Temperature dependence of tunneling conductance on an overdoped Pr 0.82LaCe0.18CuO4 with Tc∼16K

M. Minematsu; M. Fujita; K. Yamada; N. Miyakawa

doi:10.1016/j.physc.2009.12.011

Temperature dependence of tunneling conductance on an overdoped Pr _0.82LaCe_0.18CuO₄ with T_c∼16K

M. Minematsu, M. Fujita, K. Yamada, N. Miyakawa

Materials Property Division

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

Abstract

We present tunneling conductances on electron-doped Pr _0.82LaCe_0.18CuO₄ (PLCCO) single crystals with T_c∼16K that are in overdoped regime. Our data exhibit reproducible superconducting-gap peaks at 4.44±0.71mV and the subgap-shape is cusplike which can be fitted well by using d-wave or nonmonotonic d-wave symmetry, showing that PLCCO is a superconductor with nodal gap. Furthermore, we found that the temperature dependence of the gap magnitude is BCS like and it disappeared at T_c. We conclude that these characteristic features (such as d-wave order parameter and no pseudogap above T_c) of electron-doped cuprates in the overdoped regime are fundamentally similar to those of hole-doped cuprates in the overdoped regime.

Original language	English
Pages (from-to)	S29-S30
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.12.011
Publication status	Published - 2010 Dec

Keywords

Electron-doped cuprates
PrLaCeCuO
Tunneling spectroscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Temperature dependence of tunneling conductance on an overdoped Pr 0.82LaCe0.18CuO4 with Tc∼16K",

abstract = "We present tunneling conductances on electron-doped Pr 0.82LaCe0.18CuO4 (PLCCO) single crystals with Tc∼16K that are in overdoped regime. Our data exhibit reproducible superconducting-gap peaks at 4.44±0.71mV and the subgap-shape is cusplike which can be fitted well by using d-wave or nonmonotonic d-wave symmetry, showing that PLCCO is a superconductor with nodal gap. Furthermore, we found that the temperature dependence of the gap magnitude is BCS like and it disappeared at Tc. We conclude that these characteristic features (such as d-wave order parameter and no pseudogap above Tc) of electron-doped cuprates in the overdoped regime are fundamentally similar to those of hole-doped cuprates in the overdoped regime.",

keywords = "Electron-doped cuprates, PrLaCeCuO, Tunneling spectroscopy",

author = "M. Minematsu and M. Fujita and K. Yamada and N. Miyakawa",

note = "Funding Information: The authors would like to thank K. Ogata and S. Kawashima for their assistance with the experiments. This work was supported by Grants-in-Aid for Scientific Research (C) (N.M.), for Young Scientists A (M.F.), and for Creative Scientific Research (K.Y.), from the Ministry of Education, Culture, Sports, Science and Technology, Japan.",

year = "2010",

month = dec,

doi = "10.1016/j.physc.2009.12.011",

language = "English",

volume = "470",

pages = "S29--S30",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

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number = "SUPPL.1",

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TY - JOUR

T1 - Temperature dependence of tunneling conductance on an overdoped Pr 0.82LaCe0.18CuO4 with Tc∼16K

AU - Minematsu, M.

AU - Fujita, M.

AU - Yamada, K.

AU - Miyakawa, N.

N1 - Funding Information: The authors would like to thank K. Ogata and S. Kawashima for their assistance with the experiments. This work was supported by Grants-in-Aid for Scientific Research (C) (N.M.), for Young Scientists A (M.F.), and for Creative Scientific Research (K.Y.), from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

PY - 2010/12

Y1 - 2010/12

N2 - We present tunneling conductances on electron-doped Pr 0.82LaCe0.18CuO4 (PLCCO) single crystals with Tc∼16K that are in overdoped regime. Our data exhibit reproducible superconducting-gap peaks at 4.44±0.71mV and the subgap-shape is cusplike which can be fitted well by using d-wave or nonmonotonic d-wave symmetry, showing that PLCCO is a superconductor with nodal gap. Furthermore, we found that the temperature dependence of the gap magnitude is BCS like and it disappeared at Tc. We conclude that these characteristic features (such as d-wave order parameter and no pseudogap above Tc) of electron-doped cuprates in the overdoped regime are fundamentally similar to those of hole-doped cuprates in the overdoped regime.

AB - We present tunneling conductances on electron-doped Pr 0.82LaCe0.18CuO4 (PLCCO) single crystals with Tc∼16K that are in overdoped regime. Our data exhibit reproducible superconducting-gap peaks at 4.44±0.71mV and the subgap-shape is cusplike which can be fitted well by using d-wave or nonmonotonic d-wave symmetry, showing that PLCCO is a superconductor with nodal gap. Furthermore, we found that the temperature dependence of the gap magnitude is BCS like and it disappeared at Tc. We conclude that these characteristic features (such as d-wave order parameter and no pseudogap above Tc) of electron-doped cuprates in the overdoped regime are fundamentally similar to those of hole-doped cuprates in the overdoped regime.

KW - Electron-doped cuprates

KW - PrLaCeCuO

KW - Tunneling spectroscopy

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