LAUSR

Intriguing novel phenomena in lead films have inspired a new understanding of quantum physics, such as the quantum size effect and quantum phase transitions, etc. The improvement of the sample quality makes it even more promising to explore the intrinsic properties in two-dimensional systems. In this Rapid Communication, we show that the crystalline interfacial striped incommensurate layer can increase the quality of the lead films and significantly enhance the magnitude of magnetoresistance. By performing systematic transport measurements, a predominant anomalous linear magnetoresistance is revealed, and the widely used Parish-Littlewood model and Abrikosov's explanation fail to describe the observation. Instead, we propose another model of linear magnetoresistance based on linear band structure, which shows good agreement with the experimental results. Our studies reveal a different origin of linear magnetoresistance which may also be helpful to understand the linear magnetoresistance in other materials with a linear dispersion of the electronic structure.