Quantum oscillations from Fermi arc surface states in Cd3As2 submicron wires

Topological materials such as topological insulators and Weyl/Dirac semimetals possess topologically protected surface states giving birth to various unique phenomena and functionaries. To investigate the surface transport phenomena toward possible application to electric devices, nano- and submicron-scale structures of topological Dirac semimetals are of particular interest since they can be grown by an economical chemical vapor deposition (CVD) method. However, quantum oscillations associated with the topological surface states have not been well explored in nano or submicron wires despite a most fundamental transport signature of the surface state. Here, we successfully observe quantum oscillations resulting from the surface states in magnetoresistance measurements for submicron wires of Dirac semimetal Cd3As2 grown by a CVD method. The oscillation frequencies and phases suggest that the surface quantum oscillations originate from closed orbits located on each surface constructed from the Fermi arcs. Our results will stimulate further research on quantum transport phenomena in topological wires.