Bulk band structure of RuO2 measured with soft x-ray angle-resolved photoemission spectroscopy

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review B Pub Date : 2025-05-01 DOI:10.1103/physrevb.111.134450

Zihan Lin, Dong Chen, Wenlong Lu, Xin Liang, Shiyu Feng, Kohei Yamagami, Jacek Osiecki, Mats Leandersson, Balasubramanian Thiagarajan, Junwei Liu, Claudia Felser, Junzhang Ma

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引用次数: 0

Abstract

Altermagnetism exhibits unique physical properties such as spin-momentum locking, anomalous Hall effect, nontrivial topological phase, and giant magnetoresistance. Among all the predicted candidates, several room-temperature altermagnets are suggested to host significant potential applications. RuO2 has been proposed as the most promising candidate. However, recently, there is intense debate about whether RuO2 exhibits magnetic order or not. Experiments by several different technologies claim the collinear magnetic order and spin-splitting-induced effects. However, very recent muon spin resonance (μSR) results reveal no magnetic order in RuO2, which indicates that the time-reversal symmetry is not broken. Direct observation of the high-resolution bulk band structure is absent to date but essential to investigate the electronic structure of RuO2. In this study, utilizing soft x-ray angle-resolved photoemission spectroscopy, we report systematic direct experimental observation of bulk band structure of RuO2.

Published by the American Physical Society

2025

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软x射线角分辨光谱学测量的氧化钌体带结构

电磁学具有独特的物理性质，如自旋动量锁定、反常霍尔效应、非平凡拓扑相和巨磁阻。在所有预测的候选材料中，几种室温交替磁体被认为具有重要的潜在应用价值。RuO2被认为是最有希望的候选者。然而，近年来，关于RuO2是否具有磁有序的争论非常激烈。通过几种不同技术的实验，证实了共线磁序和自旋分裂诱导效应。然而，最近的μ子自旋共振（μSR）结果显示，RuO2中没有磁序，这表明时间反转对称性没有被打破。高分辨率体带结构的直接观测是迄今为止缺乏的，但对于研究RuO2的电子结构至关重要。在本研究中，我们利用软x射线角度分辨光发射光谱，系统地直接实验观察了RuO2的体带结构。2025年由美国物理学会出版

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来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter