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  h/e oscillations in interlayer transport of delafossites

Putzke, C., Bachmann, M. D., McGuinness, P., Zhakina, E., Sunko, V., Konczykowski, M., et al. (2020). h/e oscillations in interlayer transport of delafossites. Science, 368(6496), 1234-1238. doi:10.1126/science.aay8413.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-8D58-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-8D5F-2
Genre: Journal Article

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 Creators:
Putzke, Carsten1, Author
Bachmann, Maja D.2, Author              
McGuinness, Philippa3, Author              
Zhakina, Elina3, Author              
Sunko, Veronika3, Author              
Konczykowski, Marcin, Author
Oka, Takashi3, Author              
Moessner, Roderich, Author
Stern, Ady, Author
König, Markus4, Author              
Khim, Seunghyun3, Author              
Mackenzie, Andrew P.5, Author              
Moll, Philip J. W., Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Microstructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_2466701              
3Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
4Markus König, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863470              
5Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              

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 Abstract: The wave nature of conducting electrons in solids can be revealed through interference effects. In layered materials, these effects are most often seen in in-plane transport. By contrast, Putzke et al. studied electronic transport perpendicular to the conductive layers in the ultraclean delafossites PdCoO2 and PtCoO2. When an in-plane magnetic field was applied, the electrical resistance exhibited periodic oscillations as a function of field magnitude. The findings can be explained through a model that requires that the electronic waves remain coherent over macroscopic distances.Science, this issue p. 1234Microstructures can be carefully designed to reveal the quantum phase of the wave-like nature of electrons in a metal. Here, we report phase-coherent oscillations of out-of-plane magnetoresistance in the layered delafossites PdCoO2 and PtCoO2. The oscillation period is equivalent to that determined by the magnetic flux quantum, h/e, threading an area defined by the atomic interlayer separation and the sample width, where h is Planck’s constant and e is the charge of an electron. The phase of the electron wave function appears robust over length scales exceeding 10 micrometers and persisting up to temperatures of T gt; 50 kelvin. We show that the experimental signal stems from a periodic field modulation of the out-of-plane hopping. These results demonstrate extraordinary single-particle quantum coherence lengths in delafossites.

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Language(s): eng - English
 Dates: 2020-06-122020-06-12
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: DOI: 10.1126/science.aay8413
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Title: Science
  Other : Science
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Association for the Advancement of Science
Pages: - Volume / Issue: 368 (6496) Sequence Number: - Start / End Page: 1234 - 1238 Identifier: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1