Scholarlink

<p>It is widely believed that cuprates (i) must be strong-coupling superconductors, (ii) their superconducting phase curve is governed by phase fluctuations, and (iii) exhibit a loss of superfluid density with increasing overdoping, hand-in-hand with the fall in <i>T</i><sub>c</sub>. Here we examine these issues for several canonical cuprates in the light of their electronic specific heat. We find evidence for near-weak-coupling behaviour where the mean-field <i>T</i><sub>c</sub> is governed by the gap amplitude, and fluctuations in both amplitude and phase serve only to partially diminish <i>T</i><sub>c</sub> from this mean-field value. We also find that, over the doping range considered, the superfluid density is not depleted with overdoping. As such, this work questions several prevailing paradigms in cuprate physics [1].</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Entropic Weight in Cuprates: Is the Superfluid Depleted with Overdoping?

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月12日

查看全文
  • Jeffery L. Tallon

摘要

It is widely believed that cuprates (i) must be strong-coupling superconductors, (ii) their superconducting phase curve is governed by phase fluctuations, and (iii) exhibit a loss of superfluid density with increasing overdoping, hand-in-hand with the fall in Tc. Here we examine these issues for several canonical cuprates in the light of their electronic specific heat. We find evidence for near-weak-coupling behaviour where the mean-field Tc is governed by the gap amplitude, and fluctuations in both amplitude and phase serve only to partially diminish Tc from this mean-field value. We also find that, over the doping range considered, the superfluid density is not depleted with overdoping. As such, this work questions several prevailing paradigms in cuprate physics [1].