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Zhang H, Sanchez JJ, Chu JH, Liu J. Perspective: probing elasto-quantum materials with x-ray techniques and in situanisotropic strain. J Phys Condens Matter 2024; 36:333002. [PMID: 38722324 DOI: 10.1088/1361-648x/ad493e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 05/09/2024] [Indexed: 05/22/2024]
Abstract
Anisotropic lattice deformation plays an important role in the quantum mechanics of solid state physics. The possibility of mediating the competition and cooperation among different order parameters by applyingin situstrain/stress on quantum materials has led to discoveries of a variety of elasto-quantum effects on emergent phenomena. It has become increasingly critical to have the capability of combining thein situstrain tuning with x-ray techniques, especially those based on synchrotrons, to probe the microscopic elasto-responses of the lattice, spin, charge, and orbital degrees of freedom. Herein, we briefly review the recent studies that embarked on utilizing elasto-x-ray characterizations on representative material systems and demonstrated the emerging opportunities enabled by this method. With that, we further discuss the promising prospect in this rising area of quantum materials research and the bright future of elasto-x-ray techniques.
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Affiliation(s)
- Han Zhang
- Changzhou University, Changzhou, Jiangsu 213001, People's Republic of China
| | - Joshua J Sanchez
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States of America
| | - Jiun-Haw Chu
- Department of Physics, University of Washington, Seattle, WA 98195, United States of America
| | - Jian Liu
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, United States of America
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Kashikar R, DeTellem D, Ghosh PS, Xu Y, Ma S, Witanachchi S, Phan MH, Lisenkov S, Ponomareva I. Coupling of the Structure and Magnetism to Spin Splitting in Hybrid Organic-Inorganic Perovskites. J Am Chem Soc 2024; 146:13105-13112. [PMID: 38690965 DOI: 10.1021/jacs.3c14744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Hybrid organic-inorganic perovskites are famous for the diversity of their chemical compositions, phases, phase transitions, and associated physical properties. We use a combination of experimental and computational techniques to reveal a strong coupling between structure, magnetism, and spin splitting in a representative of the largest family of hybrid organic-inorganic perovskites: the formates. With the help of first-principles simulations, we find spin splitting in both conduction and valence bands of [NH2NH3]Co(HCOO)3 induced by spin-orbit interactions, which can reach up to 14 meV. Our magnetic measurements reveal that this material exhibits canted antiferromagnetism below 15.5 K. The direction of the associated antiferromagnetic order parameter is strongly coupled with spin splitting in the centrosymmetric phase, allowing for the creation and annihilation of spin splitting through the application of a magnetic field. Furthermore, the structural phase transition to the experimentally observed polar Pna21 phase completely changes the aforementioned spin splitting and its coupling to magnetic degrees of freedom. This reveals that in [NH2NH3]Co(HCOO)3, the structure and magnetism are strongly coupled to spin splitting and can be manipulated through electric and magnetic fields. We believe that our findings offer an important step toward a fundamental understanding and practical applications of materials with coupled properties.
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Affiliation(s)
- Ravi Kashikar
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Derick DeTellem
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Partha Sarathi Ghosh
- Glass & Advanced Materials Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Yixuan Xu
- Department of Chemistry, University of North Texas, CHEM 305D, 1508 W Mulberry Street, Denton, Texas 76201, United States
| | - Shengqian Ma
- Department of Chemistry, University of North Texas, CHEM 305D, 1508 W Mulberry Street, Denton, Texas 76201, United States
| | - Sarath Witanachchi
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Manh-Huong Phan
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Sergey Lisenkov
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Inna Ponomareva
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
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Guo Y, Zhang J, Zhu Z, Jiang YY, Jiang L, Wu C, Dong J, Xu X, He W, He B, Huang Z, Du L, Zhang G, Wu K, Han X, Shao DF, Yu G, Wu H. Direct and Inverse Spin Splitting Effects in Altermagnetic RuO 2. Adv Sci (Weinh) 2024:e2400967. [PMID: 38626379 DOI: 10.1002/advs.202400967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/18/2024] [Indexed: 04/18/2024]
Abstract
Recently, the altermagnetic materials with spin splitting effect (SSE), have drawn significant attention due to their potential to the flexible control of the spin polarization by the Néel vector. Here, the direct and inverse altermagnetic SSE (ASSE) in the (101)-oriented RuO2 film with the tilted Néel vector are reported. First, the spin torque along the x-, y-, and z-axis is detected from the spin torque-induced ferromagnetic resonance (ST-FMR), and the z-spin torque emerges when the electric current is along the [010] direction, showing the anisotropic spin splitting of RuO2. Further, the current-induced modulation of damping is used to quantify the damping-like torque efficiency (ξDL) in RuO2/Py, and an anisotropic ξDL is obtained and maximized for the current along the [010] direction, which increases with the reduction of the temperature, indicating the present of ASSE. Next, by way of spin pumping measurement, the inverse altermagnetic spin splitting effect (IASSE) is studied, which also shows a crystal direction-dependent anisotropic behavior and temperature-dependent behavior. This work gives a comprehensive study of the direct and inverse ASSE effects in the altermagnetic RuO2, inspiring future altermagnetic materials and devices with flexible control of spin polarization.
