Stoichiometry-induced ferromagnetism in altermagnetic candidate MnTe
Michael Chilcote, Alessandro R. Mazza, Qiangsheng Lu, Isaiah Gray, Qi Tian, Qinwen Deng, Duncan Moseley, An-Hsi Chen, Jason Lapano, Jason S. Gardner, Gyula Eres… 展开作者
Michael Chilcote, Alessandro R. Mazza, Qiangsheng Lu, Isaiah Gray, Qi Tian, Qinwen Deng, Duncan Moseley, An-Hsi Chen, Jason Lapano, Jason S. Gardner, Gyula Eres, T. Zac Ward, Erxi Feng, Huibo Cao, Valeria Lauter, Michael A. McGuire, Raphael Hermann, David Parker, Myung-Geun Han, Asghar Kayani, Gaurab Rimal, Liang Wu, Timothy R. Charlton, Robert G. Moore, Matthew Brahlek
The field of spintronics has seen a surge of interest in altermagnetism due to novel predictions and many possible applications. MnTe is a leading altermagnetic candidate that is of significant interest across spintronics due to its layered antiferromagnetic structure, high Neel temperature (TN ~ 310 K) and semiconducting properties. We present results on molecular beam epitaxy (MBE) grown MnTe/InP(111) films. Here, it is found that the electronic and magnetic properties are driven by the natural stoichiometry of MnTe. Electronic transport and in situ angle-resolved photoemission spectroscopy show the films are natively metallic with the Fermi level in the valence band and the band structure is in good agreement with first principles calculations for altermagnetic spin-splitting. Neutron diffraction confirms that the film is antiferromagnetic with planar anisotropy and polarized neutron reflectometry indicates weak ferromagnetism, which is linked to a slight Mn-richness that is intrinsic to the MBE grown samples. When combined with the anomalous Hall effect, this work shows that the electronic response is strongly affected by the ferromagnetic moment. Altogether, this highlights potential mechanisms for controlling altermagnetic ordering for diverse spintronic applications.
Effect of polar distortions on the linear and nonlinear anomalous Hall conductivity of altermagnetic $α$-MnTe
International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所马格托国际研究中心）；School of Quantum Physics and Matter, Institute for Research in Fundamental Sciences (IPM)（伊朗基础科学研究院量子物质学院）；Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所）
Atomic-Scale Observation of Symmetry Breaking in Altermagnetic MnTe
University of Washington（华盛顿大学）；University of Illinois Chicago（伊利诺伊大学芝加哥分校）；Uppsala University（乌普萨拉大学）；Rice University（莱斯大学）；Czech Academy of Sciences（捷克科学院）；Brno University of Technology（布尔诺理工大学）；University of Nottingham（诺丁汉大学）；Tohoku University（东北大学）；Pacific Northwest National Laboratory（太平洋西北国家实验室）
We report the growth of the intrinsic magnetic topological system MnTe(Bi2Te3)n by molecular beam epitaxy. By mapping the temperature and the Bi:Mn flux ratio, it is shown that there is a narrow growth window for the n=1 phase MnBi2Te4 with 2.0<Bi:Mn<2.6 at 225 °C. Here the films are stoichiometric and excess Bi and Te is not incorporated. At higher flux ratios (Bi:Mn>4.5) it is found that the n = 2 MnBi4Te7 phase is stabilized. Transport measurements indicate that the MnBi2Te4 and MnBi4Te7 undergo magnetic transitions around 25 K, and 10 K, respectively, consistent with antiferromagnetic phas…
Revisiting the symmetry and optical phonons of altermagnetic $α$-MnTe
Helmholtz-Zentrum Dresden-Rossendorf（德累斯顿罗森多夫亥姆霍兹中心）；Felix Bloch Institute for Solid-State Physics, University of Leipzig（莱比锡大学费利克斯·布洛赫固体物理研究所）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理学研究所）
Control of band structure in the altermagnetic candidate MnTe by temperature and strain
The University of Osaka（大阪大学）；Institute for Molecular Science（分子科学研究所）；The Institute for Solid State Physics, The University of Tokyo（东京大学固体物理研究所）；Institute for Chemical Research, Kyoto University（京都大学化学研究所）；Sogang University（西江大学）
Chiral Phonons Coupled to Spin-Split Bands in Altermagnetic CrSb and MnTe
CNR - Istituto Officina dei Materiali (IOM)（意大利国家研究委员会材料研究所）；Universität Würzburg（维尔茨堡大学）；Department of Physics and Astronomy, Alma Mater Studiorum, University of Bologna（博洛尼亚大学物理与天文学系）
