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Title: Strength and scales of itinerant spin fluctuations in 3 d 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:
 [1];  [1];  [1]
  1. 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. https://doi.org/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}
}

Journal Article:

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Cited by: 2 works
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