorded in the vacuum chamber of a dilution refrigerator and immersed in the {sup 3}He/ {sup 4}He mixture of a second dilution refrigerator. The switching phenomena are absent when the sample is kept in the viscous liquid, additionally supporting the interpretation of dc-driven vibration. Transport measurements in liquid helium can thus be used for finite bias spectroscopy where otherwise the mechanical effects would dominate the current.

• OSTI ID: 22482145
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 12 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON NANOTUBES
CURRENTS
DAMPING
DILUTION
FEEDBACK
HELIUM
HELIUM 3
HELIUM 4
LIQUIDS
MECHANICAL PROPERTIES
REFRIGERATORS
TUNNEL EFFECT