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arXiv 2008.07535cond-mat.str-el
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测量Stoner模型:用人工规范场设计非常规金属铁磁性

Gauging away the Stoner model: Engineering unconventional metallic ferromagnetism with artificial gauge fields

Joshuah T. Heath, Kevin S. Bedell

摘要:

近一个世纪以来,斯通纳模型一直主导着巡回铁磁性的研究,但最近对超冷、光学捕获费米气体的研究表明,自旋的相分离与长程磁序无关。本文研究了具有弱非零规范场的Landau-Fermi液体中Stoner判据的破缺。由于类似于Kohn的金属-绝缘体转变理论的过程,我们发现在没有非准粒子贡献的情况下,费米液相的稳定性强烈依赖于混合分波的朗道参数。我们的工作铺平了道路的描述新的自旋电子硬件的语言朗道费米液体输运。

英文摘要:

For nearly a century, the Stoner model has dominated research in itinerant ferromagnetism, yet recent work on ultracold, optically trapped Fermi gases suggests that phase separation of spins occurs independent of long-range magnetic order. In this paper, we consider the breakdown of the Stoner criterion in a Landau-Fermi liquid with weak non-zero gauge field. Due to a process analogous to Kohn's theory of a metal-insulator transition, we find the stability of a Fermi liquid phase in the absence of non-quasiparticle contributions to the response is strongly dependent on Landau parameters of mixed partial waves. Our work paves the way for the description of novel spintronic hardware in the language of Landau-Fermi liquid transport.

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。

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