Anomalous longitudinal nuclear spin relaxation in TlBa2(Ca,Y) Cu2O7 at the non-superconducting phase boundary

Yuuji Kunii; Takao Suzuki; Takayuki Goto; Satoru Nakajima

doi:10.1016/j.jmmm.2003.12.321

Anomalous longitudinal nuclear spin relaxation in TlBa₂(Ca,Y) Cu₂O₇ at the non-superconducting phase boundary

Yuuji Kunii, Takao Suzuki, Takayuki Goto, Satoru Nakajima

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

1 Citation (Scopus)

Abstract

Tl-based high-T_C cuprate TlBa₂Ca_1-xY _xCu₂O₇ (Tl1212) shows an anomalous electronic phase diagram, in which the non-superconducting phase persists on hole doping until x = 0.6 where T_C abruptly jumps to 96 K. Around the critical hole concentration, Tl nuclear relaxation curves follow a so-called stretched-exponential function, suggesting that the doped holes are localized in small islands. This microscopic inhomogeneity in hole distribution is considered to be the origin of anomalous suppression of the superconductivity in the lightly doped region.

Original language	English
Pages (from-to)	e1521-e1522
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.321
Publication status	Published - 2004 May
Externally published	Yes

Keywords

NMR
Tl-based high-T cuprate

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2003.12.321

Cite this

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title = "Anomalous longitudinal nuclear spin relaxation in TlBa2(Ca,Y) Cu2O7 at the non-superconducting phase boundary",

abstract = "Tl-based high-TC cuprate TlBa2Ca1-xY xCu2O7 (Tl1212) shows an anomalous electronic phase diagram, in which the non-superconducting phase persists on hole doping until x = 0.6 where TC abruptly jumps to 96 K. Around the critical hole concentration, Tl nuclear relaxation curves follow a so-called stretched-exponential function, suggesting that the doped holes are localized in small islands. This microscopic inhomogeneity in hole distribution is considered to be the origin of anomalous suppression of the superconductivity in the lightly doped region.",

keywords = "NMR, Tl-based high-T cuprate",

author = "Yuuji Kunii and Takao Suzuki and Takayuki Goto and Satoru Nakajima",

note = "Funding Information: A part of experiments has been done at High-Field Laboratory, Institute of Material Research, Tohoku University. This research was partially supported by the Toray Science Foundation, and by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid.",

year = "2004",

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doi = "10.1016/j.jmmm.2003.12.321",

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journal = "Journal of Magnetism and Magnetic Materials",

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T1 - Anomalous longitudinal nuclear spin relaxation in TlBa2(Ca,Y) Cu2O7 at the non-superconducting phase boundary

AU - Kunii, Yuuji

AU - Suzuki, Takao

AU - Goto, Takayuki

AU - Nakajima, Satoru

N1 - Funding Information: A part of experiments has been done at High-Field Laboratory, Institute of Material Research, Tohoku University. This research was partially supported by the Toray Science Foundation, and by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid.

PY - 2004/5

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N2 - Tl-based high-TC cuprate TlBa2Ca1-xY xCu2O7 (Tl1212) shows an anomalous electronic phase diagram, in which the non-superconducting phase persists on hole doping until x = 0.6 where TC abruptly jumps to 96 K. Around the critical hole concentration, Tl nuclear relaxation curves follow a so-called stretched-exponential function, suggesting that the doped holes are localized in small islands. This microscopic inhomogeneity in hole distribution is considered to be the origin of anomalous suppression of the superconductivity in the lightly doped region.

AB - Tl-based high-TC cuprate TlBa2Ca1-xY xCu2O7 (Tl1212) shows an anomalous electronic phase diagram, in which the non-superconducting phase persists on hole doping until x = 0.6 where TC abruptly jumps to 96 K. Around the critical hole concentration, Tl nuclear relaxation curves follow a so-called stretched-exponential function, suggesting that the doped holes are localized in small islands. This microscopic inhomogeneity in hole distribution is considered to be the origin of anomalous suppression of the superconductivity in the lightly doped region.

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