Measuring spin and charge correlations via tunneling-current conductance fluctuations

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dc.creatorPatton, Kelly R.
dc.creatorHafermann, Hartmut
dc.creatorBrener, Sergej
dc.creatorLichtenstein, Alexander I.
dc.creatorKatsnelson, Mikhail I.
dc.date2009-02-02
dc.date.accessioned2026-07-07T12:36:56Z
dc.date.available2026-07-07T12:36:56Z
dc.descriptionScanning tunneling miscoscopy is one of the most powerful spectroscopic tools for single-electron excitations. We show that the conductance fluctuations, or noise in the conductance, of a tunneling current into an interacting electron system is dominated by density-density and spin-spin correlations. This allows one to probe two-particle properties (susceptibilities) and collective excitations by standard experimental tunneling methods. We demonstrate this theoretically, using a novel many-body calculation for the multi-center Kondo problem, including both direct and indirect exchange between magnetic atoms. An example of the two-particle correlations around a single magnetic adatom in the Kondo regime, as would be viewed by a scanning tunneling microscope, is given. The spatial dependance of the charge and spin correlations, including the formation of the Kondo cloud in the spin sector, are shown.
dc.identifierhttps://arxiv.org/abs/0902.0225
dc.identifierhttp://arxiv.org/abs/0902.0225
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218267
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleMeasuring spin and charge correlations via tunneling-current conductance fluctuations
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