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20–23 Mar 2023
Campus Garching
Europe/Berlin timezone

Complex magnetic orders and the emergent topological Hall effect in the kagome metal ErMn$_6$Sn$_6$

23 Mar 2023, 11:30
20m
MW 2 001 - Lecture hall (Fakultät für Maschinenwesen)

MW 2 001 - Lecture hall

Fakultät für Maschinenwesen

680
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Talk (17 + 3 min) Magnetism, Superconductivity, Topological Systems, Magnetic Thin Films an other electronic phenomena Bulk Magnetism 2

Speaker

Mr Yishui Zhou (JCNS-MLZ, Forschungszentrum Jülich GmbH, Garching, Germany)

Description

Following the discovery of a quantum-limit magnetic Chern phase in TbMn$_6$Sn$_6$ [1], and the observation of a large topological Hall effect (THE) related to the field-induced magnetic phases in YMn$_6$Sn$_6$ [2], the magnetic topological metal series RMn$_6$Sn$_6$ (R=Gd-Yb, and Y, Lu etc.) [3], that possess an ideal kagome lattice of Mn, have emerged as a new platform to explore exotic states and novel functionalities. We have recently carried out the growth of high-quality single crystals of the magnetic kagome metal ErMn$_6$Sn$_6$ via the flux method, and the physical properties characterizations via the magnetic susceptibility, heat capacity and Hall conductivity measurements. We have also undertaken comprehensive neutron diffraction experiments on both single-crystal and powder samples at the WISH diffractometer at ISIS. A number of distinct magnetic ordered phases, including the spiral, conical and k = 0 magnetic orders, have been identified in cooling to low temperatures. Furthermore, we have also observed a range of complex field-induced magnetic phases, including the multi-k non-coplanar magnetic orders, via field-dependent single-crystal neutron diffraction at WISH. We have found that these complex field-induced magnetic phases are directly associated to our observed THE over a wide phase space of field and temperature in this compound. Our study has clearly hinted a fascinating interplay between topologically non-trivial electronic band structures, magnetism and electronic correlations in ErMn$_6$Sn$_6$.
[1] J. X. Yin, et al., Nature 583, 533 (2020).
[2] N. J. Ghimire, et al., Sci. Adv. 6, eabe2680 (2020).
[3] W. Ma, et al., Phys. Rev. Lett. 126, 246602 (2021).

Primary author

Mr Yishui Zhou (JCNS-MLZ, Forschungszentrum Jülich GmbH, Garching, Germany)

Co-authors

Dr Changjiang Yi (Max Planck Institute for Chemical Physics of Solids, Dresden, Germany) Dr Dmitry Khalyavin (ISIS Neutron & Muon Facility, STFC, Rutherford Appleton Laboratory, Didcot, UK) Dr Fabio Orlandi (ISIS Neutron & Muon Facility, STFC, Rutherford Appleton Laboratory, Didcot, UK) Dr Pascal Manuel (ISIS Neutron & Muon Facility, STFC, Rutherford Appleton Laboratory, Didcot, UK) Dr Sabreen Hammouda (JCNS-MLZ, Forschungszentrum Jülich GmbH, Garching, Germany) Dr Adrian Merritt (JCNS-MLZ, Forschungszentrum Jülich GmbH, Garching, Germany) Prof. Claudia Felser (Max Planck Institute for Chemical Physics of Solids, Dresden, Germany) Prof. Thomas Brückel (JCNS-2 & PGI-4, Forschungszentrum Jülich GmbH, Jülich, Germany) Dr Yixi Su (JCNS-MLZ, Forschungszentrum Jülich GmbH, Garching, Germany)

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