ARPES study on many-body interactions in high-Tc cuprates: Origin of kink in energy dispersion

Takashi Takahashi

doi:10.1016/j.jpcs.2005.10.101

ARPES study on many-body interactions in high-T_c cuprates: Origin of kink in energy dispersion

Takashi Takahashi

Advanced Institute for Materials Research (AIMR)

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

1 Citation (Scopus)

Abstract

We report a systematic high-resolution ARPES study on Bi₂Sr ₂Ca_n-1Cu_nO_2n+4 (n=1-3). We found two different 'kinks' in the energy dispersion near E_F located at around (π/2, π/2) and (π, 0), respectively. The latter shows a strong temperature and momentum dependence in accordance with the superconductivity while the former shows a less temperature dependence and survives even above T_c. Impurity doping of about 1% drastically weakens the kink near (π, 0) while the kink around (π/2, π/2) is not influenced. The present experimental results indicate that the kink around (π, 0) originates in the coupling of electrons with Q=(π, π) magnetic mode and plays an essential role in the superconductivity while that around (π/2, π/2) has a different origin.

Original language	English
Pages (from-to)	193-197
Number of pages	5
Journal	Journal of Physics and Chemistry of Solids
Volume	67
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jpcs.2005.10.101
Publication status	Published - 2006 Jan

Keywords

C. Photoelectron spectroscopy

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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@article{2bdcb461bd164b8eb0c39feeccdc80c1,

title = "ARPES study on many-body interactions in high-Tc cuprates: Origin of kink in energy dispersion",

abstract = "We report a systematic high-resolution ARPES study on Bi2Sr 2Can-1CunO2n+4 (n=1-3). We found two different 'kinks' in the energy dispersion near EF located at around (π/2, π/2) and (π, 0), respectively. The latter shows a strong temperature and momentum dependence in accordance with the superconductivity while the former shows a less temperature dependence and survives even above Tc. Impurity doping of about 1% drastically weakens the kink near (π, 0) while the kink around (π/2, π/2) is not influenced. The present experimental results indicate that the kink around (π, 0) originates in the coupling of electrons with Q=(π, π) magnetic mode and plays an essential role in the superconductivity while that around (π/2, π/2) has a different origin.",

keywords = "C. Photoelectron spectroscopy",

author = "Takashi Takahashi",

note = "Funding Information: This work was collaborated by T. Sato, H. Matsui, K. Terashima, H. Ding, H.-B. Yang, S.-C. Wang, T. Fujii, T. Watanabe, A. Matsuda, T. Terashima, and K. Kadowaki. and is supported by grants from MEXT of Japan and US NSF DMR-0072205. The Synchrotron Radiation Center is supported by US NSF DMR-0084402. ",

year = "2006",

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doi = "10.1016/j.jpcs.2005.10.101",

language = "English",

volume = "67",

pages = "193--197",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Limited",

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PY - 2006/1

Y1 - 2006/1

N2 - We report a systematic high-resolution ARPES study on Bi2Sr 2Can-1CunO2n+4 (n=1-3). We found two different 'kinks' in the energy dispersion near EF located at around (π/2, π/2) and (π, 0), respectively. The latter shows a strong temperature and momentum dependence in accordance with the superconductivity while the former shows a less temperature dependence and survives even above Tc. Impurity doping of about 1% drastically weakens the kink near (π, 0) while the kink around (π/2, π/2) is not influenced. The present experimental results indicate that the kink around (π, 0) originates in the coupling of electrons with Q=(π, π) magnetic mode and plays an essential role in the superconductivity while that around (π/2, π/2) has a different origin.

AB - We report a systematic high-resolution ARPES study on Bi2Sr 2Can-1CunO2n+4 (n=1-3). We found two different 'kinks' in the energy dispersion near EF located at around (π/2, π/2) and (π, 0), respectively. The latter shows a strong temperature and momentum dependence in accordance with the superconductivity while the former shows a less temperature dependence and survives even above Tc. Impurity doping of about 1% drastically weakens the kink near (π, 0) while the kink around (π/2, π/2) is not influenced. The present experimental results indicate that the kink around (π, 0) originates in the coupling of electrons with Q=(π, π) magnetic mode and plays an essential role in the superconductivity while that around (π/2, π/2) has a different origin.

KW - C. Photoelectron spectroscopy

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