Virtual scanning tunneling microscopy: A local spectroscopic probeof two-dimensional electron systems

We propose a probe technique capable of performing local low-temperature spectroscopy on a two-dimensional electron system (2DES) in a semiconductor heterostructure. Motivated by predicted spatially-structured electron phases, the probe uses a charged metal tip to induce electrons to tunnel locally,...

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Bibliographic Details
Published inApplied physics letters Vol. 97; no. 13; pp. 132103 - 132103-3
Main Authors Sciambi, A., Pelliccione, M., Bank, S. R., Gossard, A. C., Goldhaber-Gordon, D.
Format Journal Article
Published American Institute of Physics 27.09.2010
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Summary:We propose a probe technique capable of performing local low-temperature spectroscopy on a two-dimensional electron system (2DES) in a semiconductor heterostructure. Motivated by predicted spatially-structured electron phases, the probe uses a charged metal tip to induce electrons to tunnel locally, directly below the tip, from a "probe" 2DES to a "subject" 2DES of interest. We test this concept with large-area (nonscanning) tunneling measurements, and predict a high spatial resolution and spectroscopic capability, with minimal influence on the physics in the subject 2DES.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3492440