4.8 Article

Observation of In-Plane Quantum Griffiths Singularity in Two-Dimensional Crystalline Superconductors

期刊

PHYSICAL REVIEW LETTERS
卷 127, 期 13, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.137001

关键词

-

资金

  1. National Key Research and Development Program of China [2018YFA0305604, 2017YFA 0303300, 2017YFA0304600]
  2. National Natural Science Foundation of China [11888101, 11774008, 12174442, 11974430, 12022407]
  3. Beijing Natural Science Foundation [Z180010]
  4. Strategic Priority Research Program of Chinese Academy of Sciences [XDB28000000]
  5. China Postdoctoral Science Foundation [2019M650290, 2020T130021]

向作者/读者索取更多资源

The study found that Quantum Griffiths singularity (QGS) exists in ultrathin PdTe2 films, with QGS observed under both perpendicular and parallel magnetic fields in four-monolayer films. However, as the film thickness increases to six monolayers, QGS disappears under perpendicular field but persists under parallel field, suggesting differences in microscopic processes may be the cause of this discrepancy. This work demonstrates the universality of parallel field induced QGS and calls for further investigation on quantum phase transitions under parallel magnetic fields.
Quantum Griffiths singularity (QGS) reveals the profound influence of quenched disorder on the quantum phase transitions, characterized by the divergence of the dynamical critical exponent at the boundary of the vortex glasslike phase, named as quantum Griffiths phase. However, in the absence of vortices, whether the QGS can exist under a parallel magnetic field remains a puzzle. Here, we study the magnetic field induced superconductor-metal transition in ultrathin crystalline PdTe2 films grown by molecular beam epitaxy. Remarkably, the QGS emerges under both perpendicular and parallel magnetic field in four-monolayer PdTe2 films. The direct activated scaling analysis with a new irrelevant correction has been proposed, providing important evidence of QGS. With increasing film thickness to six monolayers, the QGS disappears under perpendicular field but persists under parallel field, and this discordance may originate from the differences in microscopic processes. Our work demonstrates the universality of parallel field induced QGS and can stimulate further investigations on novel quantum phase transitions under parallel magnetic field.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据