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27 papers · 2 filters
Crossover from dilute-Kondo system to heavy-fermion system
Hiroshi Watanabe, Masao Ogata
Ground state properties of a Kondo lattice model with random configuration of electrons are investigated with a variational Monte Carlo method. We show that the crossover from…
Perovskite Manganites Hosting Versatile Multiferroic Phases with Symmetric and Antisymmetric Exchange Strictions
S. Ishiwata, Y. Kaneko, Y. Tokunaga +3
Complete magnetoelectric (ME) phase diagrams of orthorhombic MnO with and without magnetic moments on the ions have been established. Three kinds of multiferroic groun…
What relaxes muon spins in molecular nanomagnets?
T. Lancaster, S. J. Blundell, F. L. Pratt +9
We address the cause of the unusual muon spin relaxation (muSR) results on molecular nanomagnets (MNMs). Through measurements on protonated and deuterated samples of the MNMs Cr7Mn…
Dilute-Bose-Gas Approach to ground state phases of 3D quantum helimagnets under high magnetic field
H. T. Ueda, K. Totsuka, T. Momoi
We study high-field phase diagram and low-energy excitations of three-dimensional quantum helimagnets. Slightly below the saturation field, the emergence of magnetic order may be m…
Field-induced carrier delocalization in the strain-induced Mott insulating state of an organic superconductor
Yoshitaka Kawasugi, Hiroshi M. Yamamoto, Naoya Tajima +3
We report the influence of the field effect on the dc resistance and Hall coefficient in the strain-induced Mott insulating state of an organic superconductor -(BEDT-TTF)C…
Epitaxial-strain effect on charge/orbital order in Pr0.5Ca0.5MnO3 films
D. Okuyama, M. Nakamura, Y. Wakabayashi +7
Effect of growth orientation on charge- and orbital-ordering (CO-OO) phenomena has been studied for Pr0.5Ca0.5MnO3 epitaxial thin films fabricated on (LaAlO3)0.3-(SrAl0.5Ta0.5O3)0.…