金属中的线性磁电阻：光滑随机势中的导心扩散
Linear magnetoresistance in metals: guiding center diffusion in a smooth random potential
摘要：
我们预测，引导中心（GC）扩散产生线性和非饱和（横向）的3D金属磁电阻。我们的理论是半经典的，并适用于该制度的运输时间是远远大于回旋期间，并为弱无序的潜力，这是缓慢变化的长度尺度远大于回旋半径。在这些条件下，沿磁场$B$的小动量轨道被压缩，并主导横向电导率。当无序势强于德拜频率时，线性磁电阻被预测在室温及更高温度下仍然存在。我们认为，从GC扩散的磁电阻解释了最近观察到的巨线性磁电阻在三维狄拉克材料。
英文摘要：
We predict that guiding center (GC) diffusion yields a linear and non-saturating (transverse) magnetoresistance in 3D metals. Our theory is semi-classical and applies in the regime where the transport time is much greater than the cyclotron period, and for weak disorder potentials which are slowly varying on a length scale much greater than the cyclotron radius. Under these conditions, orbits with small momenta along magnetic field $B$ are squeezed and dominate the transverse conductivity. When disorder potentials are stronger than the Debye frequency, linear magnetoresistance is predicted to survive up to room temperature and beyond. We argue that magnetoresistance from GC diffusion explains the recently observed giant linear magnetoresistance in 3D Dirac materials.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
