ARPES study of a Multifold Fermionic Semimetal PdSb2

The experimental confirmation of the Dirac/Weyl fermions in topological semimetals invokes parallelism between particle physics and condensed matter physics. However, condensed matter physics has higher degrees of freedom because it is not limited by the Poincare symmetry. Type-II Dirac/Weyl fermions are the first example that shows such degrees of freedom. Recently, another type of unconventional quasiparticles that shows the flexibility has been proposed in several groups of materials, named multifold fermions. Multifold fermions are also called unconventional quasiparticles with a large Chern number, which have no high-energy counterpart. They are not only conceptually interesting, but also expected to have intriguing physical properties due to their topologically non-trivial nature. In this poster, we present our recent ARPES data to confirm the multifold fermions in PdSb2.