Electronic nature of the pseudogap in electron-doped Sr2IrO4
Electronic nature of the pseudogap in electron-doped Sr2IrO4
复制标题
电子掺杂 Sr2IrO4 中赝能隙的电子性质
DOI：
10.1038/s41535-022-00467-1
复制
发表时间：
2022
影响因子：
5.7
通讯作者：
Wu, Tao
中科院分区：
文献类型：
--
作者：
Peng, Shuting;Lane, Christopher;Hu, Yong;Guo, Mingyao;Chen, Xiang;Sun, Zeliang;Hashimoto, Makoto;Lu, Donghui;Shen, Zhi-Xun;Wu, Tao
在高温(TC)铜酸盐超导体中，许多奇异现象都起源于神秘的伪隙状态，这种状态被解释为由预先形成的库珀对或竞争有序或它们的组合组成。在电子掺杂的Sr2IrO4--铜酸盐的5d电子对应物--中观察到的赝隙现象，激发了人们对作为探索铜酸盐奇异物理的试验台的浓厚兴趣。在这里，我们用角分辨光电子能谱(ARPES)和并行理论模型研究了电子掺杂的Sr2IrO4的赝隙态。我们的分析表明，在没有破坏粒子-空穴对称性或引起光谱展宽的情况下，Sr2IrO4的赝隙态出现，这是铜酸盐中相互竞争的有序的特征。我们发现，在Sr2IrO4的赝能带态中，准粒子色散及其与温度的关系指向零散射波矢和有限关联长度的电子有序。讨论了粒子-空穴对称的预制库珀对作为这种电子有序的一种可行机制。文中还讨论了无公度密度波的潜在作用。
In high-temperature (Tc) cuprate superconductors, many exotic phenomena are rooted in the enigmatic pseudogap state, which has been interpreted as consisting of preformed Cooper pairs or competing orders or a combination thereof. Observation of pseudogap phenomenologically in electron-doped Sr2IrO4—the 5d electron counterpart of the cuprates, has spurred intense interest in the strontium iridates as a testbed for exploring the exotic physics of the cuprates. Here, we examine the pseudogap state of electron-doped Sr2IrO4by angle-resolved photoemission spectroscopy (ARPES) and parallel theoretical modeling. Our analysis demonstrates that the pseudogap state of Sr2IrO4appears without breaking the particle–hole symmetry or inducing spectral broadening which are telltale signatures of competing orders in the cuprates. We find quasiparticle dispersion and its temperature dependence in the pseudogap state of Sr2IrO4to point to an electronic order with a zero scattering wave vector and limited correlation length. Particle–hole symmetric preformed Cooper pairs are discussed as a viable mechanism for such an electronic order. The potential roles of incommensurate density waves are also discussed.
影响因子：
19.6
作者：
Battisti, I.;Bastiaans, K. M.;Allan, M. P.
通讯作者：
Allan, M. P.
影响因子：
16.6
作者：
Chen X;Schmehr JL;Islam Z;Porter Z;Zoghlin E;Finkelstein K;Ruff JPC;Wilson SD
通讯作者：
Wilson SD