title: Chemical ordering suppresses large-scale electronic phase separation in doped manganites.
abstract: For strongly correlated oxides, it has been a long-standing issue regarding the role of the chemical ordering of the dopants on the physical properties. Here, using unit cell by unit cell superlattice growth technique, we determine the role of chemical ordering of the Pr dopant in a colossal magnetoresistant (La(1-y)Pr(y))(1-x)Ca(x)MnO3 (LPCMO) system, which has been well known for its large length-scale electronic phase separation phenomena. Our experimental results show that the chemical ordering of Pr leads to marked reduction of the length scale of electronic phase separations. Moreover, compared with the conventional Pr-disordered LPCMO system, the Pr-ordered LPCMO system has a metal-insulator transition that is ∼100 K higher because the ferromagnetic metallic phase is more dominant at all temperatures below the Curie temperature.
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Yinyan
authors.identifier: http://orcid.org/0000-0002-8943-3624
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Kai
authors.identifier: http://orcid.org/0000-0002-4112-0995
authors.initials: K
authors.lastname: Du
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.|Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100080, China.
authors.forename: Jiebin
authors.initials: J
authors.lastname: Niu
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Lingfang
authors.initials: L
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Wengang
authors.initials: W
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Hanxuan
authors.initials: H
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Shanghai Synchrotron Radiation Facility (SSRF), Shanghai 201204, China.
authors.forename: Tieying
authors.initials: T
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Yunfang
authors.initials: Y
authors.lastname: Kou
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Shao
authors.affiliation: Shanghai Synchrotron Radiation Facility (SSRF), Shanghai 201204, China.
authors.forename: Xingyu
authors.initials: X
authors.lastname: Gao
authors.affiliation: Department of Physics and Astronom, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
authors.forename: Xiaoshan
authors.initials: X
authors.lastname: Xu
authors.affiliation: Department of Physics, Nanjing University, Nanjing 211189, China.
authors.forename: Xiaoshan
authors.identifier: http://orcid.org/0000-0003-4200-3587
authors.initials: X
authors.lastname: Wu
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Dong
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China.
authors.forename: Lifeng
authors.initials: L
authors.lastname: Yin
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Shen