Magnon gap tuning in lithium-doped MnTe

Yumnam, George; Moseley, Duncan H.; Paddison, Joseph M.; Suggs, Christiana Z.; Zappala, Emma; Parker, David S.; Granroth, Garrett E.; Morris, Gerald D.; Polash, Md Hossain; Vashaee, Daryoosh; McGuire, Michael A.; Zhao, Huaizhou; Manley, Michael E.; Frandsen, Benjamin A.; Hermann, Raphaël P.

doi:10.1103/physrevb.109.214434

Magnon gap tuning in lithium-doped MnTe

Journal Article · Mon Jun 24 00:00:00 EDT 2024 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.109.214434· OSTI ID:2397458

^[1]; ^[1]; ^[1]; ^[2]; Zappala, Emma ^[2]; ^[1]; ^[1]; Morris, Gerald D. ^[3]; ^[4]; ^[4]; McGuire, Michael A. ^[1]; Zhao, Huaizhou ^[5]; ^[1]; ^[2]; ^[1]

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Brigham Young Univ., Provo, UT (United States)
TRIUMF, Vancouver, BC (Canada)
North Carolina State University, Raleigh, NC (United States)
Chinese Academy of Sciences (CAS), Beijing (China). Institute of Physics

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. In conclusion, 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.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF)

Grant/Contract Number:: AC05-00OR22725; SC0021134

OSTI ID:: 2397458

Alternate ID(s):: OSTI ID: 2473320

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 21 Vol. 109; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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