https://las493energy.files.wordpress.com/2014/11/2005_vetter_jpowsourc.pdf

Ageing mechanisms in lithium-ion batteries

The last decade witnessed significant progress in angle-resolved photoemission spectroscopy (ARPES) and its applications. Today, ARPES experiments with 2-meV energy resolution and $0.2\ifmmode^\circ\else\textdegree\fi{}$ angular resolution are a reality even for photoemission on solids. These technological advances and the improved sample quality have enabled ARPES to emerge as a leading tool in the investigation of the high-${T}_{c}$ superconductors. This paper reviews the most recent ARPES results on the cuprate superconductors and their insulating parent and sister compounds, with the purpose of providing an updated summary of the extensive literature. The low-energy excitations are discussed with emphasis on some of the most relevant issues, such as the Fermi surface and remnant Fermi surface, the superconducting gap, the pseudogap and $d$-wave-like dispersion, evidence of electronic inhomogeneity and nanoscale phase separation, the emergence of coherent quasiparticles through the superconducting transition, and many-body effects in the one-particle spectral function due to the interaction of the charge with magnetic and/or lattice degrees of freedom. Given the dynamic nature of the field, we chose to focus mainly on reviewing the experimental data, as on the experimental side a general consensus has been reached, whereas interpretations and related theoretical models can vary significantly. The first part of the paper introduces photoemission spectroscopy in the context of strongly interacting systems, along with an update on the state-of-the-art instrumentation. The second part provides an overview of the scientific issues relevant to the investigation of the low-energy electronic structure by ARPES. The rest of the paper is devoted to the experimental results from the cuprates, and the discussion is organized along conceptual lines: normal-state electronic structure, interlayer interaction, superconducting gap, coherent superconducting peak, pseudogap, electron self-energy, and collective modes. Within each topic, ARPES data from the various copper oxides are presented.

https://arxiv.org/pdf/cond-mat/0208504.pdf

Angle-resolved photoemission studies of the cuprate superconductors

http://sces.phys.utk.edu/mostcited/mc1_1114.pdf

Colossal Magnetoresistant Materials: The Key Role of Phase Separation

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.

http://science.sciencemag.org/content/sci/288/5465/462.full.pdf

Orbital Physics in Transition-Metal Oxides

Using the full-potential screened Korringa-Kohn-Rostoker method we study the full-Heusler alloys based on Co, Fe, Rh, and Ru. We show that many of these compounds show a half-metallic behavior; however, in contrast to the half-Heusler alloys the energy gap in the minority band is extremely small due to states localized only at the Co (Fe, Rh, or Ru) sites which are not present in the half-Heusler compounds. The full-Heusler alloys show a Slater-Pauling behavior and the total spin magnetic moment per unit cell ${(M}_{t})$ scales with the total number of valence electrons ${(Z}_{t})$ following the rule ${M}_{t}{=Z}_{t}\ensuremath{-}24.$ We explain why the spin-down band contains exactly 12 electrons using arguments based on group theory and show that this rule holds also for compounds with less than 24 valence electrons. Finally we discuss the deviations from this rule and the differences compared to the half-Heusler alloys.

/pdf/slater-pauling-behavior-and-origin-of-the-half-metallicity-1vlzvqk1h0.pdf

Slater-Pauling behavior and origin of the half-metallicity of the full-Heusler alloys

Noncollinear antiferromagnetic structure and commensurate—incommensurate transition of DyNiC2 studied by magnetization measurement, neutron diffraction and 161Dy Mössbauer spectroscopy

Antiferromagnetism of GdCoC2 and GdNiC2 intermetallics studied by magnetization measurement and 155Gd Mössbauer spectroscopy

https://ir.lib.hiroshima-u.ac.jp/files/public/2/26513/2014101615450663814/JPCS_60_1511.pdf

Hydrogen in β-ZrNCl

It is experimentally known that an antiferromagnetic compound CrSb ( T N ≧700 K) with a NiAs type crystal structure exhibits unusual magnetic properties, that is, sharp decrease of magnetic moment, steep increase of magnetic specific heat and of magnetic susceptibility just below T N with increasing temperature. These unusual behaviours are discussed on the basis of a molecular field theory by taking into account anisotropic strain dependence of exchange interactions. And it is pointed out that an effect of anisotropic normal thermal expansion of the crystal lattice can not be neglected.

Masayoshi Ohashi

Papers

Noncollinear antiferromagnetic structure and commensurate—incommensurate transition of DyNiC2 studied by magnetization measurement, neutron diffraction and 161Dy Mössbauer spectroscopy

Antiferromagnetism of GdCoC2 and GdNiC2 intermetallics studied by magnetization measurement and 155Gd Mössbauer spectroscopy

Hydrogen in β-ZrNCl

Magnetic Properties of CrSb

Neutron Diffraction Study of CaFe 2 O 4