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h/e oscillations in interlayer transport of delafossites

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Author(s)

Carsten Putzke, Maja D. Bachmann, Philippa McGuinness, Elina Zhakina, Veronika Sunko, Marcin Konczykowski, Takashi Oka, Roderich Moessner, Ady Stern, Markus König, Seunghyun Khim, Andrew P. Mackenzie, Philip J.W. Moll

School/Research organisations

Abstract

Microstructures 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 > 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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Original languageEnglish
Pages (from-to)1234-1238
Number of pages5
JournalScience
Volume368
Issue number6496
DOIs
Publication statusPublished - 12 Jun 2020

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