Delafossites 中的 Bloch-Lorentz 磁阻振荡
Bloch-Lorentz magnetoresistance oscillations in delafossites
AI总结：
本文提出 Bloch-Lorentz 振荡的半经典理论，解释 delafossites 面外磁阻中类 Aharonov-Bohm 振荡，并指出样品壁散射是限制其可见度的主要因素。
摘要：
最近对 delafossites（PdCoO2 和 PtCoO2）面外磁阻的测量观察到了与 Aharonov-Bohm 效应非常相似的振荡。在此，我们表明这些磁阻振荡可由面外电子轨迹的类 Bloch 振荡来解释。我们发展了这些 Bloch-Lorentz 振荡的半经典理论，并证明它们是 delafossites 的弹道输运和准二维色散的结果。我们的模型指出，样品壁散射最可能是限制现有实验中这些 Bloch-Lorentz 振荡可见度的因素。
英文摘要：
Recent measurements of the out-of-plane magnetoresistance of delafossites (PdCoO$_2$ and PtCoO$_2$) 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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