Topological Electronic Structure and Intrinsic Magnetization in MnBi4Te7: A Bi2Te3 Derivative with a Periodic Mn Sublattice
Vidal RC, Zeugner A, Facio J, Ray R, Haghighi MH, Wolter AUB, Bohorquez LTC, Caglieris F, Moser S, Figgemeier T, Peixoto TRF, Vasili HB, Valvidares M, Jung S, Cacho C, Alfonsov A, Mehlawat K, Kataev V, Hess C, Richter M, Buechner B, Van Den Brink J, Ruck M, Reinert F, Bentmann H, Isaeva A (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 91
Article Number: 041065
Journal Issue: 4
DOI: 10.1103/PhysRevX.9.041065
Abstract
Combinations of nontrivial band topology and long-range magnetic order hold promise for realizations of novel spintronic phenomena, such as the quantum anomalous Hall effect and the topological magnetoelectric effect. Following theoretical advances, material candidates are emerging. Yet, so far a compound that combines a band-inverted electronic structure with an intrinsic net magnetization remains unrealized. MnBi2Te4 has been established as the first antiferromagnetic topological insulator and constitutes the progenitor of a modular (Bi2Te3)n(MnBi2Te4) series. Here, for n=1, we confirm a nonstoichiometric composition proximate to MnBi4Te7. We establish an antiferromagnetic state below 13 K followed by a state with a net magnetization and ferromagnetic-like hysteresis below 5 K. Angle-resolved photoemission experiments and density-functional calculations reveal a topologically nontrivial surface state on the MnBi4Te7(0001) surface, analogous to the nonmagnetic parent compound Bi2Te3. Our results establish MnBi4Te7 as the first band-inverted compound with intrinsic net magnetization providing a versatile platform for the realization of magnetic topological states of matter.
Involved external institutions
Julius-Maximilians-Universität Würzburg
Germany (DE)
Technische Universität Dresden
Germany (DE)
Complexity and Topology in Quantum Matter ct.qmat
Germany (DE)
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden
Germany (DE)
Diamond Light Source
United Kingdom (GB)
CELLS ALBA Synchrotron (Consorcio para la Construcción, Equipamiento y Explotación del Laboratorio de Luz de Sincrotrón)
Spain (ES)
Germany (DE)
Technische Universität Dresden
Germany (DE)
Complexity and Topology in Quantum Matter ct.qmat
Germany (DE)
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden
Germany (DE)
Diamond Light Source
United Kingdom (GB)
CELLS ALBA Synchrotron (Consorcio para la Construcción, Equipamiento y Explotación del Laboratorio de Luz de Sincrotrón)
Spain (ES)
How to cite
APA:
Vidal, R.C., Zeugner, A., Facio, J., Ray, R., Haghighi, M.H., Wolter, A.U.B.,... Isaeva, A. (2019). Topological Electronic Structure and Intrinsic Magnetization in MnBi4Te7: A Bi2Te3 Derivative with a Periodic Mn Sublattice. Physical Review X, 91(4). https://doi.org/10.1103/PhysRevX.9.041065
MLA:
Vidal, Raphael C., et al. "Topological Electronic Structure and Intrinsic Magnetization in MnBi4Te7: A Bi2Te3 Derivative with a Periodic Mn Sublattice." Physical Review X 91.4 (2019).
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