Bloch-Lorentz magnetoresistance oscillations in delafossites
K. Vilkelis (Kavli institute of nanoscience Delft, TU Delft - QRD/Wimmer Group, TU Delft - QuTech Advanced Research Centre)
Lin Wang (TU Delft - QN/Akhmerov Group, Kavli institute of nanoscience Delft)
A.R. Akhmerov (Kavli institute of nanoscience Delft, TU Delft - QN/Akhmerov Group)
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Abstract
Recent measurements of the out-of-plane magnetoresistance of delafossites (PdCoO2 and PtCoO2) observed oscillations closely resembling the Aharonov-Bohm effect. Here, we show that the magnetoresistance oscillations are explained by the Bloch-like oscillations of the out-of-plane electron trajectories. We develop a semiclassical theory of these Bloch-Lorentz oscillations and show that they are a consequence of the ballistic motion and quasi-2D dispersion of delafossites. Our model identifies the sample wall scattering to be the most likely factor limiting the visibility of these Bloch-Lorentz oscillations in existing experiments.
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