当前位置: X-MOL 学术Nat. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Quantum electron liquid and its possible phase transition
Nature Materials ( IF 41.2 ) Pub Date : 2022-09-29 , DOI: 10.1038/s41563-022-01353-8
Sunghun Kim 1 , Joonho Bang 2 , Chan-Young Lim 1 , Seung Yong Lee 2 , Jounghoon Hyun 1 , Gyubin Lee 1 , Yeonghoon Lee 1 , Jonathan D Denlinger 3 , Soonsang Huh 4, 5 , Changyoung Kim 4, 5 , Sang Yong Song 6 , Jungpil Seo 6 , Dinesh Thapa 7 , Seong-Gon Kim 7 , Young Hee Lee 2, 8 , Yeongkwan Kim 1 , Sung Wng Kim 2, 8
Affiliation  

Purely quantum electron systems exhibit intriguing correlated electronic phases by virtue of quantum fluctuations in addition to electron–electron interactions. To realize such quantum electron systems, a key ingredient is dense electrons decoupled from other degrees of freedom. Here, we report the discovery of a pure quantum electron liquid that spreads up to ~3 Å in a vacuum on the surface of an electride crystal. Its extremely high electron density and weak hybridization with buried atomic orbitals show the quantum and pure nature of the electrons, which exhibit a polarized liquid phase, as demonstrated by our spin-dependent measurement. Furthermore, upon enhancing the electron correlation strength, the dynamics of the quantum electrons change to that of a non-Fermi liquid along with an anomalous band deformation, suggestive of a transition to a hexatic liquid crystal phase. Our findings develop the frontier of quantum electron systems and serve as a platform for exploring correlated electronic phases in a pure fashion.



中文翻译:

量子电子液体及其可能的相变

除了电子 - 电子相互作用之外,纯量子电子系统还凭借量子涨落表现出有趣的相关电子相。为了实现这样的量子电子系统,一个关键因素是与其他自由度解耦的致密电子。在这里,我们报告了一种纯量子电子液体的发现,该液体在真空中在电子晶体表面上扩散高达 ~3 Å。其极高的电子密度和与掩埋原子轨道的弱杂化显示了电子的量子和纯性质,它们表现出极化的液相,正如我们的自旋相关测量所证明的那样。此外,随着电子相关强度的增强,量子电子的动力学随着异常能带变形而变为非费米液体的动力学,暗示向六方液晶相的转变。我们的研究结果开拓了量子电子系统的前沿,并作为以纯方式探索相关电子相的平台。

更新日期:2022-09-30
down
wechat
bug