Quantum oscillation and nontrivial transport in the Dirac Semimetal Cd3As2 nanodevice
Haiyang Pan, Kang Zhang, Zhongxia Wei, Bo Zhao, Jue Wang, Ming Gao, Li, Pi, Min Han, Fengqi Song, Xuefeng Wang, Baigeng Wang, Rong Zhang
TL;DR
This paper reports the observation of quantum oscillations in high-quality Cd3As2 nanowires, demonstrating topological Dirac fermion transport with nontrivial Berry phase, high mobility, and isotropic bulk behavior, revealing potential for quantum device applications.
Contribution
It presents the first demonstration of Shubnikov de Haas oscillations in Cd3As2 nanowires with detailed analysis of topological and transport properties.
Findings
Quantum oscillations observed at low magnetic fields
Nontrivial Berry phase indicating topological Dirac fermions
High mobility and isotropic bulk transport
Abstract
Here we demonstrate the Shubnikov de Haas oscillation in high-quality Cd3As2 nanowires grown by a chemical vapor deposition approach. The dominant transport of topological Dirac fermions is evident by the nontrivial Berry phase in the Landau Fan diagram. The quantum oscillations rise at a small field of 2 Tesla and preserves till up to 100K, revealing a sizeable Landau level gap and a mobility of over 2000 cm2/V-1s-1. The angle-variable oscillations indicates the isotropy of the bulk Dirac transport. The large estimated mean free path appeals the one-dimensional transport of Dirac semimetals.
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