Pseudogap behavior revealed in interlayer tunneling in overdoped Bi2Sr2CaCu2O8+x
SCIE
SCOPUS
- Title
- Pseudogap behavior revealed in interlayer tunneling in overdoped Bi2Sr2CaCu2O8+x
- Authors
- Bae, MH; Park, JH; Choi, JH; Lee, HJ; Park, KS
- Date Issued
- 2008-03
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We report on heating-compensated interlayer tunneling spectroscopy (ITS) performed on stacks of overdoped Bi2Sr2CaCu2O8+x intrinsic junctions, where most of the bias-induced heating in the ITS was eliminated. The onset temperature of a pseudogap (PG), which was revealed in the hump structure of the electronic excitation spectra, nearly reached room temperature for our overdoped intrinsic junctions, which represented the genuine PG onset. At a temperature below but close to T-c, both the superconducting coherence peak and the pseudogap hump coexisted, implying that the two gaps are of separate origins. The hump voltage increased below T-c, following the superconducting gap voltage, which led to the conclusion that the hump structure below T-c in our ITS arose from the combined contributions of the quasiparticle spectral weights of two different characters: one of the superconducting state and another of the PG state near the antinodal region.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12192
- DOI
- 10.1103/PhysRevB.77.094519
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 77, no. 9, page. 94519 - 94519, 2008-03
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