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DOI	10.1073/PNAS.2018336117
	Nonadiabatic coupling of the dynamical structure to the superconductivity in YSr2Cu2.75Mo0.25O7.54 and Sr2CuO3.3
	Conradson S.D.; Geballe T.H.; Jin C.-Q.; Cao L.-P.; Gauzzi A.; Karppinen M.; Baldinozzi G.; Li W.-M.; Gilioli E.; Jiang J.M.; Latimer M.; Mueller O.; Nasretdinova V.
发表日期	2021
ISSN	00278424
起始页码	33099
结束页码	33106
卷号	117 期号:52
英文摘要	A crucial issue in cuprates is the extent and mechanism of the coupling of the lattice to the electrons and the superconductivity. Here we report Cu K edge extended X-ray absorption fine structure measurements elucidating the internal quantum tunneling polaron (iqtp) component of the dynamical structure in two heavily overdoped superconducting cuprate compounds, tetragonal YSr2Cu2.75-Mo0.25O7.54 with superconducting critical temperature, Tc = 84 K and hole density p = 0.3 to 0.5 per planar Cu, and the tetragonal phase of Sr2CuO3.3 with Tc = 95 K and p = 0.6. In YSr2Cu2.75Mo0.25O7.54 changes in the Cu-apical O two-site distribution reflect a sequential renormalization of the double-well potential of this site beginning at Tc, with the energy difference between the two minima increasing by ∼6 meV between Tc and 52 K. Sr2CuO3.3 undergoes a radically larger transformation at Tc, >1-Å displacements of the apical O atoms. The principal feature of the dynamical structure underlying these transformations is the strongly anharmonic oscillation of the apical O atoms in a double-well potential that results in the observation of two distinct O sites whose Cu–O distances indicate different bonding modes and valence-charge distributions. The coupling of the superconductivity to the iqtp that originates in this nonadiabatic coupling between the electrons and lattice demonstrates an important role for the dynamical structure whereby pairing occurs even in a system where displacements of the atoms that are part of the transition are sufficiently large to alter the Fermi surface. The synchronization and dynamic coherence of the iqtps resulting from the strong interactions within a crystal would be expected to influence this process. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Cuprates; Dynamical structure; Superconductivity; Tunneling polarons; X-ray absorption fine structure
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179623
作者单位	Department of Complex Matter, Jozef Stefan Institute, Ljubljana, 1000, Slovenia; Department of Chemistry, Washington State University, Pullman, WA 99164, United States; Department of Applied Physics, Stanford University, Stanford, CA 94305, United States; Institute of Physics, Chinese Academy of Sciences, Beijing, 100864, China; School of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, China; IMPMC, Sorbonne Université and CNRS, Paris, 75005, France; Department of Chemistry and Materials Science, Aalto University, Aalto, FI-00076, Finland; Structures, Properties and Modeling of Solids Laboratory, CNRS CentraleSupélec, Université Paris-Saclay, Gif-sur-Yvette, F-91192, France; Institute of Materials for Electronics and Magnetism, Consiglio Nazionale delle Ricerche, Parma, A-43124, Italy; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States; Stanford Synchrotron Radiation Lightsourc...
推荐引用方式 GB/T 7714	Conradson S.D.,Geballe T.H.,Jin C.-Q.,et al. Nonadiabatic coupling of the dynamical structure to the superconductivity in YSr2Cu2.75Mo0.25O7.54 and Sr2CuO3.3[J],2021,117(52).
APA	Conradson S.D..,Geballe T.H..,Jin C.-Q..,Cao L.-P..,Gauzzi A..,...&Nasretdinova V..(2021).Nonadiabatic coupling of the dynamical structure to the superconductivity in YSr2Cu2.75Mo0.25O7.54 and Sr2CuO3.3.Proceedings of the National Academy of Sciences of the United States of America,117(52).
MLA	Conradson S.D.,et al."Nonadiabatic coupling of the dynamical structure to the superconductivity in YSr2Cu2.75Mo0.25O7.54 and Sr2CuO3.3".Proceedings of the National Academy of Sciences of the United States of America 117.52(2021).