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Shao TN, Zhang ZT, Qiao YJ, Zhao Q, Liu HW, Chen XX, Jiang WM, Yao CL, Chen XY, Chen MH, Dou RF, Xiong CM, Zhang GM, Yang YF, Nie JC. Kondo scattering in underdoped Nd 1-xSr xNiO 2 infinite-layer superconducting thin films. Natl Sci Rev 2023; 10:nwad112. [PMID: 37818115 PMCID: PMC10561711 DOI: 10.1093/nsr/nwad112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/25/2022] [Accepted: 03/13/2023] [Indexed: 10/12/2023] Open
Abstract
The recent discovery of superconductivity in infinite-layer nickelates generates tremendous research endeavors, but the ground state of their parent compounds is still under debate. Here, we report experimental evidence for the dominant role of Kondo scattering in the underdoped Nd1-xSrxNiO2 thin films. A resistivity minimum associated with logarithmic temperature dependence in both longitudinal and Hall resistivities are observed in the underdoped Nd1-xSrxNiO2 samples before the superconducting transition. At lower temperatures down to 0.04 K, the resistivities become saturated, following the prediction of the Kondo model. A linear scaling behavior [Formula: see text] between anomalous Hall conductivity [Formula: see text] and conductivity [Formula: see text]is revealed, verifying the dominant Kondo scattering at low temperature. The effect of weak (anti-)localization is found to be secondary. Our experiments can help in clarifying the basic physics in the underdoped Nd1-xSrxNiO2 infinite-layer thin films.
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Affiliation(s)
- Ting-Na Shao
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Zi-Tao Zhang
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Yu-Jie Qiao
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Qiang Zhao
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Hai-Wen Liu
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Xin-Xiang Chen
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Wei-Min Jiang
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Chun-Li Yao
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Xing-Yu Chen
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Mei-Hui Chen
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Rui-Fen Dou
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Chang-Min Xiong
- Department of Physics, Beijing Normal University, Beijing100875, China
| | - Guang-Ming Zhang
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing100084, China
- Frontier Science Center for Quantum Information, Beijing100084, China
| | - Yi-Feng Yang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing100190, China
- Songshan Lake Materials Laboratory, Dongguan523808, China
| | - Jia-Cai Nie
- Department of Physics, Beijing Normal University, Beijing100875, China
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2
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Koikegami S. Pseudogap formation due to charge-transfer transition and Kondo effect. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:185602. [PMID: 36848682 DOI: 10.1088/1361-648x/acbf95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
We investigate the doping evolution of the electronic state of the three-bandt-J-Umodel considering the normal state of the hole-doped high-Tcsuperconducting cuprate. In our model, when some number of holes are doped into the undoped state, thedelectron exhibits the charge-transfer (CT)-type Mott-Hubbard transition along with a chemical potential jump. A reduced CT gap is formed from thepband and the coherent component of thedband, and it shrinks due to charge fluctuations as more holes are doped as in the pseudogap (PG) phenomenon. This trend is reinforced as thed-pband hybridization is increased, and a Fermi liquid state is retrieved as in the Kondo effect. These suggest that the PG in the hole-doped cuprate emerges due to the CT transition and the Kondo effect.
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Zeng S, Tang CS, Yin X, Li C, Li M, Huang Z, Hu J, Liu W, Omar GJ, Jani H, Lim ZS, Han K, Wan D, Yang P, Pennycook SJ, Wee ATS, Ariando A. Phase Diagram and Superconducting Dome of Infinite-Layer Nd_{1-x}Sr_{x}NiO_{2} Thin Films. PHYSICAL REVIEW LETTERS 2020; 125:147003. [PMID: 33064530 DOI: 10.1103/physrevlett.125.147003] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 09/08/2020] [Indexed: 06/11/2023]
Abstract
Infinite-layer Nd_{1-x}Sr_{x}NiO_{2} thin films with Sr doping level x from 0.08 to 0.3 are synthesized and investigated. We find a superconducting dome x between 0.12 and 0.235 accompanied by a weakly insulating behavior in both under- and overdoped regimes. The dome is akin to that in the electron-doped 214-type and infinite-layer cuprate superconductors. For x≥0.18, the normal state Hall coefficient (R_{H}) changes the sign from negative to positive as the temperature decreases. The temperature of the sign changes decreases monotonically with decreasing x from the overdoped side and approaches the superconducting dome at the midpoint, suggesting a reconstruction of the Fermi surface with the dopant concentration across the dome.
