# Item

ITEM ACTIONSEXPORT

Released

Journal Article

#### Topological Lifshitz transition of the intersurface Fermi-arc loop in
NbIrTe_{4}

##### MPS-Authors

##### External Resource

No external resources are shared

##### Fulltext (public)

There are no public fulltexts stored in PuRe

##### Supplementary Material (public)

There is no public supplementary material available

##### Citation

Ekahana, S. A., Li, Y. W., Sun, Y., Namiki, H., Yang, H. F., Jiang, J., et al. (2020).
Topological Lifshitz transition of the intersurface Fermi-arc loop in NbIrTe_{4}.* Physical
Review B,* *102*(8): 085126, pp. 1-6. doi:10.1103/PhysRevB.102.085126.

Cite as: http://hdl.handle.net/21.11116/0000-0007-0C2A-E

##### Abstract

Surface arcs (SAs) or Fermi arcs connecting pairs of bulk Weyl points with opposite chiralities are the signatures of Weyl semimetals in angle-resolved photoemission spectroscopy (ARPES) studies. The nontrivial topology of the bulk band structure guarantees the existence of these exotic Fermi arcs with connectivity that is strongly dependent on the surface. It has been theoretically proposed and experimentally confirmed that Fermi arcs at opposite surfaces can complete an unusual closed cyclotron orbit called a Weyl orbit, which leads to various intriguing transport properties. In this paper, a systematic ARPES study on opposite terminations (001) of type-II Weyl semimetal NbIrTe4 reveals different Fermi arc connections which result in a unique closed intersurface Fermi arc loop configurations (combining both projections of SAs) containing two pairs of Weyl points. In particular, the top surface ARPES data and corresponding ab initio calculation suggests that a topological Lifshitz transition occurs by tuning the chemical potential. SA rewiring on the top surface opens the intersurface arc loop at the Weyl node energy level into an open line, challenging the close-orbit description and leading to an unexplored scenario. Our results demonstrate the intrinsic alteration of Fermi arc connections and propose NbIrTe4 as a potential platform to examine Fermi-arc related phenomenon.