$$\mathrm{^{239}Pu}$$ nuclear magnetic resonance in the candidate topological insulator $$\mathrm{PuB_4}$$
Abstract
In this article, we present a detailed nuclear magnetic resonance (NMR) study of $$\mathrm{^{239}Pu}$$ in bulk and powdered single-crystal plutonium tetraboride ($$\mathrm{PuB_4}$$), which has recently been investigated as a potential correlated topological insulator. This study constitutes the second-ever observation of the $$\mathrm{^{239}Pu}$$ NMR signal, and provides unique on-site sensitivity to the rich $$f$$-electron physics and insight into the bulk gaplike behavior in $$\mathrm{PuB_4}$$. The $$\mathrm{^{239}Pu}$$ NMR spectra are consistent with axial symmetry of the shift tensor showing for the first time that $$\mathrm{^{239}Pu}$$ NMR can be observed in an anisotropic environment and up to room temperature. The temperature dependence of the $$\mathrm{^{239}Pu}$$ shift, combined with a relatively long spin-lattice relaxation time ($$T_1$$), indicate that $$\mathrm{PuB_4}$$ adopts a nonmagnetic state with gaplike behavior consistent with our density functional theory calculations. The temperature dependencies of the NMR Knight shift and $$T_1^{1}$$ –microscopic quantities sensitive only to bulk states–imply bulk gaplike behavior confirming that $$\mathrm{PuB_4}$$ is a good candidate topological insulator. The large contrast between the $$\mathrm{^{239}Pu}$$ orbital shifts in the ionic insulator $$\mathrm{PuO_2} (\sim {+24.7 }\%)$$ and $$\mathrm{PuB_4} (\sim-0.5\%)$$ provides a new tool to investigate the nature of chemical bonding in plutonium materials.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Leibniz Institute for Solid State and Materials Research (IFW) Dresden (Germany)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Japan Atomic Energy Agency, Tokai, Naka (Japan)
- Florida State Univ., Tallahassee, FL (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Actinide Science & Technology (CAST); Florida State Univ., Tallahassee, FL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1566685
- Alternate Identifier(s):
- OSTI ID: 1489316
- Grant/Contract Number:
- SC0016568
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 3; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear; defects; mechanical behavior; corrosion; charge transport; superconductivity; magnetism and spin physics; separations; geophysics/geochemistry; materials and chemistry by design; synthesis (novel materials); synthesis (self-assembly); synthesis (predictive); synthesis (scalable processing)
Citation Formats
Dioguardi, A. P., Yasuoka, H., Thomas, S. M., Sakai, H., Cary, S. K., Kozimor, S. A., Albrecht-Schmitt, T. E., Choi, H. C., Zhu, J. -X., Thompson, J. D., Bauer, E. D., and Ronning, F. $\mathrm{^{239}Pu}$ nuclear magnetic resonance in the candidate topological insulator $\mathrm{PuB_4}$. United States: N. p., 2019.
Web. doi:10.1103/physrevb.99.035104.
Dioguardi, A. P., Yasuoka, H., Thomas, S. M., Sakai, H., Cary, S. K., Kozimor, S. A., Albrecht-Schmitt, T. E., Choi, H. C., Zhu, J. -X., Thompson, J. D., Bauer, E. D., & Ronning, F. $\mathrm{^{239}Pu}$ nuclear magnetic resonance in the candidate topological insulator $\mathrm{PuB_4}$. United States. https://doi.org/10.1103/physrevb.99.035104
Dioguardi, A. P., Yasuoka, H., Thomas, S. M., Sakai, H., Cary, S. K., Kozimor, S. A., Albrecht-Schmitt, T. E., Choi, H. C., Zhu, J. -X., Thompson, J. D., Bauer, E. D., and Ronning, F. Wed .
"$\mathrm{^{239}Pu}$ nuclear magnetic resonance in the candidate topological insulator $\mathrm{PuB_4}$". United States. https://doi.org/10.1103/physrevb.99.035104. https://www.osti.gov/servlets/purl/1566685.
@article{osti_1566685,
title = {$\mathrm{^{239}Pu}$ nuclear magnetic resonance in the candidate topological insulator $\mathrm{PuB_4}$},
author = {Dioguardi, A. P. and Yasuoka, H. and Thomas, S. M. and Sakai, H. and Cary, S. K. and Kozimor, S. A. and Albrecht-Schmitt, T. E. and Choi, H. C. and Zhu, J. -X. and Thompson, J. D. and Bauer, E. D. and Ronning, F.},
abstractNote = {In this article, we present a detailed nuclear magnetic resonance (NMR) study of $\mathrm{^{239}Pu}$ in bulk and powdered single-crystal plutonium tetraboride ($\mathrm{PuB_4}$), which has recently been investigated as a potential correlated topological insulator. This study constitutes the second-ever observation of the $\mathrm{^{239}Pu}$ NMR signal, and provides unique on-site sensitivity to the rich $f$-electron physics and insight into the bulk gaplike behavior in $\mathrm{PuB_4}$. The $\mathrm{^{239}Pu}$ NMR spectra are consistent with axial symmetry of the shift tensor showing for the first time that $\mathrm{^{239}Pu}$ NMR can be observed in an anisotropic environment and up to room temperature. The temperature dependence of the $\mathrm{^{239}Pu}$ shift, combined with a relatively long spin-lattice relaxation time ($T_1$), indicate that $\mathrm{PuB_4}$ adopts a nonmagnetic state with gaplike behavior consistent with our density functional theory calculations. The temperature dependencies of the NMR Knight shift and $T_1^{1}$ –microscopic quantities sensitive only to bulk states–imply bulk gaplike behavior confirming that $\mathrm{PuB_4}$ is a good candidate topological insulator. The large contrast between the $\mathrm{^{239}Pu}$ orbital shifts in the ionic insulator $\mathrm{PuO_2} (\sim {+24.7 }\%)$ and $\mathrm{PuB_4} (\sim-0.5\%)$ provides a new tool to investigate the nature of chemical bonding in plutonium materials.},
doi = {10.1103/physrevb.99.035104},
journal = {Physical Review B},
number = 3,
volume = 99,
place = {United States},
year = {Wed Jan 02 00:00:00 EST 2019},
month = {Wed Jan 02 00:00:00 EST 2019}
}
Web of Science
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