**Xiaomei Chen and Rui Zhu \***

Department of Physics, South China University of Technology, Guangzhou 510641, China; 201720127507@mail.scut.edu.cn

**\*** Correspondence: rzhu@scut.edu.cn

Received: 28 November 2018; Accepted: 4 February 2019; Published: 22 February 2019

**Abstract:** In this work, pumped currents of the adiabatically-driven double-barrier structure based on the pseudospin-1 Dirac–Weyl fermions are studied. As a result of the three-band dispersion and hence the unique properties of pseudospin-1 Dirac–Weyl quasiparticles, sharp current-direction reversal is found at certain parameter settings especially at the Dirac point of the band structure, where apexes of the two cones touch at the flat band. Such a behavior can be interpreted consistently by the Berry phase of the scattering matrix and the classical turnstile mechanism.

**Keywords:** quantum transport
