Temperature-driven changes in the Fermi surface of graphite
- Resource Type
- Working Paper
- Authors
- Thoutam, Laxman R.; Pate, Samuel E.; Wang, Tingting; Wang, Yong-Lei; Divan, Ralu; Martin, Ivar; Luican-Mayer, Adina; Welp, Ulrich; Kwok, Wai-Kwong; Xiao, Zhi-Li
- Source
- Subject
- Condensed Matter - Materials Science
Condensed Matter - Strongly Correlated Electrons
- Language
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.
Comment: To appear in Physical Review B