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24 April 2024 |
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Nature of the A phase in CeCu2Si2 | | O Stockert
; E Faulhaber
; G Zwicknagl
; N Stüsser
; H S Jeevan
; M Deppe
; R Borth
; R Küchler
; M Loewenhaupt
; C Geibel
; F Steglich
; | | Date: |
2 Apr 2004 | | Journal: | Phys Rev Lett, 92 (13), 136401 | | Abstract: | Neutron diffraction experiments have been performed on a magnetically ordered CeCu2Si2 single crystal exhibiting A-phase anomalies in specific heat and thermal expansion. Below T(N) approximately 0.8 K antiferromagnetic superstructure peaks have been detected. The propagation vector of the magnetic order appears to be determined by the topology of the Fermi surface of heavy quasiparticles as indicated by renormalized band-structure calculations. The observation of long-range incommensurate antiferromagnetic order as the nature of the A phase in CeCu2Si2 suggests that a spin-density-wave instability is the origin of the quantum critical point in CeCu2Si2. | | Source: | PubMed, pmid15089634 | | Services: | Forum | Review | Favorites | |
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