论文标题
肮脏限制范·霍夫（Van Hove）奇异性准颗粒的磁通转移
Magnetotransport of dirty-limit van Hove singularity quasiparticles
论文作者
论文摘要
调整电子密度状态奇异性是通往非常规金属物理学的常见途径。从概念上讲，范·霍夫（Van Hove）的奇异性仅在干净的二维系统中实现。因此，很少关注该无序（脏）极限。在这里，我们提供了一项磁磁系统钙掺杂畸形的磁磁系统的磁转运研究。费米液体特性持续存在跨磁性转变，但kadowaki-woods比率异常强。这是通过从状态探针密度推断出的非弹性电子散射和电子质量的强脱钩来揭示的。我们以磁场可调式范霍夫在存在的情况下讨论了这种费米液体行为。更笼统地，我们展示了维度和混乱如何控制跨磁性转变的运输特性的命运。
Tuning of electronic density-of-states singularities is a common route to unconventional metal physics. Conceptually, van Hove singularities are realized only in clean two-dimensional systems. Little attention has therefore been given to the disordered (dirty) limit. Here, we provide a magnetotransport study of the dirty metamagnetic system calcium-doped strontium ruthenate. Fermi liquid properties persist across the metamagnetic transition, but with an unusually strong variation of the Kadowaki-Woods ratio. This is revealed by a strong decoupling of inelastic electron scattering and electronic mass inferred from density-of-state probes. We discuss this Fermi liquid behavior in terms of a magnetic field tunable van Hove singularity in the presence of disorder. More generally, we show how dimensionality and disorder control the fate of transport properties across metamagnetic transitions.
