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Sixfold fermion near the Fermi level in cubic PtBi2

by S. Thirupathaiah, Y. S. Kushnirenk, K. Koepernik, B. R. Piening, B. Buechner, S. Aswartham, J. van den Brink, S. V. Borisenko, I. C. Fulga

Submission summary

As Contributors: Ion Cosma Fulga · Jeroen van den Brink
Arxiv Link: https://arxiv.org/abs/2006.08642v1 (pdf)
Date submitted: 2020-06-17
Submitted by: Fulga, Ion Cosma
Submitted to: SciPost Physics
Discipline: Physics
Subject area: Condensed Matter Physics - Experiment
Approaches: Theoretical, Experimental

Abstract

We show that the cubic compound PtBi2, is a topological semimetal hosting a sixfold band touching point in close proximity to the Fermi level. Using angle-resolved photoemission spectroscopy, we map the bandstructure of the system, which is in good agreement with results from density functional theory. Further, by employing a low energy effective Hamiltonian valid close to the crossing point, we study the effect of a magnetic field on the sixfold fermion. The latter splits into a total of twenty Weyl cones for a Zeeman field oriented in the diagonal, [111] direction. Our results mark cubic PtBi2, as an ideal candidate to study the transport properties of gapless topological systems beyond Dirac and Weyl semimetals.

Current status:
Editor-in-charge assigned


Submission & Refereeing History

Submission 2006.08642v1 on 17 June 2020

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