h/e Oscillations in Interlayer Transport of Delafossites
Description
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 the 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; here 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 10mm and persisting up to temperatures of T>50K. 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 the delafossites.
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http://data.europa.eu/88u/dataset/oai-zenodo-org-3725930 |
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http://data.europa.eu/88u/dataset/oai-zenodo-org-3725930 |