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Affiliation(s)
- Yaqin Guo
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Jing Zhang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Zengtai Zhu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Yuan-Yuan Jiang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China
- University of Science and Technology of China, Hefei, 230026, China
| | - Longxing Jiang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Chuangwen Wu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Jing Dong
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Xing Xu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Wenqing He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Bin He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zhiheng Huang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Luojun Du
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Guangyu Zhang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Kehui Wu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiufeng Han
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ding-Fu Shao
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China
- University of Science and Technology of China, Hefei, 230026, China
| | - Guoqiang Yu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Hao Wu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
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Reimers S, Odenbreit L, Šmejkal L, Strocov VN, Constantinou P, Hellenes AB, Jaeschke Ubiergo R, Campos WH, Bharadwaj VK, Chakraborty A, Denneulin T, Shi W, Dunin-Borkowski RE, Das S, Kläui M, Sinova J, Jourdan M. Direct observation of altermagnetic band splitting in CrSb thin films. Nat Commun 2024; 15:2116. [PMID: 38459058 PMCID: PMC10923844 DOI: 10.1038/s41467-024-46476-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/28/2024] [Indexed: 03/10/2024] Open
Abstract
Altermagnetism represents an emergent collinear magnetic phase with compensated order and an unconventional alternating even-parity wave spin order in the non-relativistic band structure. We investigate directly this unconventional band splitting near the Fermi energy through spin-integrated soft X-ray angular resolved photoemission spectroscopy. The experimentally obtained angle-dependent photoemission intensity, acquired from epitaxial thin films of the predicted altermagnet CrSb, demonstrates robust agreement with the corresponding band structure calculations. In particular, we observe the distinctive splitting of an electronic band on a low-symmetry path in the Brilliouin zone that connects two points featuring symmetry-induced degeneracy. The measured large magnitude of the spin splitting of approximately 0.6 eV and the position of the band just below the Fermi energy underscores the significance of altermagnets for spintronics based on robust broken time reversal symmetry responses arising from exchange energy scales, akin to ferromagnets, while remaining insensitive to external magnetic fields and possessing THz dynamics, akin to antiferromagnets.
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Affiliation(s)
- Sonka Reimers
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
| | - Lukas Odenbreit
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
| | - Libor Šmejkal
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
- Inst. of Physics Academy of Sciences of the Czech Republic, Cukrovarnická 10, Praha 6, Czech Republic
| | | | | | - Anna B Hellenes
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
| | | | - Warlley H Campos
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
| | - Venkata K Bharadwaj
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
| | - Atasi Chakraborty
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
| | - Thibaud Denneulin
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Wen Shi
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Rafal E Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Suvadip Das
- Department of Physics and Astronomy, George Mason University, Fairfax, VA, 22030, USA
- Center for Quantum Science and Engineering, George Mason University, Fairfax, VA, 22030, USA
| | - Mathias Kläui
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
- Centre for Quantum Spintronics, Norwegian University of Science and Technology NTNU, 7491, Trondheim, Norway
| | - Jairo Sinova
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
- Department of Physics, Texas A&M University, College Station, TX, 77843-4242, USA
| | - Martin Jourdan
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany.
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Autieri C. New type of magnetism splits from convention. Nature 2024; 626:482-483. [PMID: 38356062 DOI: 10.1038/d41586-024-00190-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
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