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Kurokawa K, Isono S, Kohama Y, Kunisada S, Sakai S, Sekine R, Okubo M, Watson MD, Kim TK, Cacho C, Shin S, Tohyama T, Tokiwa K, Kondo T. Unveiling phase diagram of the lightly doped high-T c cuprate superconductors with disorder removed. Nat Commun 2023; 14:4064. [PMID: 37452014 PMCID: PMC10349131 DOI: 10.1038/s41467-023-39457-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 06/08/2023] [Indexed: 07/18/2023] Open
Abstract
The currently established electronic phase diagram of cuprates is based on a study of single- and double-layered compounds. These CuO2 planes, however, are directly contacted with dopant layers, thus inevitably disordered with an inhomogeneous electronic state. Here, we solve this issue by investigating a 6-layered Ba2Ca5Cu6O12(F,O)2 with inner CuO2 layers, which are clean with the extremely low disorder, by angle-resolved photoemission spectroscopy (ARPES) and quantum oscillation measurements. We find a tiny Fermi pocket with a doping level less than 1% to exhibit well-defined quasiparticle peaks which surprisingly lack the polaronic feature. This provides the first evidence that the slightest amount of carriers is enough to turn a Mott insulating state into a metallic state with long-lived quasiparticles. By tuning hole carriers, we also find an unexpected phase transition from the superconducting to metallic states at 4%. Our results are distinct from the nodal liquid state with polaronic features proposed as an anomaly of the heavily underdoped cuprates.
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Affiliation(s)
- Kifu Kurokawa
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - Shunsuke Isono
- Department of Applied Electronics, Tokyo University of Science, Tokyo, 125-8585, Japan
| | | | - So Kunisada
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - Shiro Sakai
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - Ryotaro Sekine
- Department of Applied Electronics, Tokyo University of Science, Tokyo, 125-8585, Japan
| | - Makoto Okubo
- Department of Applied Electronics, Tokyo University of Science, Tokyo, 125-8585, Japan
| | - Matthew D Watson
- Diamond Light Source, Harwell Campus, Didcot, OX11 0DE, United Kingdom
| | - Timur K Kim
- Diamond Light Source, Harwell Campus, Didcot, OX11 0DE, United Kingdom
| | - Cephise Cacho
- Diamond Light Source, Harwell Campus, Didcot, OX11 0DE, United Kingdom
| | - Shik Shin
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
- Office of University Professor, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - Takami Tohyama
- Department of Applied Physics, Tokyo University of Science, Tokyo, 125-8585, Japan
| | - Kazuyasu Tokiwa
- Department of Applied Electronics, Tokyo University of Science, Tokyo, 125-8585, Japan.
| | - Takeshi Kondo
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
- Trans-scale Quantum Science Institute, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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Huang Y, Zhang L, Zhou X, Liao L, Jin F, Han X, Dong T, Xu S, Zhao L, Dai Y, Cheng Q, Huang X, Zhang Q, Wang L, Wang NL, Yue M, Bai X, Li Y, Wu Q, Gao HJ, Gu G, Wang Y, Zhou XJ. Unveiling the Degradation Mechanism of High-Temperature Superconductor Bi 2Sr 2CaCu 2O 8+δ in Water-Bearing Environments. ACS APPLIED MATERIALS & INTERFACES 2022; 14:39489-39496. [PMID: 35976742 DOI: 10.1021/acsami.2c08997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The physical properties of copper oxide high-temperature superconductors have been studied extensively, such as the band structure and doping effects of Bi2Sr2CaCu2O8+δ (Bi-2212). However, some chemical-related properties of these superconductors are rarely reported, such as their stability in water-bearing environments. Herein, we report experiments combined with ab initio calculations that address the effects of water in contact with Bi-2212. The evolution of Bi-2212 flakes with exposure to water for different time intervals was tested and characterized by optical microscopy (OM), atomic force microscopy (AFM), Raman spectroscopy, transmission electron microscopy (TEM), and electrical measurements. The thickness of Bi-2212 flakes is gradually decreased in water, and some thin flakes can be completely etched away after a few days. The stability of Bi-2212 in other solvents is also evaluated, including alcohol, acetone, HCl, and KOH. The morphology of Bi-2212 flakes is relatively stable in organic solvents. However, the flakes are etched relatively quick in HCl and KOH, especially in an acidic environment. Our results imply that hydrogen ions are primarily responsible for the deterioration of their properties. Both TEM and calculation results demonstrate that the atoms in the Bi-O plane are relatively stable when compared to the inner atoms in Sr-O, Ca-O, and Cu-O planes. This work contributes toward understanding the chemical stability of a Bi-2212 superconducting device in environmental medium, which is important for both fundamental studies and practical applications of copper oxide high-temperature superconductors.
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Affiliation(s)
- Yuan Huang
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lei Zhang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
| | - Xiaocheng Zhou
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Lei Liao
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Feng Jin
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xu Han
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
| | - Tao Dong
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Shuxiang Xu
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Lin Zhao
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yunyun Dai
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
| | - Qiuzhen Cheng
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xinyu Huang
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
| | - Qingming Zhang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lifen Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Nan-Lin Wang
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Ming Yue
- Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
| | - Xuedong Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yafei Li
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Qiong Wu
- Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
| | - Hong-Jun Gao
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Genda Gu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Yeliang Wang
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
- MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China
| | - Xing-Jiang Zhou
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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4
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Drozdov IK, Pletikosić I, Kim CK, Fujita K, Gu GD, Davis JCS, Johnson PD, Božović I, Valla T. Phase diagram of Bi 2Sr 2CaCu 2O 8+δ revisited. Nat Commun 2018; 9:5210. [PMID: 30523265 PMCID: PMC6283832 DOI: 10.1038/s41467-018-07686-w] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/12/2018] [Indexed: 11/09/2022] Open
Abstract
In cuprate superconductors, the doping of carriers into the parent Mott insulator induces superconductivity and various other phases whose characteristic temperatures are typically plotted versus the doping level p. In most materials, p cannot be determined from the chemical composition, but it is derived from the superconducting transition temperature, Tc, using the assumption that the Tc dependence on doping is universal. Here, we present angle-resolved photoemission studies of Bi2Sr2CaCu2O8+δ, cleaved and annealed in vacuum or in ozone to reduce or increase the doping from the initial value corresponding to Tc = 91 K. We show that p can be determined from the underlying Fermi surfaces and that in-situ annealing allows mapping of a wide doping regime, covering the superconducting dome and the non-superconducting phase on the overdoped side. Our results show a surprisingly smooth dependence of the inferred Fermi surface with doping. In the highly overdoped regime, the superconducting gap approaches the value of 2Δ0 = (4 ± 1)kBTc.
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Affiliation(s)
- I K Drozdov
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
| | - I Pletikosić
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
- Department of Physics, Princeton University, Princeton, NJ, 08544, USA
| | - C-K Kim
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
| | - K Fujita
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
| | - G D Gu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
| | - J C Séamus Davis
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY, 14853, USA
| | - P D Johnson
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
| | - I Božović
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA
| | - T Valla
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY, 11973, USA.
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