{"title":"Modified electronic structure of amorphous Mn‐Si‐Te for OTS application: Improved thermal stability by the formation of Mn‐Te bonding","authors":"Kentaro Saito, Shogo Hatayama, Yuta Saito","doi":"10.1002/pssr.202300474","DOIUrl":null,"url":null,"abstract":"A critical element within the 3D Xpoint architecture is the Ovonic threshold switch (OTS) material, which serves a crucial role as a selector. The development of novel OTS materials devoid of hazardous elements such as As and Se is imperative for mitigating environmental impact. The Si‐Te binary telluride is a representative As/Se‐free OTS material, demonstrating stable switching. However, its thermal stability is insufficient for enduring annealing processes in semiconductor manufacturing. To address this challenge, this study proposes the incorporation of Mn into the Si‐Te alloy. While the introduction of transition metals into chalcogenide glass typically reduces the electrical resistivity, potentially compromising the ON/OFF ratio, the off current for the device containing 26 at.% Mn is observed to be lower than that for the undoped Si‐Te device. Furthermore, the thermal stability of the Mn‐Si‐Te film surpasses that of its pristine counterpart. X‐ray photoelectron spectroscopy and density functional theory simulations provide evidence of Mn‐Te bonding formation in the Mn‐Si‐Te amorphous alloy, thus suggesting the role of Mn‐Te bonding in enhancing thermal stability. These findings provide a promising avenue for the advancement of novel OTS materials.This article is protected by copyright. All rights reserved.","PeriodicalId":54619,"journal":{"name":"Physica Status Solidi-Rapid Research Letters","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica Status Solidi-Rapid Research Letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1002/pssr.202300474","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A critical element within the 3D Xpoint architecture is the Ovonic threshold switch (OTS) material, which serves a crucial role as a selector. The development of novel OTS materials devoid of hazardous elements such as As and Se is imperative for mitigating environmental impact. The Si‐Te binary telluride is a representative As/Se‐free OTS material, demonstrating stable switching. However, its thermal stability is insufficient for enduring annealing processes in semiconductor manufacturing. To address this challenge, this study proposes the incorporation of Mn into the Si‐Te alloy. While the introduction of transition metals into chalcogenide glass typically reduces the electrical resistivity, potentially compromising the ON/OFF ratio, the off current for the device containing 26 at.% Mn is observed to be lower than that for the undoped Si‐Te device. Furthermore, the thermal stability of the Mn‐Si‐Te film surpasses that of its pristine counterpart. X‐ray photoelectron spectroscopy and density functional theory simulations provide evidence of Mn‐Te bonding formation in the Mn‐Si‐Te amorphous alloy, thus suggesting the role of Mn‐Te bonding in enhancing thermal stability. These findings provide a promising avenue for the advancement of novel OTS materials.This article is protected by copyright. All rights reserved.
期刊介绍:
Physica status solidi (RRL) - Rapid Research Letters was designed to offer extremely fast publication times and is currently one of the fastest double peer-reviewed publication media in solid state and materials physics. Average times are 11 days from submission to first editorial decision, and 12 days from acceptance to online publication. It communicates important findings with a high degree of novelty and need for express publication, as well as other results of immediate interest to the solid-state physics and materials science community. Published Letters require approval by at least two independent reviewers.
The journal covers topics such as preparation, structure and simulation of advanced materials, theoretical and experimental investigations of the atomistic and electronic structure, optical, magnetic, superconducting, ferroelectric and other properties of solids, nanostructures and low-dimensional systems as well as device applications. Rapid Research Letters particularly invites papers from interdisciplinary and emerging new areas of research.