Publication

Article Metrics

Citations


Online attention

Topological electronic structure and intrinsic magnetization in MnBi 4 Te 7 : A Bi 2 Te 3 derivative with a periodic Mn sublattice

DOI: 10.1103/PhysRevX.9.041065 DOI Help

Authors: Raphael C. Vidal (Universität Würzburg; Würzburg-Dresden Cluster of Excellence ct.qmat) , Alexander Zeugner (Technische Universität Dresden) , Jorge I. Facio (Leibniz IFW Dresden) , Rajyavardhan Ray (Leibniz IFW Dresden) , M. Hossein Haghighi (Leibniz IFW Dresden) , Anja U. B. Wolter (Leibniz IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat) , Laura T. Corredor Bohorquez (Leibniz IFW Dresden) , Federico Caglieris (Leibniz IFW Dresden) , Simon Moser (Würzburg-Dresden Cluster of Excellence ct.qmat; Universität Würzburg; Advanced Light Source) , Tim Figgemeier (Universität Würzburg; Würzburg-Dresden Cluster of Excellence ct.qmat) , Thiago R. F. Peixoto (Universität Würzburg; Würzburg-Dresden Cluster of Excellence ct.qmat) , Hari Babu Vasili (ALBA Synchrotron Light Source) , Manuel Valvidares (ALBA Synchrotron Light Source) , Sungwon Jung (Diamond Light Source) , Cephise Cacho (Diamond Light Source) , Alexey Alfonsov (Leibniz IFW Dresden) , Kavita Mehlawat (Leibniz IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat) , Vladislav Kataev (Leibniz IFW Dresden) , Christian Hess (Leibniz IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat) , Manuel Richter (Leibniz IFW Dresden; Technische Universität Dresden) , Bernd Büchner (Leibniz IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat; Technische Universität Dresden) , Jeroen Van Den Brink (Leibniz IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat; Technische Universität Dresden) , Michael Ruck (Technische Universität Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat; Max Planck Institute for Chemical Physics of Solids) , Friedrich Reinert (Universität Würzburg; Würzburg-Dresden Cluster of Excellence ct.qmat) , Hendrik Bentmann (Universität Würzburg; Würzburg-Dresden Cluster of Excellence ct.qmat) , Anna Isaeva (Leibniz IFW Dresden; Würzburg-Dresden Cluster of Excellence ct.qmat; Technische Universität Dresden)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review X , VOL 9

State: Published (Approved)
Published: December 2019
Diamond Proposal Number(s): 22468

Open Access Open Access

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. MnBi 2 Te 4 has been established as the first antiferromagnetic topological insulator and constitutes the progenitor of a modular ( Bi 2 Te 3 ) n ( MnBi 2 Te 4 ) series. Here, for n = 1 , we confirm a nonstoichiometric composition proximate to MnBi 4 Te 7 . 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 MnBi 4 Te 7 ( 0001 ) surface, analogous to the nonmagnetic parent compound Bi 2 Te 3 . Our results establish MnBi 4 Te 7 as the first band-inverted compound with intrinsic net magnetization providing a versatile platform for the realization of magnetic topological states of matter.

Journal Keywords: Dirac fermions; Electronic structure; First-principles calculations; Magnetic susceptibility; Surface states; Topological materials

Subject Areas: Materials, Physics


Instruments: I05-ARPES

Other Facilities: Advanced Light Source

Documents:
ghnh55hgt.pdf

Discipline Tags:



Technical Tags: