fbpx
Wikipedia

Scanning gate microscopy

April 12, 2024

Scanning gate microscopy (SGM) is a scanning probe microscopy technique with an electrically conductive tip used as a movable gate that couples capacitively to the sample and probes electrical transport on the nanometer scale.[1][2] Typical samples are mesoscopic devices, often based on semiconductor heterostructures, such as quantum point contacts or quantum dots. Carbon nanotubes too have been investigated.

Operating principle edit

In SGM one measures the sample's electrical conductance as a function of tip position and tip potential. This is in contrast to other microscopy techniques where the tip is used as a sensor, e.g., for forces.

Development edit

SGMs were developed in the late 1990s from atomic force microscopes. Most importantly, these had to be adapted for use at low temperatures, often 4 kelvins or less, as the samples under study do not work at higher temperatures. Today an estimated number of eleven research groups worldwide use the technique.

References edit

  1. ^ Sellier, H; Hackens, B; Pala, M G; Martins, F; Baltazar, S; Wallart, X; Desplanque, L; Bayot, V; Huant, S (2011). "On the imaging of electron transport in semiconductor quantum structures by scanning-gate microscopy: successes and limitations". Semiconductor Science and Technology. 26 (6): 064008. arXiv:1104.2032. Bibcode:2011SeScT..26f4008S. doi:10.1088/0268-1242/26/6/064008. ISSN 0268-1242.
  2. ^ Gorini, Cosimo; Jalabert, Rodolfo A.; Szewc, Wojciech; Tomsovic, Steven; Weinmann, Dietmar (2013). "Theory of scanning gate microscopy". Physical Review B. 88 (3). arXiv:1302.1151. Bibcode:2013PhRvB..88c5406G. doi:10.1103/PhysRevB.88.035406. ISSN 1098-0121.

April 12, 2024
scanning, gate, microscopy, scanning, probe, microscopy, technique, with, electrically, conductive, used, movable, gate, that, couples, capacitively, sample, probes, electrical, transport, nanometer, scale, typical, samples, mesoscopic, devices, often, based, . Scanning gate microscopy SGM is a scanning probe microscopy technique with an electrically conductive tip used as a movable gate that couples capacitively to the sample and probes electrical transport on the nanometer scale 1 2 Typical samples are mesoscopic devices often based on semiconductor heterostructures such as quantum point contacts or quantum dots Carbon nanotubes too have been investigated Operating principle editIn SGM one measures the sample s electrical conductance as a function of tip position and tip potential This is in contrast to other microscopy techniques where the tip is used as a sensor e g for forces Development editSGMs were developed in the late 1990s from atomic force microscopes Most importantly these had to be adapted for use at low temperatures often 4 kelvins or less as the samples under study do not work at higher temperatures Today an estimated number of eleven research groups worldwide use the technique References edit Sellier H Hackens B Pala M G Martins F Baltazar S Wallart X Desplanque L Bayot V Huant S 2011 On the imaging of electron transport in semiconductor quantum structures by scanning gate microscopy successes and limitations Semiconductor Science and Technology 26 6 064008 arXiv 1104 2032 Bibcode 2011SeScT 26f4008S doi 10 1088 0268 1242 26 6 064008 ISSN 0268 1242 Gorini Cosimo Jalabert Rodolfo A Szewc Wojciech Tomsovic Steven Weinmann Dietmar 2013 Theory of scanning gate microscopy Physical Review B 88 3 arXiv 1302 1151 Bibcode 2013PhRvB 88c5406G doi 10 1103 PhysRevB 88 035406 ISSN 1098 0121 Retrieved from https en wikipedia org w index php title Scanning gate microscopy amp oldid 1077543985, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.