Dynamics of commensurate chromium alloys

R. S. Fishman; S. H. Liu

doi:10.1103/PhysRevB.50.4240

Dynamics of commensurate chromium alloys

R. S. Fishman, S. H. Liu

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The dynamics of commensurate chromium alloys are produced by the fluctuations of a spin-density wave consisting of bound electron-hole pairs. For a commensurate alloy at any temperature, we find a transverse spin-wave (SW) mode with frequency ω=cq and a longitudinal amplitude mode with dispersion ω=2Δ2+(cq)2/4, where c=vF/3 is the SW mode velocity and 2Δ is the energy required to break apart an electron-hole pair. Unlike in an itinerant ferromagnet, the SW and amplitude modes never intersect. Other fluctuations below the SW mode and above the amplitude mode are intrinsically damped in an itinerant antiferromagnet.

Original language	English
Pages (from-to)	4240-4243
Number of pages	4
Journal	Physical Review B
Volume	50
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.50.4240
State	Published - 1994
Externally published	Yes

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abstract = "The dynamics of commensurate chromium alloys are produced by the fluctuations of a spin-density wave consisting of bound electron-hole pairs. For a commensurate alloy at any temperature, we find a transverse spin-wave (SW) mode with frequency ω=cq and a longitudinal amplitude mode with dispersion ω=2Δ2+(cq)2/4, where c=vF/3 is the SW mode velocity and 2Δ is the energy required to break apart an electron-hole pair. Unlike in an itinerant ferromagnet, the SW and amplitude modes never intersect. Other fluctuations below the SW mode and above the amplitude mode are intrinsically damped in an itinerant antiferromagnet.",

author = "Fishman, {R. S.} and Liu, {S. H.}",

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AB - The dynamics of commensurate chromium alloys are produced by the fluctuations of a spin-density wave consisting of bound electron-hole pairs. For a commensurate alloy at any temperature, we find a transverse spin-wave (SW) mode with frequency ω=cq and a longitudinal amplitude mode with dispersion ω=2Δ2+(cq)2/4, where c=vF/3 is the SW mode velocity and 2Δ is the energy required to break apart an electron-hole pair. Unlike in an itinerant ferromagnet, the SW and amplitude modes never intersect. Other fluctuations below the SW mode and above the amplitude mode are intrinsically damped in an itinerant antiferromagnet.

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Dynamics of commensurate chromium alloys

Abstract

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