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Electron-Hole Tunneling Revealed by Quantum Oscillations in the Nodal-Line Semimetal HfSiS.
- Source :
-
Physical Review Letters . 12/21/2018, Vol. 121 Issue 25, p1-1. 1p. - Publication Year :
- 2018
-
Abstract
- We report a study of quantum oscillations in the high-field magnetoresistance of the nodal-line semimetal HfSiS. In the presence of a magnetic field up to 31 T parallel to the c axis, we observe quantum oscillations originating both from orbits of individual electron and hole pockets, and from magnetic breakdown between these pockets. In particular, we reveal a breakdown orbit enclosing one electron and one hole pocket in the form of a "figure of eight," which is a manifestation of Klein tunneling in momentum space, although in a regime of partial transmission due to the finite separation between the pockets. The observed very strong dependence of the oscillation amplitude on the field angle and the cyclotron masses of the orbits are in agreement with the theoretical predictions for this novel tunneling phenomenon. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRON tunneling
*SEMIMETALS
*MAGNETORESISTANCE
Subjects
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 121
- Issue :
- 25
- Database :
- Academic Search Index
- Journal :
- Physical Review Letters
- Publication Type :
- Academic Journal
- Accession number :
- 133730862
- Full Text :
- https://doi.org/10.1103/PhysRevLett.121.256602