Topological crystalline antiferromagnetic state in tetragonal FeS

Abstract

Integration between magnetism and topology is an exotic phenomenon in condensed-matter physics. Here, we propose an exotic phase named topological crystalline antiferromagnetic state, in which antiferromagnetism intrinsically integrates with nontrivial topology, and we suggest such a state can be realized in tetragonal FeS. A combination of first-principles calculations and symmetry analyses shows that the topological crystalline antiferromagnetic state arises from band reconstruction induced by pair checker-board antiferromagnetic order together with band-gap opening induced by intrinsic spin-orbit coupling in tetragonal FeS. The topological crystalline antiferromagnetic state is protected by the product of fractional translation symmetry, mirror symmetry, and time-reversal symmetry, and present some unique features. In contrast to strong topological insulators, the topological robustness is surface-dependent. These findings indicate that non-trivial topological states could emerge in pure antiferromagnetic materials, which sheds new light on potential applications of topological properties in fast-developing antiferromagnetic spintronics.

8 pages, 6 figures

References in corpus (18)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Classification of topological insulators and superconductors in three spatial dimensions
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Topological Crystalline Insulators
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Surface States of the Topological Insulator Bi_{1-x}Sb_x
• Antiferromagnetic topological insulators
• Hourglass Fermions
• High-Tc superconductivity in FeSe at high pressure: Dominant hole carriers and enhanced spin fluctuations
• Möbius Kondo Insulators
• Topological Phases in the Single-Layer FeSe
• Antiferromagnetic ground state with pair-checkboard order in FeSe
• FeS: Structure and Composition Relations to Superconductivity and Magnetism
• Coexistence of low moment magnetism and superconductivity in tetragonal FeS and suppression of $T_{\mathrm{c}}$ under pressure
• Robustness of superconductivity to competing magnetic phases in tetragonal FeS
• Spin excitations and the Fermi surface of superconducting FeS

Cited by in corpus (7)

• Topological quantum states of matter in iron-based superconductors: From concepts to material realization
• Quantum Magnetism in Minerals
• Unusual change in the Dirac-cone energy band upon two-step magnetic transition in CeBi
• Emergent vortex Majorana zero mode in iron-based superconductors
• The anomalous antiferromagnetic topological phase in pressurized SmB6
• Boundary states in the chiral symmetric systems with a spatial symmetry
• Topological Aspects of Antiferromagnets