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28 papers · 2 filters
Soft x-ray magnetic circular dichroism study of Ca_1-xSr_xRuO_3 across the ferromagnetic quantum phase transition
J. Okamoto, T. Okane, Y. Saitoh +10
Ca_1-xSr_xRuO_3, which is ferromagnetic for Sr concentration x > 0.3, has been studied by x-ray magnetic circular dichroism (XMCD) in Ru 3p and O 1s core-level x-ray absorption. XM…
Electronic Correlations within Fermionic Lattice Models
M. Matlak, B. Grabiec, S. Krawiec
We investigate two-site electronic correlations within generalized Hubbard model, which incorporates the conventional Hubbard model (parameters: (hopping between nearest neighb…
Rigorous Solution of the Spin-1 Quantum Ising Model with Single-ion Anisotropy
Zhihua Yang, Liping Yang, Jianhui Dai +1
We solve the spin-1 quantum Ising model with single-ion anisotropy by mapping it onto a series of segmented spin-1/2 transverse Ising chains, separated by the states calle…
Electric Transport Theory of Dirac Fermions in Graphene
Xin-Zhong Yan, Yousef Romiah, C. S. Ting
Using the self-consistent Born approximation to the Dirac fermions under finite-range impurity scatterings, we show that the current-current correlation function is determined by f…
Unidirectional d-wave superconducting domains in the two-dimensional t-J model
Marcin Raczkowski, Manuela Capello, Didier Poilblanc +2
Motivated by the recently observed pattern of unidirectional domains in high-T_c superconductors [Y. Kohsaka et al., Science 315, 1380 (2007)], we investigate the emergence of spon…
Mosaic spin models with topological order
S. Yang, D. L. Zhou, C. P. Sun
We study a class of two-dimensional spin models with the Kitaev-type couplings in mosaic structure lattices to implement topological orders. We show that they are exactly solvable…