Low temperature electrostatic force microscopy of a deep two-dimensional electron gas using a quartz tuning fork

J. A. Hedberg, A. Lal, Y. Miyahara, P. Grütter, G. Gervais, M. Hilke, L. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Using an ultralow temperature, high magnetic field scanning probe microscope, we have measured electric potentials of a deeply buried two-dimensional electron gas (2DEG). Relying on the capacitive coupling between the 2DEG and a resonant tip/cantilever structure, we can extract electrostatic potential information of the 2DEG from the dynamics of the oscillator. We present measurements using a quartz tuning fork oscillator and a 2DEG with a cleaved edge overgrowth structure. The sensitivity of the quartz tuning fork as force sensor is demonstrated by observation of Shubnikov-de Haas oscillations at a large tip-2DEG separation distance of more than 500 nm.

Original languageEnglish (US)
Article number143107
JournalApplied Physics Letters
Volume97
Issue number14
DOIs
StatePublished - Oct 4 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint

Dive into the research topics of 'Low temperature electrostatic force microscopy of a deep two-dimensional electron gas using a quartz tuning fork'. Together they form a unique fingerprint.

Cite this