Abstract
Manganese telluride (MnTe) is a prospective platform for ultrafast carrier dynamics, spin-based thermoelectrics, and magnon-drag transport due to its unique electronic and magnetic properties. We use inelastic neutron scattering to study both pure and lithium-doped MnTe, focusing on the influence of doping in opening a magnon gap. We use neutron powder diffraction to determine critical exponents for the phase transition in both pure and Li-doped MnTe and complement this information with muon spin rotation/relaxation. The opening of the magnon gap and spin reorientation in Li-doped MnTe is mainly due to increased magnetic anisotropy along the [001] axis, a feature not present in pure MnTe.
| Original language | English |
|---|---|
| Article number | 214434 |
| Journal | Physical Review B |
| Volume | 109 |
| Issue number | 21 |
| DOIs | |
| State | Published - Jun 1 2024 |
Funding
This work was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Portions of this research used resources at the Spallation Neutron Source and High Flux Isotope Reactor, which is a U.S. DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. We acknowledge the assistance of D. L. Abernathy, K. M. Taddei, and S. Calder for neutron data acquisition. Work by B.A.F., C.Z.S., and E.Z. was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences (DOE-BES), through Award No. DE-SC0021134. We acknowledge the use of the muon facility at TRIUMF Lab and thank the TRIUMF staff for their assistance with the experiments. M.M.H.P. and D.V. acknowledge the financial support provided by the Air Force Office of Scientific Research (AFOSR) under Contract No. FA9550-23-1-0302, and the National Science Foundation (NSF) under Grant No. CBET-2110603. ORNL is managed by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 for the U.S. Department of Energy (DOE). The U.S. government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for U.S. government purposes.