Band structure of magnetic type-I Weyl semimetal candidates PrAl(Ge,Si)

Weyl semimetals are materials characterized by surface states, which are identified by Fermi arcs, induced by the non-trivial topology of the bulk band structure. In this work, we used soft x-ray angular photoemission spectroscopy (SX-ARPES) and complementary bulk measurements in order to map out the topology of the type-I Weyl semimetal candidates PrAl(Ge,Si) [1,2]. The SX-ARPES measurements were obtained at the 29-ID beamline at APS synchrotron. Looking to the paramagnetic band structure and to the evolution of the magnetoresistance [3], we discuss the role of the crystalline electrical field effects when we substitute Ge for Si.

[1] G. Chang et al., Phys. Rev. B Rapid Comm. 97, 041104(R) (2018).
[2] D.S. Sanchez et al., Nat. Comm. 11(1), 1-8 (2020).
[3] H.-Y. Yang et al., APL Mat. 8(1), 011111 (2020).