Quantum oscillations and nonsaturating magnetoresistivity in nodal-line semimetals
TLDR
This paper investigates quantum oscillations and nonsaturating magnetoresistivity in nodal-line semimetals, revealing distinct oscillation frequencies.
Key contributions
- Analyzes magnetotransport, quantum oscillations, and magnetoresistivity in the nodal-line semimetal EuGa4.
- Discovers two distinct oscillation frequencies originating from the characteristic torus Fermi surface.
- These frequencies are identified as important experimental signatures for nodal-line semimetals.
- Calculates nonsaturating magnetoresistivity, noting a smaller ratio than reported experimental values.
Why it matters
Understanding magnetotransport in topological systems is crucial for extracting intrinsic information like band structures and Fermi surfaces. This work provides insights into nodal-line semimetals, highlighting unique experimental signatures and discrepancies with reported magnetoresistivity.
Original Abstract
Understanding the magnetotransport behaviors in topological systems remains alluring, as a lot of intrinsic information could be extracted, e.g., the band structures, Berry phase, Fermi surface, carrier density, and so on. Motivated by the recent magnetotransport developments in nodal-line semimetal, EuGa4, in this paper, we will study the magnetotransport properties of the system, focusing on the quantum oscillations and nonsaturating magnetoresistivity (MR). Firstly, we analyze the chemical potential and magnetoconductivity oscillations with the magnetic field and reveal that there exist two distinct oscillation frequencies, which are caused by the characteristic torus Fermi surface and can be regarded as an important experimental signature of nodal-line semimetals. Then we calculate the MR and find that although the MR is nonsaturating with the magnetic field in the low-energy region, the MR ratio is much smaller than that reported in the experiment.
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