Topological Lifshitz transition of the intersurface Fermi-arc loop in NbIrTe4

Ekahana SA, Li YW, Sun Y, Namiki H, Yang HF, Jiang J, Yang LX, Shi WJ, Zhang CF, Pei D, Chen C, Sasagawa T, Felser C, Yan BH, Liu ZK, Chen YL (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physical Review B American Physical Society

Book Volume: 102

Article Number: 085126

Journal Issue: 8

DOI: 10.1103/PhysRevB.102.085126

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.

Involved external institutions

ShanghaiTech University / 上海科技大学 CN China (CN) Tokyo Institute of Technology JP Japan (JP) Weizmann Institute of Science IL Israel (IL) University of Oxford GB United Kingdom (GB) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Tsinghua University CN China (CN)

How to cite

APA:

Ekahana, S.A., Li, Y.W., Sun, Y., Namiki, H., Yang, H.F., Jiang, J.,... Chen, Y.L. (2020). Topological Lifshitz transition of the intersurface Fermi-arc loop in NbIrTe4. Physical Review B, 102(8). https://doi.org/10.1103/PhysRevB.102.085126

MLA:

Ekahana, S. A., et al. "Topological Lifshitz transition of the intersurface Fermi-arc loop in NbIrTe4." Physical Review B 102.8 (2020).

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