铱铂碲中的电荷条纹序与超导性

Charge-Stripe Order and Superconductivity in IrPtTe.

作者信息

Ivashko O, Yang L, Destraz D, Martino E, Chen Y, Guo C Y, Yuan H Q, Pisoni A, Matus P, Pyon S, Kudo K, Nohara M, Forró L, Rønnow H M, Hücker M, V Zimmermann M, Chang J

机构信息

Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057, Zürich, Switzerland.

Laboratory of Physics of Complex Matter, Institute of Physics, Ecole Polytechnique Féderale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland.

出版信息

Sci Rep. 2017 Dec 7;7(1):17157. doi: 10.1038/s41598-017-16945-7.

DOI:10.1038/s41598-017-16945-7

PMID:29214992

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5719350/

Abstract

A combined resistivity and hard x-ray diffraction study of superconductivity and charge ordering in Ir IrPtTe, as a function of Pt substitution and externally applied hydrostatic pressure, is presented. Experiments are focused on samples near the critical composition x ~ 0.045 where competition and switching between charge order and superconductivity is established. We show that charge order as a function of pressure in IrPtTe is preempted - and hence triggered - by a structural transition. Charge ordering appears uniaxially along the short crystallographic (1, 0, 1) domain axis with a (1/5, 0, 1/5) modulation. Based on these results we draw a charge-order phase diagram and discuss the relation between stripe ordering and superconductivity.

摘要

本文展示了一项关于IrIrPtTe中超导性和电荷有序性的联合电阻率与硬X射线衍射研究，该研究是作为Pt替代和外部施加静水压力的函数。实验聚焦于临界成分x≈0.045附近的样品，在该成分处电荷有序和超导性之间的竞争与转变得以确立。我们表明，IrPtTe中电荷有序作为压力的函数是由结构转变预先决定并因此被触发的。电荷有序沿着短晶轴(1, 0, 1)单轴出现，具有(1/5, 0, 1/5)调制。基于这些结果，我们绘制了电荷有序相图，并讨论了条纹有序与超导性之间的关系。