论文标题
温度驱动的石墨表面变化
Temperature-driven changes in the Fermi surface of graphite
论文作者
论文摘要
我们报告了磁转运测量结果揭示的石墨中的温度依赖性尺寸和移民的各向异性。沿C轴在田地中获得的磁静力遵守了延长的科勒规则，并在预测温度依赖的费米能量后的载体密度，表明随温度的温度，费米口袋大小的变化。给定温度下的角度依赖性磁倍率表现出缩放行为。还发现反映费米表面各向异性的缩放系数随温度变化。我们的结果表明，温度驱动的费米表面的变化可能无处不在，需要考虑在半法中的温度依赖性载体密度和磁舒张各向异性方面。
We report on temperature-dependent size and anisotropy of the Fermi pockets in graphite revealed by magnetotransport measurements. The magnetoresistances obtained in fields along the c-axis obey an extended Kohler's rule, with the carrier density following prediction of a temperature-dependent Fermi energy, indicating a change in the Fermi pocket size with temperature. The angle-dependent magnetoresistivities at a given temperature exhibit a scaling behavior. The scaling factor that reflects the anisotropy of the Fermi surface is also found to vary with temperature. Our results demonstrate that temperature-driven changes in Fermi surface can be ubiquitous and need to be considered in understanding the temperature-dependent carrier density and magnetoresistance anisotropy in semimetals.
