Xiaofeng Chen
(, ), Ping Wei
(, ), Tiantian Chen
(, ), Xianfeng Ye
(, ), Junjie Ge
(, ), Zhixin Tang
(, ), Wanting Zhu
(, ), Xiaolei Nie
(, ), Danqi He
(, ), Mingrui Liu
(, ), Wenyu Zhao
(, ), Qingjie Zhang
(, )
{"title":"增强稀磁性半导体Ge1−xMnxTe热电输运性质的铁磁性","authors":"Xiaofeng Chen \n (, ), Ping Wei \n (, ), Tiantian Chen \n (, ), Xianfeng Ye \n (, ), Junjie Ge \n (, ), Zhixin Tang \n (, ), Wanting Zhu \n (, ), Xiaolei Nie \n (, ), Danqi He \n (, ), Mingrui Liu \n (, ), Wenyu Zhao \n (, ), Qingjie Zhang \n (, )","doi":"10.1007/s40843-025-3446-2","DOIUrl":null,"url":null,"abstract":"<div><p>IV–VI dilute magnetic semiconductor Mn-doped GeTe has garnered significant attention for its promising thermoelectric (TE) properties in the mid-temperature range. However, the impact of Mn on the transport properties of GeTe remains ambiguous. This study investigates the critical role of Mn doping in optimizing the TE properties of Ge<sub>1−<i>x</i></sub>Mn<sub><i>x</i></sub>Te alloys. The transport properties, magnetic properties, and lattice vibration behavior were characterized in the temperature range of 50–300 K. It was demonstrated that the incorporation of Mn significantly reduces carrier concentration and amplifies electron scattering, thereby optimizing the power factor with a two-fold increment. Apart from the enhanced alloy scattering, Mn doping causes the softening of optical phonons and reduced phonon group velocity, therefore, a remarkable suppression in lattice thermal conductivity. Furthermore, the ferromagnetism of Mn contributes to the TE performance of Ge<sub>1−<i>x</i></sub>Mn<sub><i>x</i></sub>Te as it benefits from the depressed phonon modes of magnetic excitation. This work provides a strategic insight into optimizing TE performance for advancing GeTe-based dilute magnetic semiconductors.\n</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"68 8","pages":"2841 - 2849"},"PeriodicalIF":7.4000,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ferromagnetism enhancing thermoelectric transport properties in dilute magnetic semiconductor Ge1−xMnxTe\",\"authors\":\"Xiaofeng Chen \\n (, ), Ping Wei \\n (, ), Tiantian Chen \\n (, ), Xianfeng Ye \\n (, ), Junjie Ge \\n (, ), Zhixin Tang \\n (, ), Wanting Zhu \\n (, ), Xiaolei Nie \\n (, ), Danqi He \\n (, ), Mingrui Liu \\n (, ), Wenyu Zhao \\n (, ), Qingjie Zhang \\n (, )\",\"doi\":\"10.1007/s40843-025-3446-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>IV–VI dilute magnetic semiconductor Mn-doped GeTe has garnered significant attention for its promising thermoelectric (TE) properties in the mid-temperature range. However, the impact of Mn on the transport properties of GeTe remains ambiguous. This study investigates the critical role of Mn doping in optimizing the TE properties of Ge<sub>1−<i>x</i></sub>Mn<sub><i>x</i></sub>Te alloys. The transport properties, magnetic properties, and lattice vibration behavior were characterized in the temperature range of 50–300 K. It was demonstrated that the incorporation of Mn significantly reduces carrier concentration and amplifies electron scattering, thereby optimizing the power factor with a two-fold increment. Apart from the enhanced alloy scattering, Mn doping causes the softening of optical phonons and reduced phonon group velocity, therefore, a remarkable suppression in lattice thermal conductivity. Furthermore, the ferromagnetism of Mn contributes to the TE performance of Ge<sub>1−<i>x</i></sub>Mn<sub><i>x</i></sub>Te as it benefits from the depressed phonon modes of magnetic excitation. This work provides a strategic insight into optimizing TE performance for advancing GeTe-based dilute magnetic semiconductors.\\n</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":773,\"journal\":{\"name\":\"Science China Materials\",\"volume\":\"68 8\",\"pages\":\"2841 - 2849\"},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2025-07-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science China Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s40843-025-3446-2\",\"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":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s40843-025-3446-2","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}
Ferromagnetism enhancing thermoelectric transport properties in dilute magnetic semiconductor Ge1−xMnxTe
IV–VI dilute magnetic semiconductor Mn-doped GeTe has garnered significant attention for its promising thermoelectric (TE) properties in the mid-temperature range. However, the impact of Mn on the transport properties of GeTe remains ambiguous. This study investigates the critical role of Mn doping in optimizing the TE properties of Ge1−xMnxTe alloys. The transport properties, magnetic properties, and lattice vibration behavior were characterized in the temperature range of 50–300 K. It was demonstrated that the incorporation of Mn significantly reduces carrier concentration and amplifies electron scattering, thereby optimizing the power factor with a two-fold increment. Apart from the enhanced alloy scattering, Mn doping causes the softening of optical phonons and reduced phonon group velocity, therefore, a remarkable suppression in lattice thermal conductivity. Furthermore, the ferromagnetism of Mn contributes to the TE performance of Ge1−xMnxTe as it benefits from the depressed phonon modes of magnetic excitation. This work provides a strategic insight into optimizing TE performance for advancing GeTe-based dilute magnetic semiconductors.
期刊介绍:
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.