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11 papers
Study of the One- and Two-Band Models for Colossal Magnetoresistive Manganites Using the Truncated Polynomial Expansion Method
C. Sen, G. Alvarez, Y. Motome +5
Considerable progress has been recently made in the theoretical understanding of the colossal magnetoresistance (CMR) effect in manganites. The analysis of simple models with two c…
Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
I. A. Sergienko, E. Dagotto
With the perovskite multiferroic RMnO3 (R = Gd, Tb, Dy) as guidance, we argue that the Dzyaloshinskii-Moriya interaction (DMI) provides the microscopic mechanism for the coexistenc…
Goldstone-Mode Phonon Dynamics in the Pyrochlore Cd2Re2O7
C. A. Kendziora, I. A. Sergienko, R. Jin +4
We have measured the polarized Raman scattering spectra of Cd2Re2O7, the first superconducting pyrochlore, as a function of temperature. For temperatures below the cubic-to-tetrago…
Landau theory of superconducting phases in T_h crystals
S. H. Curnoe, I. A. Sergienko
We consider the Landau theory of phase transitions for multiple superconducting phases in T_h crystals. All possible phase transition sequences involving a single superconducting o…
Are Th doped Y2C3 and La2C3 two-band superconductors?
I. A. Sergienko
The superconducting sesquicarbides R2C3 have noncentrosymmetric point group symmetry Td. Spin-orbit coupling lifts the spin degeneracy of electronic bands in the most of the Brillo…
Order parameter in superconductors with non-degenerate bands
I. A. Sergienko, S. H. Curnoe
In noncentrosymmetric metals, the spin degeneracy of the electronic bands is lifted by spin-orbit coupling. We consider general symmetry properties of the pairing function Delta(k)…