Strength and scales of itinerant spin fluctuations in paramagnetic metals
Abstract
The full spin density fluctuations (SDF) spectra in 3d paramagnetic metals are analyzed from first principles using the linear response technique. Using the calculated complete wave vector and energy dependence of the dynamic spin susceptibility, we obtain the most important, but elusive, characteristic of SDF in solids: on-site spin correlator (SC). We demonstrate that the SDF have a mixed character consisting of interacting collective and single-particle excitations of similar strength spreading continuously over the entire Brillouin zone and a wide energy range up to femtosecond time scales. These excitations cannot be adiabatically separated and their intrinsically multiscale nature should always be taken into account for a proper description of metallic systems. Altogether, in all studied systems, despite the lack of local moment, we found a very large SC resulting in an effective fluctuating moment of the order of several Bohr magnetons.
- Authors:
-
- Ames Lab., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1335032
- Alternate Identifier(s):
- OSTI ID: 1328568
- Report Number(s):
- IS-J-9133
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 14; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Wysocki, Aleksander L., Kutepov, Andrey, and Antropov, Vladimir P. Strength and scales of itinerant spin fluctuations in 3d paramagnetic metals. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.140405.
Wysocki, Aleksander L., Kutepov, Andrey, & Antropov, Vladimir P. Strength and scales of itinerant spin fluctuations in 3d paramagnetic metals. United States. https://doi.org/10.1103/PhysRevB.94.140405
Wysocki, Aleksander L., Kutepov, Andrey, and Antropov, Vladimir P. Mon .
"Strength and scales of itinerant spin fluctuations in 3d paramagnetic metals". United States. https://doi.org/10.1103/PhysRevB.94.140405. https://www.osti.gov/servlets/purl/1335032.
@article{osti_1335032,
title = {Strength and scales of itinerant spin fluctuations in 3d paramagnetic metals},
author = {Wysocki, Aleksander L. and Kutepov, Andrey and Antropov, Vladimir P.},
abstractNote = {The full spin density fluctuations (SDF) spectra in 3d paramagnetic metals are analyzed from first principles using the linear response technique. Using the calculated complete wave vector and energy dependence of the dynamic spin susceptibility, we obtain the most important, but elusive, characteristic of SDF in solids: on-site spin correlator (SC). We demonstrate that the SDF have a mixed character consisting of interacting collective and single-particle excitations of similar strength spreading continuously over the entire Brillouin zone and a wide energy range up to femtosecond time scales. These excitations cannot be adiabatically separated and their intrinsically multiscale nature should always be taken into account for a proper description of metallic systems. Altogether, in all studied systems, despite the lack of local moment, we found a very large SC resulting in an effective fluctuating moment of the order of several Bohr magnetons.},
doi = {10.1103/PhysRevB.94.140405},
journal = {Physical Review B},
number = 14,
volume = 94,
place = {United States},
year = {2016},
month = {10}
}
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