Mattia Fanetti, Katja Ferfolja, Sandra Gardonio, Matjaž Valant
{"title":"铂与 Bi2Se3 之间的界面:不稳定性与新有序相的形成","authors":"Mattia Fanetti, Katja Ferfolja, Sandra Gardonio, Matjaž Valant","doi":"10.1016/j.apsadv.2024.100610","DOIUrl":null,"url":null,"abstract":"<div><p>In this work the interface between a Pt film and a Bi<sub>2</sub>Se<sub>3</sub> (0001) surface is investigated using electron microscopy and microanalysis, in order to characterize the structure of the interface and verify if it is chemically stable or an interaction occurs. At room temperature, the Pt film is composed of small clusters (∼10 nm) and the interface is stable. However, already upon mild annealing (200 °C) the interface displays instability and forms an interfacial phase. The interfacial phase, not previously reported in literature, is a long-range ordered ternary Pt:Bi:Se phase aligned with the Bi<sub>2</sub>Se<sub>3</sub> crystal, most probably an intermetallic compound. The presence of a new phase at Pt/Bi<sub>2</sub>Se<sub>3</sub> interface, together with the possible effects on the topological surface states, has to be considered in all the applied studies where this interface is present, as well as in the models for theoretical studies.</p></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":null,"pages":null},"PeriodicalIF":7.5000,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666523924000382/pdfft?md5=0fe609b3fff8e988f2b947afe471ac1d&pid=1-s2.0-S2666523924000382-main.pdf","citationCount":"0","resultStr":"{\"title\":\"The interface between Pt and Bi2Se3: Instability and formation of a new ordered phase\",\"authors\":\"Mattia Fanetti, Katja Ferfolja, Sandra Gardonio, Matjaž Valant\",\"doi\":\"10.1016/j.apsadv.2024.100610\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this work the interface between a Pt film and a Bi<sub>2</sub>Se<sub>3</sub> (0001) surface is investigated using electron microscopy and microanalysis, in order to characterize the structure of the interface and verify if it is chemically stable or an interaction occurs. At room temperature, the Pt film is composed of small clusters (∼10 nm) and the interface is stable. However, already upon mild annealing (200 °C) the interface displays instability and forms an interfacial phase. The interfacial phase, not previously reported in literature, is a long-range ordered ternary Pt:Bi:Se phase aligned with the Bi<sub>2</sub>Se<sub>3</sub> crystal, most probably an intermetallic compound. The presence of a new phase at Pt/Bi<sub>2</sub>Se<sub>3</sub> interface, together with the possible effects on the topological surface states, has to be considered in all the applied studies where this interface is present, as well as in the models for theoretical studies.</p></div>\",\"PeriodicalId\":34303,\"journal\":{\"name\":\"Applied Surface Science Advances\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.5000,\"publicationDate\":\"2024-05-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2666523924000382/pdfft?md5=0fe609b3fff8e988f2b947afe471ac1d&pid=1-s2.0-S2666523924000382-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Surface Science Advances\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666523924000382\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Surface Science Advances","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666523924000382","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
The interface between Pt and Bi2Se3: Instability and formation of a new ordered phase
In this work the interface between a Pt film and a Bi2Se3 (0001) surface is investigated using electron microscopy and microanalysis, in order to characterize the structure of the interface and verify if it is chemically stable or an interaction occurs. At room temperature, the Pt film is composed of small clusters (∼10 nm) and the interface is stable. However, already upon mild annealing (200 °C) the interface displays instability and forms an interfacial phase. The interfacial phase, not previously reported in literature, is a long-range ordered ternary Pt:Bi:Se phase aligned with the Bi2Se3 crystal, most probably an intermetallic compound. The presence of a new phase at Pt/Bi2Se3 interface, together with the possible effects on the topological surface states, has to be considered in all the applied studies where this interface is present, as well as in the models for theoretical studies.