论文标题
gav $ _ {4} $ s $ _ {8-y} $ se $ _ {y {y} $ gav $ _ {4} $ _ {4} $ _ {4}
Magnetism and Néel skyrmion dynamics in GaV$_{4}$S$_{8-y}$Se$_{y}$
论文作者
论文摘要
我们对低级化学替换对磁接地状态的影响和n {\'e} el Skyrmion lattice（SKL）状态在GAV $ _4 $ _4 $ s $ _ {8-Y Y} $ SE $ _Y $中，其中$ y = 0，0.1，7.9 $和8 $ $ _y $ _Y $ _ _4 $ _ _4 $ _ _4 $ _ {8-y} $ _y $。 $ y = 0 $和0.1材料的Muon-Spin光谱（$ $ $ SR）的测量结果表明，磁接地状态由显微镜共存的不稳定的环形和铁磁环境组成，而化学替代则导致了局部局部旋转密度的生长。 $μ$ $ $ SR的测量结果表明，该系列两端的低级替代均存在SKL。在取代样品中，天空敏捷的激发持续到平衡SKL以下的温度，这表明在广泛的温度下存在天空前体。
We present an investigation of the influence of low-levels of chemical substitution on the magnetic ground state and N{\' e}el skyrmion lattice (SkL) state in GaV$_4$S$_{8-y}$Se$_y$, where $y =0, 0.1, 7.9$, and $8$. Muon-spin spectroscopy ($μ$SR) measurements on $y=0$ and 0.1 materials reveal the magnetic ground state consists of microscopically coexisting incommensurate cycloidal and ferromagnetic environments, while chemical substitution leads to the growth of localized regions of increased spin density. $μ$SR measurements of emergent low-frequency skyrmion dynamics show that the SkL exists under low-levels of substitution at both ends of the series. Skyrmionic excitations persist to temperatures below the equilibrium SkL in substituted samples, suggesting the presence of skyrmion precursors over a wide range of temperatures.
