Breaking electron pairs in the pseudogap regime of SmTiO3-SrTiO3-SmTiO3 quantum wells
Breaking electron pairs in the pseudogap regime of SmTiO3-SrTiO3-SmTiO3 quantum wells
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SmTiO3-SrTiO3-SmTiO3 量子阱赝能隙区域中电子对的断裂
DOI：
10.1103/physrevb.108.l201118
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发表时间：
2023
影响因子：
3.7
通讯作者：
Levy, Jeremy
中科院分区：
文献类型：
--
作者：
Wu, Xinyi;Chen, Lu;Li, Arthur;Briggeman, Megan;Marshall, Patrick B.;Stemmer, Susanne;Irvin, Patrick;Levy, Jeremy
当量子阱宽度足够窄时，强关联二维量子阱内电子液体呈现赝能隙相。使用低温运输和光学实验，驱动量子阱系统的平衡，我们发现的证据移动的，长寿命的，带负电荷的准粒子，与赝能隙相位产生强束缚电子对的想法一致。这些实验结果建立了量子限制和增强的电子配对之间的联系，这可能为更高温度的超导体提供一条途径。
The strongly correlated two-dimensional electron liquid withinquantum well structures exhibits a pseudogap phase when the quantum well width is sufficiently narrow. Using low-temperature transport and optical experiments that drive the quantum-well system out of equilibrium, we find evidence of mobile, long-lived, negatively charged quasiparticles, consistent with the idea that the pseudogap phase arises from strongly bound electron pairs. These experimental results establish a connection between quantum confinement and enhanced electron pairing, which may provide a pathway to higher-temperature superconductors.