8 papers
Competition of Orbital Antiferromagnetism With Q-Triplet-Pairing in the Ferromagnetic Superconductor UGe
G. Varelogiannis, P. Thalmeier, S. Tsonis
Within a multicomponent BCS-like framework we study the coexistence and competition of various CDW and SC order parameters in the presence of a strong ferromagnetic background. We…
New Magnetic-Field-Induced Macroscopic Quantum Phenomenon in High- Cuprates: Confined Field-Induced Density Waves in the Superconducting State
G. Varelogiannis, M. Heritier
We reveal a novel macroscopic quantum phenomenon induced by a magnetic field. It corresponds to the {\it non-integer quantization of the superfluid density} in a superconductor wit…
New magnetic-field-induced macroscopic quantum phenomenon in a superconductor with gap nodes
Georgios Varelogiannis, Michel Heritier
High- superconductivity is unconventional because the gap is not isotropic as in simple metals but has symmetry with lines of nodes. In a fascinating thermal tra…
Unconventional Superconductivity in UPd_2Al_3 from Realistic Selfconsistent Calculations
P. M. Oppeneer, G. Varelogiannis
Realistic selfconsistent calculations of unconventional superconductivity in a heavy-fermion material are reported. Our calculations for UPdAl start from accurate energy ba…
Localization corrections and small-q phonon-mediated unconventional superconductivity in the cuprates
G. Varelogiannis
Taking into account the first localization corrections in the electron-impurity self-energy we study the effect of non-magnetic impurities on unconventional superconductivity (SC)…
Ferromagnetism and Colossal Magnetoresistance from the Coexistence of Comparable Charge and Spin Density Orders
Georgios Varelogiannis
We report a complete multicomponent mean-field-theory for the coexistence and competition of charge ordering (CO), antiferromagnetic (AFM) and ferromagnetic (FM) spin ordering in t…