Existence of Pseudogap at the Transition Temperature of an Electron-Doped Copper–Oxide Superconductor

Shankar Kunwar

doi:10.1007/s10948-014-2622-0

Existence of Pseudogap at the Transition Temperature of an Electron-Doped Copper–Oxide Superconductor

Shankar Kunwar^*

^*Corresponding author for this work

Department of Physics

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

3 Scopus citations

Abstract

We present the scanning tunnelling spectroscopy (STS) studies of the energy gap (Δ) at the Fermi surface of electron-doped high-temperature (high-T_c) cuprate superconductor Pr_0.88LaCe_0.12CuO_4−δ, which is commonly known as PLCCO. We found that the energy gap does not vanish at the transition temperature (T_c). Moreover, it was observed that gap-like features are present at some locations of the sample at temperatures above T_c. The energy gap with magnitude is found consistent with d-wave symmetry. We also found the value of the ratio 2Δ/K_BT_c higher than 7, which puts electron-doped cuprates in strong coupling regime.

Original language	English
Pages (from-to)	2461-2466
Number of pages	6
Journal	Journal of Superconductivity and Novel Magnetism
Volume	27
Issue number	11
DOIs	https://doi.org/10.1007/s10948-014-2622-0
State	Published - 19 Oct 2014

Bibliographical note

Publisher Copyright:
© 2014, Springer Science+Business Media New York.

Keywords

Electron-doped superconductor
High-T superconductor
Pseudogap

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1007/s10948-014-2622-0

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title = "Existence of Pseudogap at the Transition Temperature of an Electron-Doped Copper–Oxide Superconductor",

abstract = "We present the scanning tunnelling spectroscopy (STS) studies of the energy gap (Δ) at the Fermi surface of electron-doped high-temperature (high-Tc) cuprate superconductor Pr0.88LaCe0.12CuO4−δ, which is commonly known as PLCCO. We found that the energy gap does not vanish at the transition temperature (Tc). Moreover, it was observed that gap-like features are present at some locations of the sample at temperatures above Tc. The energy gap with magnitude is found consistent with d-wave symmetry. We also found the value of the ratio 2Δ/KBTc higher than 7, which puts electron-doped cuprates in strong coupling regime.",

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T1 - Existence of Pseudogap at the Transition Temperature of an Electron-Doped Copper–Oxide Superconductor

AU - Kunwar, Shankar

PY - 2014/10/19

Y1 - 2014/10/19

N2 - We present the scanning tunnelling spectroscopy (STS) studies of the energy gap (Δ) at the Fermi surface of electron-doped high-temperature (high-Tc) cuprate superconductor Pr0.88LaCe0.12CuO4−δ, which is commonly known as PLCCO. We found that the energy gap does not vanish at the transition temperature (Tc). Moreover, it was observed that gap-like features are present at some locations of the sample at temperatures above Tc. The energy gap with magnitude is found consistent with d-wave symmetry. We also found the value of the ratio 2Δ/KBTc higher than 7, which puts electron-doped cuprates in strong coupling regime.

AB - We present the scanning tunnelling spectroscopy (STS) studies of the energy gap (Δ) at the Fermi surface of electron-doped high-temperature (high-Tc) cuprate superconductor Pr0.88LaCe0.12CuO4−δ, which is commonly known as PLCCO. We found that the energy gap does not vanish at the transition temperature (Tc). Moreover, it was observed that gap-like features are present at some locations of the sample at temperatures above Tc. The energy gap with magnitude is found consistent with d-wave symmetry. We also found the value of the ratio 2Δ/KBTc higher than 7, which puts electron-doped cuprates in strong coupling regime.

KW - Electron-doped superconductor

KW - High-T superconductor

KW - Pseudogap

UR - https://www.scopus.com/pages/publications/84911998848

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DO - 10.1007/s10948-014-2622-0

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SN - 1557-1939

VL - 27

SP - 2461

EP - 2466

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 11

ER -

Existence of Pseudogap at the Transition Temperature of an Electron-Doped Copper–Oxide Superconductor

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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