Unconventional two-dimensional quantum oscillations in three-dimensional thick SrRuO3 films

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2024-09-11 DOI:10.1063/5.0230365

Yuta Matsuki, Shinichi Nishihaya, Markus Kriener, Ren Oshima, Fumiya Miwa, Masaki Uchida

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Abstract

SrRuO3 is a prototypical transition metal oxide that hosts rich physical properties, including itinerant ferromagnetism, high conductivity, and intrinsic Hall effect originating in the Weyl points. Recently, high-quality SrRuO3 films with residual resistivity ratios of more than 50 have been reported to exhibit quantum oscillations at low temperatures in spite of their strong electron correlation. While the origin of the oscillations has been discussed in relation to Weyl orbits based on the Weyl semimetal band structure, so far experimentally reported results are consistent neither with each other nor with theoretically expected behavior, leaving the origin of the oscillations in SrRuO3 films still elusive. In this report, we have carefully evaluated the quantum oscillations observed in three-dimensional thick SrRuO3 films with a high residual resistivity ratio of RRR = 82. We reveal the coexistence of two oscillation components both derived from two-dimensional electronic states and with slightly different masses, suggesting the involvement of surface Fermi arc states formed between different Weyl point pairs.

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三维厚 SrRuO3 薄膜中的非常规二维量子振荡

SrRuO3 是一种典型的过渡金属氧化物，具有丰富的物理特性，包括巡回铁磁性、高导电性和源自韦尔点的本征霍尔效应。最近有报道称，残余电阻率比超过 50 的高质量 SrRuO3 薄膜尽管具有很强的电子相关性，但在低温下仍会出现量子振荡。虽然人们根据韦尔半金属带结构讨论了与韦尔轨道有关的振荡起源，但迄今为止，实验报告的结果既不相互一致，也不符合理论预期行为，因此 SrRuO3 薄膜中振荡的起源仍然难以捉摸。在本报告中，我们仔细评估了在残余电阻率比高达 RRR = 82 的三维厚 SrRuO3 薄膜中观察到的量子振荡。我们发现两种振荡成分同时存在，它们都来自二维电子态，且质量略有不同，这表明不同韦尔点对之间形成的表面费米弧态参与其中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.