Topological electronic structure in the antiferromagnet HoSbTe

Abstract

Magnetic topological materials, in which the time-reversal symmetry is broken, host various exotic quantum phenomena, including the quantum anomalous Hall effect, axion insulator states, and Majorana fermions. The study of magnetic topological materials is at the forefront of condensed matter physics. Recently, a variety of magnetic topological materials have been reported, such as Mn${}_3$Sn, Co${}_3$Sn${}_2$S${}_2$, Fe${}_3$Sn${}_2$, and MnBi${}_2$Te${}_4$. Here, we report the observation of a topological electronic structure in an antiferromagnet, HoSbTe, a member of the ZrSiS family of materials, by angle-resolved photoemission spectroscopy measurements and first-principles calculations. We demonstrate that HoSbTe is a Dirac nodal line semimetal when spin-orbit coupling (SOC) is neglected. However, our theoretical calculations show that the strong SOC in HoSbTe fully gaps out the nodal lines and drives the system to a weak topological insulator state, with each layer being a two-dimensional topological insulator. Because of the strong SOC in HoSbTe, the gap is as large as hundreds of meV along specific directions, which is directly observed by our ARPES measurements. The existence of magnetic order and topological properties in HoSbTe makes it a promising material for realization of exotic quantum devices.

arXiv comment5 pages, 3 figures

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Cited by in corpus (20)

• Complex magnetic phases enriched by charge density waves in topological semimetals GdSb_xTe_{2-x-δ}
• Evolving Devil's staircase magnetization from tunable charge density waves in nonsymmorphic Dirac semimetals
• Observation of multiple nodal-lines in SmSbTe
• Magnetic Topological Semimetal Phase with Electronic Correlation Enhancement in SmSbTe
• Competing magnetic phases in LnSbTe (Ln = Ho and Tb)
• Observation of gapless nodal-line states in NdSbTe
• Evolution of Magnetism in Magnetic Topological Semimetal NdSb${}_x$Te${}_{2-x+\delta }$
• Evolution of Electronic and Magnetic Properties in Topological Semimetal SmSbxTe2-x
• Colossal negative magnetoresistance in the complex charge density wave regime of an antiferromagnetic Dirac semimetal
• On the magnetic structures of 1:1:1 stoichiometric topological phases LnSbTe (Ln = Pr, Nd, Dy and Er)
• Electronic structure in a rare-earth based nodal-line semimetal candidate PrSbTe
• Revealing a charge-density-wave gap in the predicted weak topological insulator HoSbTe
• Evidence for electronic signature of magnetic transition in topological magnet HoSbTe
• Large Negative Magnetoresistance in off-Stochiometric Topological Material PrSbTe
• Low-lying Electronic Structure of Rare-Earth Based Topological Nodal Line Semimetal Candidate DySbTe
• Spectroscopic Evidence on Realization of a Genuine Topological Nodal Line Semimetal in LaSbTe
• Electronic Structure of a Nodal Line Semimetal Candidate TbSbTe
• Electronic band structure of a nodal line semimetal candidate ErSbTe
• Evolution of Magnetoresistance in the magnetic topological semimetals NdSbxTe2-x
• Chalcogen Doping Effect on the Insulator-to-Metal Transition in GdPS