Linear magnetoresistance with a universal energy scale in a strong-coupling superconductor
arXiv:2010.03319 · doi:10.1103/PhysRevB.102.241113
Abstract
The recent discovery of a nonsaturating linear magnetoresistance in several correlated electron systems near a quantum critical point has revealed an interesting interplay between the linear magnetoresistance and the zero-field linear-in-temperature resistivity. These studies suggest a possible role of quantum criticality on the observed linear magnetoresistance. Here, we report our discovery of a nonsaturating, linear magnetoresistance in MoGa, a nearly isotropic strong electron-phonon coupling superconductor with a linear-in-temperature resistivity from the transition temperature to 55 K. The growth of the resistivity in field is comparable to that in temperature, provided that both quantities are measured in the energy unit. Our datasets are remarkably similar to magnetoresistance data of the optimally doped LaSrCuO, despite the clearly different crystal and electronic structures, and the apparent absence of quantum critical physics in MoGa. A new empirical scaling formula is developed, which is able to capture the key features of the low-temperature magnetoresistance data of MoGa, as well as the data of LaSrCuO.
arXiv comment7 pages, 3 figures
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