P.F. Shan , X. Han , X. Li , Z.Y. Liu , P.T. Yang , B.S. Wang , J.F. Wang , H.Y. Liu , Y.G. Shi , J.P. Sun , J.-G. Cheng
{"title":"范德华簇莫特绝缘体Nb3Cl8的压力诱导金属态","authors":"P.F. Shan , X. Han , X. Li , Z.Y. Liu , P.T. Yang , B.S. Wang , J.F. Wang , H.Y. Liu , Y.G. Shi , J.P. Sun , J.-G. Cheng","doi":"10.1016/j.mtphys.2023.101267","DOIUrl":null,"url":null,"abstract":"<div><p><span>We report on the pressure-induced metallization<span> of a van der Waals cluster Mott insulator Nb</span></span><sub>3</sub>Cl<sub>8</sub> by employing the resistivity measurements under high pressure. Upon compression, its resistance and energy gap are suppressed gradually with exhibiting the fully metallic state at a critical pressure of <em>P</em><sub>c</sub> ≈ 70 GPa. Hall resistance measurements revealed a significant band-structure reconstruction around <em>P</em><sub>c</sub><span>, where the dominant charge carriers are altered from hole-to electron-type and the carrier concentration experiences a sharp increase in the metallic state. In addition, high-pressure synchrotron<span> XRD measurements uncover a possible structural phase transition around </span></span><em>P</em><sub>c</sub>. Our further first-principles calculations reproduced the pressure-driven structure transition and the corresponding metallic state above <em>P</em><sub>c</sub>. The present study demonstrates a feasible high-pressure route to realize the metallization of cluster Mott insulator Nb<sub>3</sub>Cl<sub>8</sub>.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"38 ","pages":"Article 101267"},"PeriodicalIF":10.0000,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pressure-induced metallic state in a van der Waals cluster Mott insulator Nb3Cl8\",\"authors\":\"P.F. Shan , X. Han , X. Li , Z.Y. Liu , P.T. Yang , B.S. Wang , J.F. Wang , H.Y. Liu , Y.G. Shi , J.P. Sun , J.-G. Cheng\",\"doi\":\"10.1016/j.mtphys.2023.101267\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span>We report on the pressure-induced metallization<span> of a van der Waals cluster Mott insulator Nb</span></span><sub>3</sub>Cl<sub>8</sub> by employing the resistivity measurements under high pressure. Upon compression, its resistance and energy gap are suppressed gradually with exhibiting the fully metallic state at a critical pressure of <em>P</em><sub>c</sub> ≈ 70 GPa. Hall resistance measurements revealed a significant band-structure reconstruction around <em>P</em><sub>c</sub><span>, where the dominant charge carriers are altered from hole-to electron-type and the carrier concentration experiences a sharp increase in the metallic state. In addition, high-pressure synchrotron<span> XRD measurements uncover a possible structural phase transition around </span></span><em>P</em><sub>c</sub>. Our further first-principles calculations reproduced the pressure-driven structure transition and the corresponding metallic state above <em>P</em><sub>c</sub>. The present study demonstrates a feasible high-pressure route to realize the metallization of cluster Mott insulator Nb<sub>3</sub>Cl<sub>8</sub>.</p></div>\",\"PeriodicalId\":18253,\"journal\":{\"name\":\"Materials Today Physics\",\"volume\":\"38 \",\"pages\":\"Article 101267\"},\"PeriodicalIF\":10.0000,\"publicationDate\":\"2023-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Today Physics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2542529323003036\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Physics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2542529323003036","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Pressure-induced metallic state in a van der Waals cluster Mott insulator Nb3Cl8
We report on the pressure-induced metallization of a van der Waals cluster Mott insulator Nb3Cl8 by employing the resistivity measurements under high pressure. Upon compression, its resistance and energy gap are suppressed gradually with exhibiting the fully metallic state at a critical pressure of Pc ≈ 70 GPa. Hall resistance measurements revealed a significant band-structure reconstruction around Pc, where the dominant charge carriers are altered from hole-to electron-type and the carrier concentration experiences a sharp increase in the metallic state. In addition, high-pressure synchrotron XRD measurements uncover a possible structural phase transition around Pc. Our further first-principles calculations reproduced the pressure-driven structure transition and the corresponding metallic state above Pc. The present study demonstrates a feasible high-pressure route to realize the metallization of cluster Mott insulator Nb3Cl8.
期刊介绍：
Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.
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