Andrés F. Santander-Syro

Kinetic energy change with doping upon superfluid condensation in high-temperature superconductors

In conventional BCS superconductors, the electronic kinetic energy increases upon superfluid condensation (the change DEkin is positive). Here we show that in the high critical temperature superconductor Bi-2212, DEkin crosses over from a fully compatible conventional BCS behavior (DEkin>0) to an unconventional behavior (DEkin<0) as the free carrier density decreases. If a single mechanism is responsible for superconductivity across the whole phase diagram of high critical temperature superconductors, this mechanism should allow for a smooth transition between such two regimes around optimal doping.

Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3

Strong electron correlations in solids are at the heart of fascinating phenomena such as high temperature superconductivity, whose understanding remains a prominent open problem in Physics. A central prediction of dynamical mean field theory (DMFT) is the breaking of Landaus Fermi liquid, which describes extremely well simple metals like copper, into itinerant heavy quasiparticles and localized Mott-Hubbard states. To test it, electronic structure calculations based on DMFT are usually benchmarked against the photoemission spectra of SrVO

Anomalous dispersion in the autocorrelation of angle-resolved photoemission spectra of high-temperature Bi2 Sr2 Ca Cu2 O8+δ superconductors

{}_{3}

Temperature dependence of the spectral weight in p- and n-type cuprates: A study of normal state partial gaps and electronic kinetic energy

, a cubic perovskite with one

Two-dimensional electron system at the magnetically tunable EuO/SrTiO3 interface

d

Two-dimensional electron systems in ATiO3 perovskites (A = Ca, Ba, Sr): control of orbital hybridization and order

electron per unit cell that is considered the gold standard in this field. However, the present study shows that the UV synchrotron radiation used in the photoemission experiments creates oxygen vacancies, resulting in a strong peak of defect states essentially on top of the SrVO

Anomalous dispersion in the autocorrelation of ARPES data of Bi

{}_{3}

_2

Hubbard band. As recent works found that the same peak of vacancy states occurs in noncorrelated wide-gap

Sr

{d}^{0}

_2

insulators, such as SrTiO