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Combined spectroscopic imaging STM and ARPES study of different gaps measured in the cuprate phase diagram

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Title
Combined spectroscopic imaging STM and ARPES study of different gaps measured in the cuprate phase diagram
Author(s)
Fujita, K; Drozdov, I; Du, Z; Li, H; S.-H. Joo; J. Lee; Gu, G; Johnson, PD; Valla, T
Publication Date
2020-01
Journal
PHYSICAL REVIEW B, v.101, no.4, pp.045136
Publisher
AMER PHYSICAL SOC
Abstract
A comparative study of the gaps measured in two techniques, angle-resolved photoelectron spectroscopy and spectroscopic imaging scanning tunneling microscopy, is presented. In particular the study focuses on the more overdoped region of the cuprate phase diagram in the superconducting state. While the total densities of states measured in the two techniques agree very well, it is shown that the peak in the density of states, Delta(DOS), is consistently displaced to higher energies relative to the maximal superconducting gap, Delta(0), determined in photoemission. The difference between the two gaps is more evident for the less doped samples reflecting increased normalization of bands. This observation will clearly influence the boundaries in the phase diagrams of the cuprates defined by these two techniques. ©2020 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/7024
DOI
10.1103/PhysRevB.101.045136
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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