Two Distinct Charge Orders in Infinite-Layer PrNiO_(2+δ) Revealed by Resonant X-Ray Diffraction  

作　　者：Xiaolin Ren Ronny Sutarto Qiang Gao Qisi Wang Jiarui Li Yao Wang Tao Xiang Jiangping Hu J.Chang Riccardo Comin X.J.Zhou Zhihai Zhu 任晓琳;Ronny Sutarto;高强;王奇思;李佳睿;王耀;向涛;胡江平;J.Chang;Riccardo Comin;周兴江;朱志海(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Canadian Light Source,Saskatoon,Saskatchewan S7N 2V3,Canada;Physik-Institut,Universität Zürich,Winterthurerstrasse 190,CH-8057 Zürich,Switzerland;Department of Physics,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,USA;Department of Physics and Astronomy,Clemson University,Clemson,SC 29631,USA;Beijing Academy of Quantum Information Sciences,Beijing 100193,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Canadian Light Source,Saskatoon,Saskatchewan S7N 2V3,Canada [4]Physik-Institut,Universität Zürich,Winterthurerstrasse 190,CH-8057 Zürich,Switzerland [5]Department of Physics,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,USA [6]Department of Physics and Astronomy,Clemson University,Clemson,SC 29631,USA [7]Beijing Academy of Quantum Information Sciences,Beijing 100193,China [8]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics Letters》2024年第11期154-169,共16页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.12074411);the National Key Research and Development Program of China(Grant Nos.2022YFA1403900 and 2021YFA1401800);the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB25000000);the Swiss National Science Foundation(Grant No.200021_188564)。

摘　　要：Research of infinite-layer nickelates has unveiled a broken translation symmetry,which has sparked significant interest in its root,its relationship to superconductivity,and its comparison to charge order in cuprates.In this study,resonant x-ray scattering measurements were performed on thin films of infinite-layer PrNiO_(2+δ).The results show significant differences in the superlattice reflection at the Ni L_(3) absorption edge compared to that at the Pr M_(5) resonance in their dependence on energy,temperature,and local symmetry.These differences point to two distinct charge orders,although they share the same in-plane wavevectors.It is suggested that these dissimilarities could be linked to the excess oxygen dopants,given that the resonant reflections were observed in an incompletely reduced PrNiO_(2+δ)film.Furthermore,azimuthal analysis indicates that the oxygen ligands likely play a crucial role in the charge modulation revealed at the Ni L_(3) resonance.

关 键 词：film RESONANT CHARGE 

分 类 号：O511.3[一般工业技术—材料科学与工程]