论文标题
在强烈相互作用的2D和3D电子气体中，铁磁量子临界点的不稳定性与任意自旋轨道分裂
Instability of the ferromagnetic quantum critical point in strongly interacting 2D and 3D electron gases with arbitrary spin-orbit splitting
论文作者
论文摘要
在这项工作中，我们在2D和3D电子气体中以任意自旋轨道分裂和较强的电子电子相互作用重新访问巡回的铁磁磁性。我们确定靠近费米表面的谐振散射过程，这些过程导致低温下铁磁量子临界点的不稳定性。与以前的理论研究相反，我们表明即使存在任意自旋轨道分裂，也无法完全抑制此类过程。接近相变的电子 - 电子相互作用的完全自以为是的非扰动处理表明，这些谐振过程始终破坏铁磁量子临界点的稳定，并导致一阶相变。这些过程的特征特征可以通过旋转易感性在远距离或接近相变的磁场上的非分析依赖性来测量。
In this work we revisit itinerant ferromagnetism in 2D and 3D electron gases with arbitrary spin-orbit splitting and strong electron-electron interaction. We identify the resonant scattering processes close to the Fermi surface that are responsible for the instability of the ferromagnetic quantum critical point at low temperatures. In contrast to previous theoretical studies, we show that such processes cannot be fully suppressed even in presence of arbitrary spin-orbit splitting. A fully self-consistent non-perturbative treatment of the electron-electron interaction close to the phase transition shows that these resonant processes always destabilize the ferromagnetic quantum critical point and lead to a first-order phase transition. Characteristic signatures of these processes can be measured via the non-analytic dependence of the spin susceptibility on magnetic field both far away or close to the phase transition.
