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

被引：2

作者：

Kunwar, Shankar ^{[1
]}

机构：

[1] King Fahd Univ Petr & Minerals, Dept Phys, Dhahran 31261, Saudi Arabia

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2014年 / 27卷 / 11期

关键词：

High-T-c superconductor; Electron-doped superconductor; Pseudogap; NORMAL-STATE; NMR EVIDENCE; GAP; DEPENDENCE; EVOLUTION; DENSITY; MODEL; PROBE;

D O I：

10.1007/s10948-014-2622-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the scanning tunnelling spectroscopy (STS) studies of the energy gap (Delta) at the Fermi surface of electron-doped high-temperature (high-T-c) cuprate superconductor Pr0(88LaCe0(12CuO4-delta, 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 2 Delta)KBTc higher than 7, which puts electron-doped cuprates in strong coupling regime.

引用

页码：2461 / 2466

页数：6

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