Quantum transport in topological semimetals under magnetic fields (II)

Sun, Hai-Peng1,2,3,4; Lu, Hai-Zhou2,3,4

2019-06

10.1007/s11467-019-0890-7

Frontiers of Physics   影响因子和分区

2095-0462

2095-0470

We review our recent works on the quantum transport, mainly in topological semimetals and also in topological insulators, organized according to the strength of the magnetic field. At weak magnetic fields, we explain the negative magnetoresistance in topological semimetals and topological insulators by using the semiclassical equations of motion with the nontrivial Berry curvature. We show that the negative magnetoresistance can exist without the chiral anomaly. At strong magnetic fields, we establish theories for the quantum oscillations in topological Weyl, Dirac, and nodal-line semimetals. We propose a new mechanism of 3D quantum Hall effect, via the wormhole tunneling through the Weyl orbit formed by the Fermi arcs and Weyl nodes in topological semimetals. In the quantum limit at extremely strong magnetic fields, we find that an unexpected Hall resistance reversal can be understood in terms of the Weyl fermion annihilation. Additionally, in parallel magnetic fields, longitudinal resistance dips in the quantum limit can serve as signatures for topological insulators.

topological semimetal topological insulator quantum oscillation negative magnetoresistance quantum Hall effect

SCI

英语

通讯

Science, Technology, and Innovation Commission of Shenzhen Municipality[ZDSYS20170303165926217] ; Science, Technology, and Innovation Commission of Shenzhen Municipality[JCYJ20170412152620376]

Physics

Physics, Multidisciplinary

WOS:000465246800001

HIGHER EDUCATION PRESS

Web of Science

QKH20192019102400026611

1.Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Shenzhen Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China

Sun, Hai-Peng,Lu, Hai-Zhou. Quantum transport in topological semimetals under magnetic fields (II)[J]. Frontiers of Physics,2019,14(3).

Sun, Hai-Peng,&Lu, Hai-Zhou.(2019).Quantum transport in topological semimetals under magnetic fields (II).Frontiers of Physics,14(3).

Sun, Hai-Peng,et al."Quantum transport in topological semimetals under magnetic fields (II)".Frontiers of Physics 14.3(2019).