{"title":"Signatures of the attractive interaction in spin spectra of one-dimensional cuprate chains","authors":"Zecheng Shen, Jiarui Liu, Hao-Xin Wang, Yao Wang","doi":"10.1103/physrevresearch.6.l032068","DOIUrl":null,"url":null,"abstract":"Identifying the minimal model for cuprates is crucial for explaining the high-<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>T</mi><mi>c</mi></msub></math> pairing mechanism. Recent photoemission experiments have suggested a significant near-neighbor attractive interaction <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>V</mi></math> in cuprate chains, favoring pairing instability. To determine its strength, we systematically investigate the dynamical spin structure factors <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>S</mi><mo>(</mo><mi>q</mi><mo>,</mo><mi>ω</mi><mo>)</mo></mrow></math> using the density matrix renormalization group. Our analysis quantitatively reveals a notable softening in the two-spinon continuum, particularly evident in the intense spectrum at large momentum. This softening is primarily driven by the renormalization of the superexchange interaction, as determined by a comparison with the slave-boson theory. We also demonstrate the feasibility of detecting this spectral shift in thin-film samples using resonant inelastic x-ray scattering. Therefore, this provides a distinctive fingerprint for the attractive interaction, motivating future experiments to unveil essential ingredients in cuprates.","PeriodicalId":20546,"journal":{"name":"Physical Review Research","volume":"1 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1103/physrevresearch.6.l032068","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Identifying the minimal model for cuprates is crucial for explaining the high- pairing mechanism. Recent photoemission experiments have suggested a significant near-neighbor attractive interaction in cuprate chains, favoring pairing instability. To determine its strength, we systematically investigate the dynamical spin structure factors using the density matrix renormalization group. Our analysis quantitatively reveals a notable softening in the two-spinon continuum, particularly evident in the intense spectrum at large momentum. This softening is primarily driven by the renormalization of the superexchange interaction, as determined by a comparison with the slave-boson theory. We also demonstrate the feasibility of detecting this spectral shift in thin-film samples using resonant inelastic x-ray scattering. Therefore, this provides a distinctive fingerprint for the attractive interaction, motivating future experiments to unveil essential ingredients in cuprates.
确定铜氧化物的最小模型对于解释高锝配对机制至关重要。最近的光辐射实验表明,在铜氧化物链中存在显著的近邻吸引力相互作用 V,这有利于配对的不稳定性。为了确定其强度,我们利用密度矩阵重正化群系统地研究了动态自旋结构因子 S(q,ω)。我们的定量分析揭示了双自旋子连续体的显著软化,尤其是在大动量下的强谱中更为明显。这种软化主要是由超交换相互作用的重正化驱动的,这是由与从玻色子理论的比较确定的。我们还证明了利用共振非弹性 X 射线散射在薄膜样品中探测这种光谱偏移的可行性。因此,这为有吸引力的相互作用提供了一个独特的指纹,促使未来的实验揭示铜氧化物的基本成分。