Continuous doping of a cuprate surface: Insights from in situ angle-resolved photoemission

Y. G. Zhong; J. Y. Guan; X. Shi; J. Zhao; Z. C. Rao; C. Y. Tang; H. J. Liu; Z. Y. Weng; Z. Q. Wang; G. D. Gu; T. Qian; Y. J. Sun; H. Ding

doi:10.1103/PhysRevB.98.140507

Continuous doping of a cuprate surface: Insights from in situ angle-resolved photoemission

Y. G. Zhong, J. Y. Guan, X. Shi, J. Zhao, Z. C. Rao, C. Y. Tang, H. J. Liu, Z. Y. Weng, Z. Q. Wang, G. D. Gu, T. Qian, Y. J. Sun^*, H. Ding

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

We report a technique of a continuously doped surface of Bi2Sr2CaCu2O8+x through ozone/vacuum annealing and a systematic measurement over the nearly whole superconducting dome on the same sample surface by in situ angle-resolved photoemission spectroscopy. We find that the quasiparticle weight on the antinode is proportional to the doped carrier concentration x within the entire superconducting dome, while the nodal quasiparticle weight changes more mildly. More significantly, we discover that a d-wave pairing energy gap extracted from the nodal region scales well with the onset temperature of the Nernst signal. These findings suggest that the emergence of superconducting pairing is concomitant with the onset of free vortices.

Original language	English
Article number	140507
Journal	Physical Review B
Volume	98
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.98.140507
Publication status	Published - 24 Oct 2018
Externally published	Yes

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title = "Continuous doping of a cuprate surface: Insights from in situ angle-resolved photoemission",

abstract = "We report a technique of a continuously doped surface of Bi2Sr2CaCu2O8+x through ozone/vacuum annealing and a systematic measurement over the nearly whole superconducting dome on the same sample surface by in situ angle-resolved photoemission spectroscopy. We find that the quasiparticle weight on the antinode is proportional to the doped carrier concentration x within the entire superconducting dome, while the nodal quasiparticle weight changes more mildly. More significantly, we discover that a d-wave pairing energy gap extracted from the nodal region scales well with the onset temperature of the Nernst signal. These findings suggest that the emergence of superconducting pairing is concomitant with the onset of free vortices.",

author = "Zhong, {Y. G.} and Guan, {J. Y.} and X. Shi and J. Zhao and Rao, {Z. C.} and Tang, {C. Y.} and Liu, {H. J.} and Weng, {Z. Y.} and Wang, {Z. Q.} and Gu, {G. D.} and T. Qian and Sun, {Y. J.} and H. Ding",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = oct,

day = "24",

doi = "10.1103/PhysRevB.98.140507",

language = "English",

volume = "98",

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TY - JOUR

T1 - Continuous doping of a cuprate surface

T2 - Insights from in situ angle-resolved photoemission

AU - Zhong, Y. G.

AU - Guan, J. Y.

AU - Shi, X.

AU - Zhao, J.

AU - Rao, Z. C.

AU - Tang, C. Y.

AU - Liu, H. J.

AU - Weng, Z. Y.

AU - Wang, Z. Q.

AU - Gu, G. D.

AU - Qian, T.

AU - Sun, Y. J.

AU - Ding, H.

PY - 2018/10/24

Y1 - 2018/10/24

N2 - We report a technique of a continuously doped surface of Bi2Sr2CaCu2O8+x through ozone/vacuum annealing and a systematic measurement over the nearly whole superconducting dome on the same sample surface by in situ angle-resolved photoemission spectroscopy. We find that the quasiparticle weight on the antinode is proportional to the doped carrier concentration x within the entire superconducting dome, while the nodal quasiparticle weight changes more mildly. More significantly, we discover that a d-wave pairing energy gap extracted from the nodal region scales well with the onset temperature of the Nernst signal. These findings suggest that the emergence of superconducting pairing is concomitant with the onset of free vortices.

AB - We report a technique of a continuously doped surface of Bi2Sr2CaCu2O8+x through ozone/vacuum annealing and a systematic measurement over the nearly whole superconducting dome on the same sample surface by in situ angle-resolved photoemission spectroscopy. We find that the quasiparticle weight on the antinode is proportional to the doped carrier concentration x within the entire superconducting dome, while the nodal quasiparticle weight changes more mildly. More significantly, we discover that a d-wave pairing energy gap extracted from the nodal region scales well with the onset temperature of the Nernst signal. These findings suggest that the emergence of superconducting pairing is concomitant with the onset of free vortices.

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U2 - 10.1103/PhysRevB.98.140507

DO - 10.1103/PhysRevB.98.140507

M3 - Article

AN - SCOPUS:85055678304

SN - 2469-9950

VL - 98

JO - Physical Review B

JF - Physical Review B

IS - 14

M1 - 140507

ER -

Continuous doping of a cuprate surface: Insights from in situ angle-resolved photoemission

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