Partially filled Landau levels host competing electronic orders. For example, electron solids may prevail close to integer filling of the Landau levels before giving way to fractional quantum Hall liquids at higher carrier density^1,2. Here, we report the observation of an electron solid with non-collinear spin texture in monolayer graphene, consistent with solidification of skyrmions³—topological spin textures characterized by quantized electrical charge^4,5. We probe the spin texture of the solids using a modified Corbino geometry that allows ferromagnetic magnons to be launched and detected^6,7. We find that magnon transport is highly efficient when one Landau level is filled (\(\nu =1\)), consistent with quantum Hall ferromagnetic spin polarization. However, even minimal doping immediately quenches the magnon signal while leaving the vanishing low-temperature charge conductivity unchanged. Our results can be understood by the formation of a solid of charged skyrmions near \(\nu =1\), whose non-collinear spin texture leads to rapid magnon decay. Data near fractional fillings show evidence of several fractional skyrmion solids, suggesting that graphene hosts a highly tunable landscape of coupled spin and charge orders.

Landau部分填充的水平托管竞争的电子订单。例如，在让位于较高载流子密度^1,2的分数量子霍尔液体之前，电子固体可能会接近Landau能级的整数填充。在这里，我们报告了在单层石墨烯中具有非共线自旋纹理的电子固体的观察结果，这与skyrmions ^3的凝固相一致-以定量电荷^4,5为特征的拓扑自旋纹理。我们使用改进的Corbino几何形状探测固体的自旋织构，该几何形状允许发射和检测铁磁性磁振子^6,7。我们发现当填满一个Landau层（\（\ nu = 1 \）时，磁振子传输是高效的），与量子霍尔铁磁自旋极化一致。但是，即使极少的掺杂也会立即使磁振子信号淬灭，同时使消失的低温电荷电导率保持不变。我们的结果可以通过在\（\ nu = 1 \）附近形成带电的天体的固体来理解，其非共线的自旋纹理导致快速的磁振子衰变。分数填充物附近的数据显示出几种分数的Skyrmion固体的证据，表明石墨烯具有高度可调谐的自旋和电荷顺序耦合态势。