vorige Woche
nächste Woche
Wochenprogramm 27.5.2019 – 2.6.2019
Prof. Dr. Armando Rastelli (Johannes Kepler Universität Linz)
Highly Entangled Photon Pairs from Semiconductor Quantum Dots
Physikalisches Kolloquium, Raum: T-1004
Prof. Dr. Peter Hirschfeld (University of Florida, Gainesville)
Pairing states in iron-based superconductors: variations on the s+/- theme
Seminar TPII/III EPVI, Raum: S-288
Rosa Balducci (Theoretische Physik II)
Quasiklassischer Spintransport in inhomogenen Rashba-Systemen
Lehrstuhlseminar Theoretische Physik II, Raum: T-2003
Dr. Saikat Banerjee
Phonon-induced emergent charge density wave in cuprates

In this talk, I will discuss about our recent work on the emergence of incommensurate charge order in underdoped YBa2Cu3O6+x. We find that the lattice motions of the oxygen atoms, belonging to the CuO2planes of an YBCO unit cell, cooperate with the correlated electrons in delicate fashion to trigger a lattice instability which qualitatively agrees with the experimental observations. We show that the specific structure of the electron-lattice coupling plays an important role to select an uni-axial wave-vector for the corresponding charge modulation. As a consequence, we further observe that the cooperating phonons frequency drops in order to achieve the charge order transition.

Related references:
[1] R. Comin et al. Science 343, 390 (2014)
[2] Cuk et al., Phys. Rev. Lett. 93, 117003 (2004)
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
Lehrstuhlseminar Theoretische Physik III, Raum: S-439