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Affiliation(s)
- Shengwei Zeng
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
| | - Chi Sin Tang
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, Singapore 117603, Singapore
| | - Xinmao Yin
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, Singapore 117603, Singapore
| | - Changjian Li
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Mengsha Li
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Zhen Huang
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
| | - Junxiong Hu
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
| | - Wei Liu
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
| | - Ganesh Ji Omar
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
| | - Hariom Jani
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
| | - Zhi Shiuh Lim
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
| | - Kun Han
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
| | - Dongyang Wan
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
| | - Ping Yang
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, Singapore 117603, Singapore
| | - Stephen John Pennycook
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Andrew T S Wee
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
- Singapore Synchrotron Light Source (SSLS), National University of Singapore, Singapore 117603, Singapore
- Centre for Advanced 2D Materials and Graphene Research, National University of Singapore, Singapore 117546, Singapore
| | - Ariando Ariando
- Department of Physics, Faculty of Science, National University of Singapore, Singapore 117551, Singapore
- NUSNNI-NanoCore, National University of Singapore, Singapore 117411, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
- Centre for Advanced 2D Materials and Graphene Research, National University of Singapore, Singapore 117546, Singapore
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4
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Komori S, Di Bernardo A, Buzdin AI, Blamire MG, Robinson JWA. Magnetic Exchange Fields and Domain Wall Superconductivity at an All-Oxide Superconductor-Ferromagnet Insulator Interface. PHYSICAL REVIEW LETTERS 2018; 121:077003. [PMID: 30169105 DOI: 10.1103/physrevlett.121.077003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/20/2018] [Indexed: 06/08/2023]
Abstract
At a superconductor-ferromagnet (S/F) interface, the F layer can introduce a magnetic exchange field within the S layer, which acts to locally spin split the superconducting density of states. The effect of magnetic exchange fields on superconductivity has been thoroughly explored at S-ferromagnet insulator (S/FI) interfaces for isotropic s-wave S and a thickness that is smaller than the superconducting coherence length. Here we report a magnetic exchange field effect at an all-oxide S/FI interface involving the anisotropic d-wave high temperature superconductor praseodymium cerium copper oxide (PCCO) and the FI praseodymium calcium manganese oxide (PCMO). The magnetic exchange field in PCCO, detected via magnetotransport measurements through the superconducting transition, is localized to the PCCO/PCMO interface with an average magnitude that depends on the presence or absence of magnetic domain walls in PCMO. The results are promising for the development of all-oxide superconducting spintronic devices involving unconventional pairing and high temperature superconductors.
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Affiliation(s)
- S Komori
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - A Di Bernardo
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - A I Buzdin
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
- University Bordeaux, LOMA UMR-CNRS 5798, F-33405 Talence Cedex, France
| | - M G Blamire
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - J W A Robinson
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
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Postolova SV, Mironov AY, Baklanov MR, Vinokur VM, Baturina TI. Reentrant Resistive Behavior and Dimensional Crossover in Disordered Superconducting TiN Films. Sci Rep 2017; 7:1718. [PMID: 28496099 PMCID: PMC5431868 DOI: 10.1038/s41598-017-01753-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 04/04/2017] [Indexed: 11/18/2022] Open
Abstract
A reentrant temperature dependence of the normal state resistance often referred to as the N-shaped temperature dependence, is omnipresent in disordered superconductors - ranging from high-temperature cuprates to ultrathin superconducting films - that experience superconductor-to-insulator transition. Yet, despite the ubiquity of this phenomenon its origin still remains a subject of debate. Here we investigate strongly disordered superconducting TiN films and demonstrate universality of the reentrant behavior. We offer a quantitative description of the N-shaped resistance curve. We show that upon cooling down the resistance first decreases linearly with temperature and then passes through the minimum that marks the 3D-2D crossover in the system. In the 2D temperature range the resistance first grows with decreasing temperature due to quantum contributions and eventually drops to zero as the system falls into a superconducting state. Our findings demonstrate the prime importance of disorder in dimensional crossover effects.
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Affiliation(s)
- Svetlana V Postolova
- A. V. Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk, 630090, Russia
- Department of Physics, Novosibirsk State University, Novosibirsk, 630090, Russia
| | - Alexey Yu Mironov
- A. V. Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk, 630090, Russia
- Department of Physics, Novosibirsk State University, Novosibirsk, 630090, Russia
| | | | - Valerii M Vinokur
- Argonne National Laboratory, Materials Science Division, Lemont, IL, 60439, USA.
| | - Tatyana I Baturina
- A. V. Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk, 630090, Russia
- Department of Physics, Novosibirsk State University, Novosibirsk, 630090, Russia
- Departamento de Fisica de la MateriaCondensada, Instituto de Ciencia de Materiales Nicolas Cabrera and Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, Madrid, E-28049, Spain
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6
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Nonequilibrium fluctuations as a distinctive feature of weak localization. Sci Rep 2015; 5:10705. [PMID: 26024506 PMCID: PMC4448654 DOI: 10.1038/srep10705] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/22/2015] [Indexed: 11/24/2022] Open
Abstract
Two-dimensional materials, such as graphene, topological insulators, and
two-dimensional electron gases, represent a technological playground to develop
coherent electronics. In these systems, quantum interference effects, and in
particular weak localization, are likely to occur. These coherence effects are
usually characterized by well-defined features in dc electrical transport, such as a
resistivity increase and negative magnetoresistance below a crossover temperature.
Recently, it has been shown that in magnetic and superconducting compounds,
undergoing a weak-localization transition, a specific low-frequency 1/f noise
occurs. An interpretation in terms of nonequilibrium universal conductance
fluctuations has been given. The universality of this unusual electric noise
mechanism has been here verified by detailed voltage-spectral density investigations
on ultrathin copper films. The reported experimental results validate the proposed
theoretical framework, and also provide an alternative methodology to detect
weak-localization effects by using electric noise spectroscopy.
