28 August 2022 to 2 September 2022
Science and Technology Campus, University of Parma
Europe/Rome timezone
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Intriguing Topological Kagome Magnetism of TbMn$_6$Sn$_6$

O-49
2 Sept 2022, 11:40
20m
Science and Technology Campus, University of Parma

Science and Technology Campus, University of Parma

University of Parma, Italy
Oral Strongly correlated electron systems Oral contributions

Speaker

Charles Mielke III (Paul Scherrer Institut)

Description

Magnetic topological phases of quantum matter are an emerging frontier in physics and material science [1-6], of which kagome magnets appear as a highly promising platform. Here, we explore magnetic correlations in the recently identified topological kagome system TbMn$_{6}$Sn$_{6}$ using $\mu$SR, combined with local field analysis and neutron diffraction [1,4]. Our studies identify an out-of-plane ferrimagnetic structure with slow magnetic fluctuations which exhibit a critical slowing down below T$^{*}_{C1}\simeq$ 120 K and finally freeze into static patches with ideal out-of-plane order below T$_{C1}\simeq$ 20 K. The appearance of the static patches sets in at a similar temperature as the appearance of topological transport behaviors. We further show that a hydrostatic pressure of 2.1 GPa stabilizes the static out-of-plane topological ferrimagnetic ground state in the whole volume of the sample. Therefore the exciting perspective arises of a magnetically-induced topological system whose magnetism can be controlled through external control parameters. The present results [4] will stimulate theoretical investigations to obtain a microscopic understanding of the relation between the low-temperature volume-wise magnetic evolution of the static $c$-axis ferrimagnetic patches and the topological electronic properties in TbMn$_{6}$Sn$_{6}$.

[1] J.-X. Yin et al., Nature $\textbf{583}$, 533-536 (2020).
[2] Z. Guguchia et al., Nature Comm. $\textbf{11}$, 559 (2020).
[3] N.J. Ghimire and I.I. Mazin, Nature Materials $\textbf{19}$, 137-138 (2020).
[4] C. Mielke III et al., arXiv:2101.05763 (2021).
[5] C. Mielke III et al., Phys. Rev. Materials $\textbf{5}$, 034803 (2021).
[6] C. Mielke III et al. … Z. Guguchia, Nature $\textbf{602}$, 245-250 (2022).

Primary authors

Charles Mielke III (Paul Scherrer Institut) Dr Zurab Guguchia (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland)

Co-authors

Dr Debarchan Das (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, Switzerland) Dr S.S. Tsirkin (Department of Physics, University of Z¨urich, Winterthurerstrasse 190, Zurich, Switzerland) Mr T.A. Cochran (Laboratory for Topological Quantum Matter and Spectroscopy, Department of Physics, Princeton University, Princeton, New Jersey 08544, USA) Dr Ritu Gupta (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland) Dr Chennan Wang (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland) Dr Rustem Khasanov (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland) Prof. Titus Neupert (Physik-Institut, Universit¨at Z¨urich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland) Dr Alex Amato (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland) Prof. M.Z. Hasan (Laboratory for Topological Quantum Matter and Spectroscopy, Department of Physics, Princeton University, Princeton, New Jersey 08544, USA) Wen Long Ma S Sturniolo Vladimir Pomjakushin Dr H. Luetkens (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland) Prof. S. Jia (CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Science, Beijing, China) V Ukleev X Liu Jonathan White J.-X. Yin C. B. Larsen V Poree J Chang M Medarde Z. Q. Wang L. Liborio

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