Identification of a nematic pair density wave state in Bi(2)Sr(2)CaCu(2)O(8+x).
Identification of a nematic pair density wave state in Bi(2)Sr(2)CaCu(2)O(8+x).
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Bi（2）Sr（2）CaCu（2）O（8+x）中向列相对密度波态的识别。
DOI：
10.1073/pnas.2206481119
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发表时间：
2022-08-02
影响因子：
11.1
通讯作者：
中科院分区：
文献类型：
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虽然有令人信服的证据表明，一对密度波（PDW）状态发生在空穴掺杂的CuO 2材料，其微观现象和机制仍然是一个谜。一个流行的理论概念是，在这些材料中的二维强相关电子可以自发地产生一个单向的，晶格相称（条纹）PDW状态，不诱导任何预先存在的电荷密度波顺序。在这里，在几乎没有电荷密度波现象的样品中，我们通过直接扫描的约瑟夫森隧道显微镜可视化的调制电子对密度，PDW状态在Bi 2Sr 2CaCu 2 O 8 +x是一个残留相，与杂质原子钉扎伊辛域的强烈单向和相称的对密度调制。电子对密度波（PDW）态是铜氧化物关联超导领域的研究热点。PDWs表现出周期性调制的电子配对，可以直接使用扫描约瑟夫森隧道显微镜（SJTM）可视化。尽管从理论上讲，d波超导（DSC）和PDW序参数的交织允许出现过多的全局电子对序，但实际上在各种铜氧化物中发生的是未知的。在这里，我们使用SJTM可视化的PDW和DSC状态的相互作用在Bi 2Sr 2CaCu 2 O 8 +x在载流子密度的电荷密度波调制几乎不存在。同时可视化它们的振幅揭示了交织的PDW和DSC是相互吸引的状态。然后，通过分别成像的两个正交PDW的电子对密度调制，我们发现了一个强大的双光子PDW状态。它的空间排列需要伊辛域相反的向列性，每个主要由单向和晶格相称的电子对密度调制。此外，我们表明，通过直接成像的散射共振识别Zn杂质原子的网站主要发生在这些域之间的边界内。这意味着ZnPDW状态被Zn原子钉扎，如最近提出的[Lozano等人，物理修订版B 103，L020502（2021）]。综合考虑，这些数据表明Bi 2Sr 2CaCu 2 O 8 +x中的PDW是残留的双电子对密度波状态[Agterberg et al. Phys. Rev. B 91，054502（2015）; Wardh和Granath arXiv：2203.08250]。
Although compelling evidence now exists that a pair density wave (PDW) state occurs in hole-doped CuO2 materials, its microscopic phenomenology and mechanism remain a mystery. A prevalent theoretical concept has been that the two-dimensional strongly correlated electrons in these materials can spontaneously generate a unidirectional, lattice-commensurate (striped) PDW state that is not induced by any preexistent charge density wave order. Here, in samples with virtually no charge density wave phenomenology, we show by direct scanned Josephson tunneling microscopy visualization of the modulating electron pair density that the PDW state in Bi2Sr2CaCu2O8+x is a vestigial nematic phase, with impurity-atom pinned Ising domains of strongly unidirectional and commensurate pair density modulations. Electron-pair density wave (PDW) states are now an intense focus of research in the field of cuprate correlated superconductivity. PDWs exhibit periodically modulating superconductive electron pairing that can be visualized directly using scanned Josephson tunneling microscopy (SJTM). Although from theory, intertwining the d-wave superconducting (DSC) and PDW order parameters allows a plethora of global electron-pair orders to appear, which one actually occurs in the various cuprates is unknown. Here, we use SJTM to visualize the interplay of PDW and DSC states in Bi2Sr2CaCu2O8+x at a carrier density where the charge density wave modulations are virtually nonexistent. Simultaneous visualization of their amplitudes reveals that the intertwined PDW and DSC are mutually attractive states. Then, by separately imaging the electron-pair density modulations of the two orthogonal PDWs, we discover a robust nematic PDW state. Its spatial arrangement entails Ising domains of opposite nematicity, each consisting primarily of unidirectional and lattice commensurate electron-pair density modulations. Further, we demonstrate by direct imaging that the scattering resonances identifying Zn impurity atom sites occur predominantly within boundaries between these domains. This implies that the nematic PDW state is pinned by Zn atoms, as was recently proposed [Lozano et al., Phys. Rev. B 103, L020502 (2021)]. Taken in combination, these data indicate that the PDW in Bi2Sr2CaCu2O8+x is a vestigial nematic pair density wave state [Agterberg et al. Phys. Rev. B 91, 054502 (2015); Wardh and Granath arXiv:2203.08250].
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DOI：
10.1073/pnas.1406019111
发表时间：
2014-06-03
影响因子：
11.1
作者：
Nie, Laimei;Tarjus, Gilles;Kivelson, Steven Allan
通讯作者：
Kivelson, Steven Allan
影响因子：
8.6
作者：
Himeda, A;Kato, T;Ogata, M
通讯作者：
Ogata, M
影响因子：
56.9
作者：
Fujita, K.;Kim, Chung Koo;Davis, J. C.
通讯作者：
Davis, J. C.
影响因子：
19.6
作者：
Agterberg, D. F.;Tsunetsugu, H.
通讯作者：
Tsunetsugu, H.
影响因子：
56.9
作者：
Liu, Xiaolong;Chong, Yi Xue;Davis, J. C. Seamus
通讯作者：
Davis, J. C. Seamus