Emergent charge order near the doping-induced Mott-insulating quantum phase transition in Sr3Ru2O7
Emergent charge order near the doping-induced Mott-insulating quantum phase transition in Sr3Ru2O7
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DOI：
10.1038/s42005-019-0138-4
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发表时间：
2019-03
影响因子：
5.5
通讯作者：
Justin Leshen;Mariam Kavai;I. Giannakis;Y. Kaneko;Y. Tokura;S. Mukherjee;Wei‐Cheng Lee;P. Aynajian
中科院分区：
文献类型：
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作者：
Justin Leshen;Mariam Kavai;I. Giannakis;Y. Kaneko;Y. Tokura;S. Mukherjee;Wei‐Cheng Lee;P. Aynajian
寻找在量子相变附近出现的新型电子有序物质态是凝聚态物理学的一个有趣的前沿领域。在钌酸盐中，4d电子态之间的库仑相关性与其自旋轨道相互作用之间的相互作用导致了复杂形式的电子现象。在这里，我们研究双层 Sr3(Ru1−xMnx)2O7 及其掺杂诱导的从金属到反铁磁莫特绝缘体的量子相变。使用扫描隧道显微镜的光谱成像，我们可视化真实空间和动量空间中电子态的演化。我们发现费米能级上存在一个部分能隙，该能隙随着掺杂而形成，形成弱莫特绝缘态。在量子相变附近，我们发现空间电子重组为相应的棋盘电荷顺序。这些发现与铜酸盐赝能隙相中的普遍电荷顺序相似，并证明了掺杂莫特绝缘体中普遍存在的电荷顺序。
Search for novel electronically ordered states of matter emerging near quantum phase transitions is an intriguing frontier of condensed matter physics. In ruthenates, the interplay between Coulomb correlations among the 4delectronic states and their spin-orbit interactions, lead to complex forms of electronic phenomena. Here we investigate the double layered Sr3(Ru1−xMnx)2O7and its doping-induced quantum phase transition from a metal to an antiferromagnetic Mott insulator. Using spectroscopic imaging with the scanning tunneling microscope, we visualize the evolution of the electronic states in real- and momentum-space. We find a partial-gap at the Fermi energy that develops with doping to form a weak Mott insulating state. Near the quantum phase transition, we discover a spatial electronic reorganization into a commensurate checkerboard charge order. These findings bear a resemblance to the universal charge order in the pseudogap phase of cuprates and demonstrate the ubiquity of charge order that emanates from doped Mott insulators.