Two-dimensional Fermi liquid with attractive interactions.
Two-dimensional Fermi liquid with attractive interactions.
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DOI：
10.1103/physrevlett.109.130403
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发表时间：
2012-06
影响因子：
8.6
通讯作者：
B. Fröhlich;M. Feld;Enrico Vogt;M. Koschorreck;Michael Köhl;Christophe Berthod;T. Giamarchi
中科院分区：
文献类型：
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作者：
B. Fröhlich;M. Feld;Enrico Vogt;M. Koschorreck;Michael Köhl;Christophe Berthod;T. Giamarchi
我们实现并研究了一种吸引相互作用的二维费米液体。利用动量分辨光谱学测量了自能，确定了短程相互作用势的接触参数，并得到了它们与相互作用强度的依赖关系。我们成功地将测量结果与理论分析进行了比较，适当地考虑了有限温度、谐波陷阱和具有不同峰值密度的几种二维气体的平均。
We realize and study an attractively interacting two-dimensional Fermi liquid. Using momentum-resolved photoemission spectroscopy, we measure the self-energy, determine the contact parameter of the short-range interaction potential, and find their dependence on the interaction strength. We successfully compare the measurements to a theoretical analysis, properly taking into account the finite temperature, harmonic trap, and the averaging over several two-dimensional gases with different peak densities.