• DOI:10.1103/PhysRevLett.114.176601
• Corpus ID: 16496348

Quantum Oscillations, Thermoelectric Coefficients, and the Fermi Surface of Semimetallic WTe2.

@article{Zhu2015QuantumOT,
  title={Quantum Oscillations, Thermoelectric Coefficients, and the Fermi Surface of Semimetallic WTe2.},
  author={Zengwei Zhu and Xiao Lin and Juan Liu and Benoı̂t Fauqu{\'e} and Qian Tao and Chongli Yang and Youguo Shi and Kamran Behnia},
  journal={Physical review letters},
  year={2015},
  volume={114 17},
  pages={
          176601
        }
}

• Zengwei Zhu, Xiao Lin, +5 authors Kamran Behnia
• Published 27 February 2015
• Physics
• Physical review letters

We present a study of angle-resolved quantum oscillations of electric and thermoelectric transport coefficients in semimetallic WTe2, which has the particularity of displaying a large B(2) magnetoresistance. The Fermi surface consists of two pairs of electronlike and holelike pockets of equal volumes in a "Russian doll" structure. The carrier density, Fermi energy, mobility, and the mean-free path of the system are quantified. An additional frequency is observed above a threshold field and attributed to the magnetic breakdown across two orbits. In contrast to all other dilute metals, the Nernst signal remains linear in the magnetic field even in the high-field (ωcτ≫1) regime. Surprisingly, none of the pockets extend across the c axis of the first Brillouin zone, making the system a three-dimensional metal with moderate anisotropy in Fermi velocity, yet a large anisotropy in the mean-free path.