Magnetically tunable symmetry-enforced nodal lines producing huge anomalous Hall conductivity in altermagnetic $α$-MnTe
International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所磁顶国际研究中心）；Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所）；New Technologies-Research Center, University of West Bohemia in Pilsen（比尔森西波希米亚大学新技术研究中心）；Photon Science Division, Paul Scherrer Institut（保罗谢尔研究所光子科学部）；Institute of Semiconductor and Solid State Physics, Johannes Kepler University of Linz（林茨约翰内斯开普勒大学半导体与固体物理研究所）；Solaris National Synchrotron Radiation Centre（索拉里斯国家同步辐射中心）
Giant spontaneous Kerr effect and its self-doping dependence in altermagnetic MnTe
University of California, Irvine（加州大学尔湾分校）；Pohang University of Science and Technology（浦项科技大学）；U.S. Naval Research Laboratory（美国海军研究实验室）；Rutgers University（罗格斯大学）；National TsingHua University（国立清华大学）
Loss of altermagnetic order and smooth restoration of Kramers' spin degeneracy with increasing temperature in CrSb and MnTe
H.H. Wills Physics Laboratory, University of Bristol（布里斯托大学 H.H. 威尔斯物理实验室）；Department of Physics, University of Warwick（华威大学物理系）；Institute for Theoretical Physics, Johannes Keppler University Linz（林茨约翰内斯·开普勒大学理论物理研究所）；Donostia International Physics Center（圣塞巴斯蒂安国际物理中心）；Max-Planck-Institut für Mikrostrukturphysik（马克斯·普朗克微结构物理研究所）
Strain continuously rotates the Néel vector in altermagnetic MnTe
University of California, Berkeley（加州大学伯克利分校）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；University of Notre Dame（圣母大学）；Stavropoulos Center for Complex Quantum Matter, University of Notre Dame（圣母大学斯塔夫罗普洛斯复杂量子物质中心）；University of Washington（华盛顿大学）；George Mason University（乔治梅森大学）；Quantum Science and Engineering Center, George Mason University（乔治梅森大学量子科学与工程中心）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；Institute of Science and Technology Austria（奥地利科学技术研究院）
Conductivity scaling of the anomalous Hall effect in the altermagnetic semiconductor α-MnTe
University of Notre Dame（圣母大学）；U.S. Naval Research Laboratory（美国海军研究实验室）；Stavropoulos Center for Quantum Matter, University of Notre Dame（圣母大学斯塔夫罗普洛斯量子物质中心）；Northeastern University（东北大学）；Quantum Materials and Sensing Institute, Northeastern University Innovation Campus（东北大学创新校区量子材料与传感研究所）；Synchrotron SOLEIL（SOLEIL同步辐射光源）；AGH University of Krakow（克拉科夫AGH科技大学）；Oak Ridge National Laboratory（橡树岭国家实验室）
Surface-State-Driven Anomalous Hall Effect in Altermagnetic MnTe Films
The Pennsylvania State University（宾夕法尼亚州立大学）；Weizmann Institute of Science（魏茨曼科学研究所）；Binghamton University（宾汉姆顿大学）；STFC Rutherford Appleton Laboratory（英国科学与技术设施理事会鲁瑟福阿普尔顿实验室）；National Institute of Standards and Technology（美国国家标准与技术研究院）
Thermally-driven reorientation of the Néel vector in altermagnetic MnTe
PSI Center for Neutron and Muon Sciences（瑞士保罗谢勒研究所中子与μ子科学中心）；Faculty of Mathematics and Physics, Charles University（布拉格查理大学数学与物理学院）；Institute of Physics, Czech Academy of Sciences（捷克科学院物理研究所）；Department of Condensed Matter Physics, Faculty of Science, Masaryk University（布尔诺马萨里克大学理学院凝聚态物理系）；School of Physics and Astronomy, University of Nottingham（诺丁汉大学物理与天文学学院）；PSI Center for Photon Science（瑞士保罗谢勒研究所光子科学中心）；Institut de Physique, École Polytechnique Fédérale de Lausanne（洛桑联邦理工学院物理研究所）
Observation of the Optical Phonons in α-MnTe films
University of Central Florida（中佛罗里达大学）；Nanoscience Technology Center, University of Central Florida（中佛罗里达大学纳米科学技术中心）；Department of Materials Science and Engineering, University of Central Florida（中佛罗里达大学材料科学与工程系）；Institute of Low Temperature and Structure Research, Polish Academy of Sciences（波兰科学院低温与结构研究所）；Institute of Nuclear Physics, Polish Academy of Sciences（波兰科学院核物理研究所）
Plaid-Like Spin Splitting and Chirality of Magnon Bands in Antiferromagnetic MnTe$_2$
Sejong University（世宗大学）；Korea Advanced Institute of Science and Technology (KAIST)（韩国科学技术院）；Sungkyunkwan University（成均馆大学）；Institute of Physics, Academia Sinica（中央研究院物理研究所）
