%0 Journal Article %1 PhysRevX.9.041065 %A Vidal, Raphael C. %A Zeugner, Alexander %A Facio, Jorge I. %A Ray, Rajyavardhan %A Haghighi, M. Hossein %A Wolter, Anja U. B. %A Corredor Bohorquez, Laura T. %A Caglieris, Federico %A Moser, Simon %A Figgemeier, Tim %A Peixoto, Thiago R. F. %A Vasili, Hari Babu %A Valvidares, Manuel %A Jung, Sungwon %A Cacho, Cephise %A Alfonsov, Alexey %A Mehlawat, Kavita %A Kataev, Vladislav %A Hess, Christian %A Richter, Manuel %A Büchner, Bernd %A van den Brink, Jeroen %A Ruck, Michael %A Reinert, Friedrich %A Bentmann, Hendrik %A Isaeva, Anna %D 2019 %I American Physical Society %J Phys. Rev. X %K a b %N 4 %P 041065 %R 10.1103/PhysRevX.9.041065 %T Topological electronic structure and intrinsic magnetization in MnBi$_4$Te$_7$: A Bi$_2$Te$_3$ derivative with a periodic Mn sublattice %U https://link.aps.org/doi/10.1103/PhysRevX.9.041065 %V 9 %X 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 ($Bi_2Te_3$)n($MnBi_2Te_4$) series. Here, for n=1, we confirm a nonstoichiometric composition proximate to $MnBi_4Te_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 $MnBi_4Te_7$(0001) surface, analogous to the nonmagnetic parent compound $Bi_2Te_3$. Our results establish $MnBi_4Te_7$ as the first band-inverted compound with intrinsic net magnetization providing a versatile platform for the realization of magnetic topological states of matter.

@article{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 ($Bi_2Te_3$)n($MnBi_2Te_4$) series. Here, for n=1, we confirm a nonstoichiometric composition proximate to $MnBi_4Te_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 $MnBi_4Te_7$(0001) surface, analogous to the nonmagnetic parent compound $Bi_2Te_3$. Our results establish $MnBi_4Te_7$ as the first band-inverted compound with intrinsic net magnetization providing a versatile platform for the realization of magnetic topological states of matter.}, added-at = {2020-03-20T11:58:05.000+0100}, author = {Vidal, Raphael C. and Zeugner, Alexander and Facio, Jorge I. and Ray, Rajyavardhan and Haghighi, M. Hossein and Wolter, Anja U. B. and Corredor Bohorquez, Laura T. and Caglieris, Federico and Moser, Simon and Figgemeier, Tim and Peixoto, Thiago R. F. and Vasili, Hari Babu and Valvidares, Manuel and Jung, Sungwon and Cacho, Cephise and Alfonsov, Alexey and Mehlawat, Kavita and Kataev, Vladislav and Hess, Christian and Richter, Manuel and B\"uchner, Bernd and van den Brink, Jeroen and Ruck, Michael and Reinert, Friedrich and Bentmann, Hendrik and Isaeva, Anna}, biburl = {https://www.bibsonomy.org/bibtex/23ab01d1710bc1bdc0bdad48ac79d9939/ctqmat}, day = 31, description = {Phys. Rev. X 9, 041065 (2019) - Topological Electronic Structure and Intrinsic Magnetization in ${\mathrm{MnBi}}_{4}{\mathrm{Te}}_{7}$: A ${\mathrm{Bi}}_{2}{\mathrm{Te}}_{3}$ Derivative with a Periodic Mn Sublattice}, doi = {10.1103/PhysRevX.9.041065}, interhash = {78f20bf6f67d48e0f0be070701351de3}, intrahash = {3ab01d1710bc1bdc0bdad48ac79d9939}, journal = {Phys. Rev. X}, keywords = {a b}, month = {12}, number = 4, numpages = {13}, pages = 041065, publisher = {American Physical Society}, timestamp = {2023-10-19T15:51:48.000+0200}, title = {Topological electronic structure and intrinsic magnetization in MnBi$_{\mathbf{4}}$Te$_{\mathbf{7}}$: A Bi$_{\mathbf{2}}$Te$_{\mathbf{3}}$ derivative with a periodic Mn sublattice}, url = {https://link.aps.org/doi/10.1103/PhysRevX.9.041065}, volume = 9, year = 2019 }