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Inherent spin density wave instability by vortices in superconductors with strong Pauli effects | | K. M. Suzuki
; M. Ichioka
; K. Machida
; | | Date: |
15 Sep 2010 | | Abstract: | A novel spin density wave (SDW) instability mechanism enhanced by vortices
under fields is proposed to explain the high field and low temperature (HL)
phase in CeCoIn$_5$. In the vortex state the strong Pauli effect and the nodal
gap conspire to enhance the momentum resolved spectral weight exclusively along
the nodal direction over the normal value, providing a favorable nesting
condition for SDW with ${f Q}=(2k_F, 2k_F, 0.5)$ only under high field ($H$).
Observed mysteries of the field-induced SDW confined within $H_{c2}$ are
understood consistently, such facts that ${f Q}$ is directed to the nodal
direction independent of $H$, SDW diminishes under tilting field from the $ab$
plane, and the SDW transition line in $(H,T)$ has a positive slope. | | Source: | arXiv, 1009.2821 | | Services: | Forum | Review | PDF | Favorites | |
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