Journal ArticleDOI
Orbital Physics in Transition-Metal Oxides
Yoshinori Tokura,Naoto Nagaosa +1 more
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TLDR
An overview is given here on this "orbital physics," which will be a key concept for the science and technology of correlated electrons.Abstract:
An electron in a solid, that is, bound to or nearly localized on the specific atomic site, has three attributes: charge, spin, and orbital. The orbital represents the shape of the electron cloud in solid. In transition-metal oxides with anisotropic-shaped d-orbital electrons, the Coulomb interaction between the electrons (strong electron correlation effect) is of importance for understanding their metal-insulator transitions and properties such as high-temperature superconductivity and colossal magnetoresistance. The orbital degree of freedom occasionally plays an important role in these phenomena, and its correlation and/or order-disorder transition causes a variety of phenomena through strong coupling with charge, spin, and lattice dynamics. An overview is given here on this "orbital physics," which will be a key concept for the science and technology of correlated electrons.read more
Citations
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Journal ArticleDOI
Spin liquids in frustrated magnets
TL;DR: This exotic behaviour of frustrated magnets is now being uncovered in the laboratory, providing insight into the properties of spin liquids and challenges to the theoretical description of these materials.
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Angle-resolved photoemission studies of the cuprate superconductors
TL;DR: A review of the most recent ARPES results on the cuprate superconductors and their insulating parent and sister compounds is presented in this article, with the purpose of providing an updated summary of the extensive literature.
Journal ArticleDOI
Real-space observation of a two-dimensional skyrmion crystal
X. Z. Yu,Yoshinori Onose,Naoya Kanazawa,Jin-Hong Park,Jung Hoon Han,Yoshio Matsui,Naoto Nagaosa,Yoshinori Tokura +7 more
TL;DR: Real-space imaging of a two-dimensional skyrmion lattice in a thin film of Fe0.5Co 0.5Si using Lorentz transmission electron microscopy reveals a controlled nanometre-scale spin topology, which may be useful in observing unconventional magneto-transport effects.
Journal ArticleDOI
Complexity in Strongly Correlated Electronic Systems
TL;DR: The spontaneous emergence of electronic nanometer-scale structures in transition metal oxides, and the existence of many competing states, are properties often associated with complex matter where nonlinearities dominate, such as soft materials and biological systems.
Journal ArticleDOI
Inorganic caesium lead iodide perovskite solar cells
Giles E. Eperon,Giuseppe M. Paternò,Giuseppe M. Paternò,Rebecca J. Sutton,Andrea Zampetti,Andrea Zampetti,Amir A. Haghighirad,Franco Cacialli,Franco Cacialli,Henry J. Snaith +9 more
TL;DR: In this paper, the authors showed that the organic cation is not essential, but simply a convenience for forming lead triiodide perovskites with good photovoltaic properties.
References
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Journal ArticleDOI
Magnetic Ordering and Relation to the Metal-Insulator Transition in Pr 1 − x Sr x MnO 3 and Nd 1 − x Sr x MnO 3 with x ∼ 1 / 2
TL;DR: In this article, the authors studied three distorted perovskite manganites, Pr{sub 1/2}Sr {sub 1 2}MnO {sub 3} and Nd{sub 0.45} Sr{sub0.55} MnO{sub 3] with x=1/2 and 0.55 by the neutron diffraction technique.
Journal ArticleDOI
Direct Observation of Charge and Orbital Ordering in La 0.5 Sr 1.5 MnO 4
Yasukazu Murakami,H. Kawada,H. Kawata,M. Tanaka,Taka-hisa Arima,Yutaka Moritomo,Yoshinori Tokura +6 more
TL;DR: In this article, the alternating pattern of charge ordering and orbital ordering in real space was observed directly by making use of their anomalous dispersion using synchrotron x-ray diffraction.
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Anomalous variation of optical spectra with spin polarization in double-exchange ferromagnet: La1-xSrxMnO3.
Yoichi Okimoto,Takuro Katsufuji,T. Ishikawa,A. Urushibara,Taka-hisa Arima,Yasuhiro Tokura,Yasuhiro Tokura +6 more
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Hole-concentration-induced transformation of the magnetic and orbital structures in Nd 1 − x Sr x MnO 3
Ryoichi Kajimoto,Hideki Yoshizawa,Hazuki Kawano,Hideki Kuwahara,Yasuhiro Tokura,Kenji Ohoyama,Masayoshi Ohashi +6 more
TL;DR: In this paper, a peformed neutron diffraction measurements on melt-grown polycrystalline samples of the MnOµµ system was performed and a systematic transformation of the crystalline and magnetic structures of this system was observed.
Journal ArticleDOI
Orbital-State-Mediated Phase-Control of Manganites
Yoshinori Konishi,Zhong Fang,Makoto Izumi,Takashi Manako,M. Kasai,Hideki Kuwahara,Masashi Kawasaki,Kiyoyuki Terakura,Yoshinori Tokura +8 more
TL;DR: Using the epitaxial strain, the magnetic and electronic phases can be controlled for thin films of the manganites, La1-xSrxMnO3, grown on perovskite substrates with various lattice parameters as discussed by the authors.