非对称自旋-轨道相互作用中临界自旋涨落引起的费米面形变和反常质量重整化
Deformation of the Fermi Surface and Anomalous Mass Renormalization by Critical Spin Fluctuations through Asymmetric Spin-Orbit Interaction
摘要:
结果表明,非对称自旋轨道相互作用的临界自旋涨落的影响是明显重整化。作为一个明确的例子,预测了Rashba型相互作用在热线附近被反铁磁临界涨落所抑制(或点),导致热线附近的费米面变形(或点)周围的能带分裂减少,而铁磁临界波动被证明是加强Rashba型相互作用的费米表面上的任何地方,导致频带分裂的增加。研究还发现,对于Rashba型相互作用产生的两个分裂带,多体质量重整化是相反的符号,它向磁量子临界点发散。这些预测原则上可以通过de Haas-van Alphen(dHvA)效应观察到。
英文摘要:
It is shown that an asymmetric spin-orbit interaction is appreciably renormalized by the effect of critical spin fluctuations. As an explicit example, the Rashba-type interaction is predicted to be suppressed by anti-ferromagnetic critical fluctuations near the hot line (or point), leading to a deformation of the Fermi surface near the hot line (or point) around which the band splitting is decreased, while ferromagnetic critical fluctuations are shown to enhance the Rashba-type interaction everywhere on the Fermi surface, leading to an increase in the band splitting. It is also found that the many-body mass renormalization, which diverges towards the magnetic quantum critical point, is in the opposite sign for the two split bands by the Rashba-type interaction. These predictions are observable by the de Haas-van Alphen (dHvA) effect in principle.
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