Choubey, P and Joo, SH and Fujita, KS and Du, Z and Edkins, SD and Hamidian, MH and Eisaki, H and Uchida, S and Mackenzie, AP and Lee, J and Davis, JCS and Hirschfeld, PJ (2020) Atomic-scale electronic structure of the cuprate pair density wave state coexisting with superconductivity. In: Proceedings of the National Academy of Sciences of the United States of America, 117 (26). pp. 14805-14811.
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Abstract
The defining characteristic of hole-doped cuprates is d-wave high temperature superconductivity. However, intense theoretical interest is now focused on whether a pair density wave state (PDW) could coexist with cuprate superconductivity D. F. Agterberg et al., Annu. Rev. Condens. Matter Phys. 11, 231 (2020). Here, we use a strong-coupling mean-field theory of cuprates, to model the atomic-scale electronic structure of an eight-unit-cell periodic, d-symmetry form factor, pair density wave (PDW) state coexisting with d-wave superconductivity (DSC). From this PDW + DSC model, the atomically resolved density of Bogoliubov quasiparticle states Formula: see text is predicted at the terminal BiO surface of Bi2Sr2CaCu2O8 and compared with high-precision electronic visualization experiments using spectroscopic imaging scanning tunneling microscopy (STM). The PDW + DSC model predictions include the intraunit-cell structure and periodic modulations of Formula: see text, the modulations of the coherence peak energy Formula: see text and the characteristics of Bogoliubov quasiparticle interference in scattering-wavevector space Formula: see text Consistency between all these predictions and the corresponding experiments indicates that lightly hole-doped Bi2Sr2CaCu2O8 does contain a PDW + DSC state. Moreover, in the model the PDW + DSC state becomes unstable to a pure DSC state at a critical hole density p*, with empirically equivalent phenomena occurring in the experiments. All these results are consistent with a picture in which the cuprate translational symmetry-breaking state is a PDW, the observed charge modulations are its consequence, the antinodal pseudogap is that of the PDW state, and the cuprate critical point at p* � 19% occurs due to disappearance of this PDW. Copyright © 2020 the Author(s). Published by PNAS.
| Item Type: | Journal Article |
|---|---|
| Publication: | Proceedings of the National Academy of Sciences of the United States of America |
| Publisher: | NLM (Medline) |
| Additional Information: | The copyright of this article belongs to NLM (Medline) |
| Keywords: | article; prediction; scanning tunneling microscopy; superconductivity; theoretical study |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 24 Aug 2020 05:42 |
| Last Modified: | 24 Aug 2020 05:42 |
| URI: | http://eprints.iisc.ac.in/id/eprint/66046 |
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