Robust antiferromagnetic spin waves across the metal-insulator transition in hole-doped
Abstract
BaMn2 As2 is an antiferromagnetic insulator where a metal-insulator transition occurs with hole doping via the substitution of Ba with K. The metal-insulator transition causes only a small suppression of the Néel temperature (TN) and the ordered moment, suggesting that doped holes interact weakly with the Mn spin system. Powder inelastic neutron scattering measurements were performed on three different samples of Ba1 - xKxMn2 As2 with x = 0 , 0.125, and 0.25 to study the effect of hole doping and metallization on the spin dynamics. We compare the neutron intensities to a linear spin-wave theory approximation to the J1 $$-$$ J2 $$-$$ Jc Heisenberg model. Hole doping is found to introduce only minor modifications to the exchange energies and spin gap. Lastly, the changes observed in the exchange constants are consistent with the small drop of TN with doping.
- Authors:
-
- Istanbul Technical Univ., Maslak, Istanbul (Turkey). Dept. of Physics Engineering; Scientific and Technological Research Council of Turkey (Tubitak), Ankara (Turkey)
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1368057
- Alternate Identifier(s):
- OSTI ID: 1361115; OSTI ID: 1412047
- Report Number(s):
- IS-J-9353
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1702751
- Grant/Contract Number:
- AC02-07CH11358; AC05-00OR22725
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 22; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Ramazanoglu, M., Sapkota, A., Pandey, Abhishek, Lamsal, J., Abernathy, Douglas L., Niedziela, Jennifer L., Stone, Matthew B., Kreyssig, A., Goldman, A. I., Johnston, D. C., and McQueeney, Robert John. Robust antiferromagnetic spin waves across the metal-insulator transition in hole-doped BaMn2As2. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.95.224401.
Ramazanoglu, M., Sapkota, A., Pandey, Abhishek, Lamsal, J., Abernathy, Douglas L., Niedziela, Jennifer L., Stone, Matthew B., Kreyssig, A., Goldman, A. I., Johnston, D. C., & McQueeney, Robert John. Robust antiferromagnetic spin waves across the metal-insulator transition in hole-doped BaMn2As2. United States. https://doi.org/10.1103/PhysRevB.95.224401
Ramazanoglu, M., Sapkota, A., Pandey, Abhishek, Lamsal, J., Abernathy, Douglas L., Niedziela, Jennifer L., Stone, Matthew B., Kreyssig, A., Goldman, A. I., Johnston, D. C., and McQueeney, Robert John. 2017.
"Robust antiferromagnetic spin waves across the metal-insulator transition in hole-doped BaMn2As2". United States. https://doi.org/10.1103/PhysRevB.95.224401. https://www.osti.gov/servlets/purl/1368057.
@article{osti_1368057,
title = {Robust antiferromagnetic spin waves across the metal-insulator transition in hole-doped BaMn2As2},
author = {Ramazanoglu, M. and Sapkota, A. and Pandey, Abhishek and Lamsal, J. and Abernathy, Douglas L. and Niedziela, Jennifer L. and Stone, Matthew B. and Kreyssig, A. and Goldman, A. I. and Johnston, D. C. and McQueeney, Robert John},
abstractNote = {BaMn2 As2 is an antiferromagnetic insulator where a metal-insulator transition occurs with hole doping via the substitution of Ba with K. The metal-insulator transition causes only a small suppression of the Néel temperature (TN) and the ordered moment, suggesting that doped holes interact weakly with the Mn spin system. Powder inelastic neutron scattering measurements were performed on three different samples of Ba1 - xKxMn2 As2 with x = 0 , 0.125, and 0.25 to study the effect of hole doping and metallization on the spin dynamics. We compare the neutron intensities to a linear spin-wave theory approximation to the J1 $-$ J2 $-$ Jc Heisenberg model. Hole doping is found to introduce only minor modifications to the exchange energies and spin gap. Lastly, the changes observed in the exchange constants are consistent with the small drop of TN with doping.},
doi = {10.1103/PhysRevB.95.224401},
url = {https://www.osti.gov/biblio/1368057},
journal = {Physical Review B},
issn = {2469-9950},
number = 22,
volume = 95,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}
Web of Science
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