近藤晶格中电子-电子相互作用引起的磁序
Magnetic Order in Kondo-Lattice Systems due to Electron-Electron Interactions
摘要：
当核自旋处于无序状态时，电子自旋与核自旋之间的超精细相互作用是自旋量子比特退相干的主要来源之一。后者的排序在很大程度上抑制了这种退相干的来源。在这里，我们表明，这样的顺序可以发生通过热力学相变在二维（2D）近藤晶格型系统。我们特别关注嵌入在2D电子气中的核自旋。核自旋通过电子气携带的RKKY相互作用相互作用。我们表明，在有限温度下的核磁序依赖于由于电子-电子相互作用的二维静态电子自旋磁化率的异常行为。这提供了低维磁性和非解析性之间的相互作用的二维电子系统的连接。我们讨论了核磁性的条件，并表明，相关的居里温度随着电子-电子相互作用的增加，并可能达到毫开尔文制度。进一步减少到一维的维数是简短的讨论。
英文摘要：
The hyperfine interaction between the electron spin and the nuclear spins is one of the main sources of decoherence for spin qubits when the nuclear spins are disordered. An ordering of the latter largely suppresses this source of decoherence. Here we show that such an ordering can occur through a thermodynamic phase transition in two-dimensional (2D) Kondo-lattice type systems. We specifically focus on nuclear spins embedded in a 2D electron gas. The nuclear spins interact with each other through the RKKY interaction, which is carried by the electron gas. We show that a nuclear magnetic order at finite temperature relies on the anomalous behavior of the 2D static electron spin susceptibility due to electron-electron interactions. This provides a connection between low-dimensional magnetism and non-analyticities in interacting 2D electron systems. We discuss the conditions for nuclear magnetism, and show that the associated Curie temperature increases with the electron-electron interactions and may reach up into the millikelvin regime. The further reduction of dimensionality to one dimension is shortly discussed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
