Mechanical dissipation via image potential states on a topological insulator surface

D. Yildiz*, M. Kisiel, U. Gysin, O. Gürlü, E. Meyer

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20 Atıf (Scopus)

Özet

Joule energy loss due to resistive heating is omnipresent in today’s electronic devices whereas quantum-mechanical dissipation is largely unexplored. Here, we experimentally observe a suppression of the Joule dissipation in Bi2Te3 due to topologically protected surface states. Instead, a different type of dissipation mechanism is observed by pendulum atomic force microscopy, which is related to single-electron tunnelling resonances into image potential states that are slightly above the Bi2Te3 surface. The application of a magnetic field leads to the breakdown of the topological protection of the surface states and restores the expected Joule dissipation process. Nanomechanical energy dissipation experienced by the cantilever of the pendulum atomic force microscope provides a rich source of information on the dissipative nature of the quantum-tunnelling phenomena on the topological insulator surface, with implications for coupling a mechanical oscillator to the generic quantum material.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)1201-1206
Sayfa sayısı6
DergiNature Materials
Hacim18
Basın numarası11
DOI'lar
Yayın durumuYayınlandı - 1 Kas 2019

Bibliyografik not

Publisher Copyright:
© 2019, The Author(s), under exclusive licence to Springer Nature Limited.

Finansman

We acknowledge fruitful discussions with E. Tosatti. The Basel group acknowledges financial support from the Swiss National Science Foundation (SNSF), the COST action Project MP1303, the SINERGIA Project CRSII2 136287/1, the European Union’s Horizon 2020 research and innovation programme (ERC Advanced Grant no. 834402) and the Swiss Nanoscience Institute (project no. P1301). O.G. acknowledges financial support from TÜBİTAK project 114F036 and the COST action project MP1303 (TÜBİTAK112T818).

FinansörlerFinansör numarası
Horizon 2020 Framework Programme834402
Swiss Nanoscience Institute114F036, P1301, TÜBİTAK112T818
European Research Council
European Cooperation in Science and TechnologyMP1303, CRSII2 136287/1
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungSINERGIA CRSII2 136287/1

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