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7
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Tarantini C, Putti M, Gurevich A, Shen Y, Singh RK, Rowell JM, Newman N, Larbalestier DC, Cheng P, Jia Y, Wen HH. Suppression of the critical temperature of superconducting NdFeAs(OF) single crystals by Kondo-like defect sites induced by alpha-particle irradiation. PHYSICAL REVIEW LETTERS 2010; 104:087002. [PMID: 20366959 DOI: 10.1103/physrevlett.104.087002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Indexed: 05/29/2023]
Abstract
We report the effect of alpha-particle irradiation on the reduction of the critical temperature T{c} of a NdFeAs(OF) single crystal. Our data indicate that irradiation defects cause both nonmagnetic and magnetic scattering, resulting in the Kondo-like excess resistance Delta rho(T) proportional to lnT over 2 decades in temperatures above T{c}. The critical density of magnetic irradiation defects which suppresses T{c} is found to be much higher than those for cuprates and multiband BCS superconductors. We suggest that such anomalously weak pair breaking by irradiation defects indicates that magnetic scattering in pnictides is coupled with pairing interactions mediated by spin fluctuations.
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Affiliation(s)
- C Tarantini
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
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Enayati-Rad A, Narduzzo A, Rullier-Albenque F, Horii S, Hussey NE. Irradiation-induced confinement in a quasi-one-dimensional metal. PHYSICAL REVIEW LETTERS 2007; 99:136402. [PMID: 17930615 DOI: 10.1103/physrevlett.99.136402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2006] [Indexed: 05/25/2023]
Abstract
The anisotropic resistivity of PrBa(2)Cu(4)O(8) has been measured as a function of electron irradiation fluence. Localization effects are observed for extremely small amounts of disorder corresponding to electron mean free paths of order 100 unit cells. Estimates of the localization corrections suggest that this anomalous localization threshold heralds a crossover to a ground state with pronounced one-dimensional character in which conduction electrons become confined to a small cluster of chains.
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Affiliation(s)
- A Enayati-Rad
- H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, BS8 1TL, United Kingdom
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Rullier-Albenque F, Alloul H, Proust C, Lejay P, Forget A, Colson D. Total suppression of superconductivity by high magnetic fields in YBa(2)Cu(3)O(6.6). PHYSICAL REVIEW LETTERS 2007; 99:027003. [PMID: 17678247 DOI: 10.1103/physrevlett.99.027003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2006] [Indexed: 05/16/2023]
Abstract
We have studied the variation of transverse magnetoresistance of underdoped YBCO(6.6) crystals, either pure or with reduced T(c) down to 3.5 K by electron irradiation, in fields up to 60 T. We find evidence that the superconducting fluctuation contribution to the conductivity is suppressed only above a threshold field H(c)'(T), which is found to vanish at T(c)' > T(c). In the pure YBCO(6.6) sample, H(c)' is already 50 T at T(c). We find that increasing disorder weakly depresses H(c)'(0), T(c)', and T(nu), the onset of the Nernst signal. Thus, these energy scales appear more characteristic of the 2D local pairing than the pseudogap temperature which is not modified by disorder.
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Rullier-Albenque F, Tourbot R, Alloul H, Lejay P, Colson D, Forget A. Nernst effect and disorder in the normal state of high-T(c) cuprates. PHYSICAL REVIEW LETTERS 2006; 96:067002. [PMID: 16606033 DOI: 10.1103/physrevlett.96.067002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Indexed: 05/08/2023]
Abstract
We have studied the influence of disorder induced by electron irradiation on the Nernst effect in optimally and underdoped YBa2Cu3O(7-delta) single crystals. The fluctuation regime above T(c) expands significantly with disorder, indicating that the T(c) decrease is partly due to the induced loss of phase coherence. In pure crystals the temperature extension of the Nernst signal is found to be narrow whatever the hole doping, contrary to data reported in the low-T(c) cuprate families. Our results show that the presence of intrinsic disorder can explain the enhanced range of the Nernst signal found in the pseudogap phase of the latter compounds.
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Rullier-Albenque F, Alloul H, Tourbot R. Influence of pair breaking and phase fluctuations on disordered high Tc cuprate superconductors. PHYSICAL REVIEW LETTERS 2003; 91:047001. [PMID: 12906689 DOI: 10.1103/physrevlett.91.047001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2003] [Indexed: 05/24/2023]
Abstract
Electron irradiation has been used to introduce point defects in a controlled way in underdoped and optimally doped YBa(2)Cu(3)O(7-delta) crystals. This technique allows us to perform very accurate measurements of T(c) and of the ab plane resistivity in a wide range of defect contents x(d) down to T(c)=0. The variation of T(c) and of the transition width with x(d) do not follow current predictions of pair-breaking theories. The data are rather compatible, at least for the highly damaged regime, with the expected influence of phase fluctuations. These results open new questions about the evolution of the defect induced T(c) depression over the phase diagram of the cuprates.
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