Fermi Surface Nesting And Intrinsic Resistivity Of Beryllium: First-Principles Calculations
PHYSICAL REVIEW B(2019)
摘要
Within the semiclassical Boltzmann transport theory, we perform a systematic first-principles calculation of the intrinsic resistivity of beryllium, a nodal-line semimetal. The Wannier interpolation technique to treat the electron-phonon (e-ph) interaction is employed to guarantee a high precision of the numerical results. Our numerical results of the intrinsic resistivity of beryllium agree quantitatively with experimental data in a large temperature range. We find that around each joint region between the electron and hole pockets, the Fermi surface of beryllium forms a pair of vertical facets (parallel to c axis). Then, the nesting effect between such Fermi surface segments near inequivalent vertices of the hexagonal Brillouin zone can be realized by e-ph scattering with a relatively short phonon wavelength. Such a Fermi surface nesting effect plays the dominant role in the intrinsic resistivity. It is also the underlying mechanism for linear temperature dependence of the intrinsic resistivity from a very low critical temperature (200 K). In contrast, the contribution of the topological nontrivial states near the nodal line to the intrinsic resistivity is less important because only a few of such states appear in the vicinity of the Fermi surface due to the sizable dispersion of the nodal line.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要