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Condensed Matter > Strongly Correlated Electrons

arXiv:1809.05357 (cond-mat)
[Submitted on 14 Sep 2018]

Title:Mechanical dissipation from charge and spin transitions in oxygen deficient SrTiO_3

Authors:Marcin Kisiel, Oleg O. Brovko, Dilek Yildiz, Remy Pawlak, Urs Gysin, Erio Tosatti, Ernst Meyer
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Abstract:Bodies in relative motion separated by a gap of a few nanometers can experience a tiny friction force. This non-contact dissipation can have various origins and can be successfully measured by a sensitive pendulum atomic force microscope tip oscillating laterally above the surface. Here, we report on the observation of dissipation peaks at selected voltage-dependent tip-surface distances for oxygen-deficient strontium titanate (SrTiO_3) surface at low temperatures (T = 5K). The observed dissipation peaks are attributed to tip-induced charge and spin state transitions in quantum-dot-like entities formed by single oxygen vacancies (and clusters thereof, possibly through a collective mechanism) at the SrTiO_3 surface, which in view of technological and fundamental research relevance of the material opens important avenues for further studies and applications.
Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:1809.05357 [cond-mat.str-el]
  (or arXiv:1809.05357v1 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.1809.05357
Journal reference: Nature Communicationsvolume 9, Article number: 2946 (2018)
Related DOI: https://doi.org/10.1038/s41467-018-05392-1

Submission history

From: Marcin Kisiel [view email]
[v1] Fri, 14 Sep 2018 11:24:35 UTC (1,821 KB)
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