# Inherent spin density wave instability by vortices in superconductors with strong Pauli effects

Source: [Inherent spin density wave instability by vortices in superconductors with strong Pauli effects](<https://www.sota2.com/research/paper/68fa2a3e1e209131ce83bc55>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T13:25:22.533Z

Authors: K. M. Suzuki, M. Ichioka, K. Machida

Published: 2010-09-15T03:03:39.000Z

## 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 ${\\bf Q}=(2k\_F, 2k\_F, 0.5)$ only under high field ($H$). Observed mysteries of the field-induced SDW confined within $H\_{c2}$ are understood consistently, such facts that ${\\bf Q}$ 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.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1009.2821>)

[PDF](<https://arxiv.org/pdf/1009.2821.pdf>)