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Lehrstuhlseminar Theoretische Physik III


8.5.2019 11:00, Raum: S-439
Prof. Dr. Dieter Vollhardt
What do we learn from the observation of an isosbestic point?
15.5.2019 10:45, Raum: S-439
M.Sc. Marc Alexander
Inhomogeneous quench on the Bethe lattice, part 2
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
22.5.2019 10:45, Raum: S-439
B.Sc. Patricia Mayer
Quantum dynamical phase transitions
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
29.5.2019 10:45, Raum: S-439
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)
12.6.2019 10:45, Raum: S-439
Dr. Andreas Östlin
Effective medium theories of disorder for realistic materials
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
19.6.2019 10:45, Raum: S-439
Dr. Corentin Morice
2D to 3D crossover in topological insulators
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
3.7.2019 10:45, Raum: S-439
Dominik Meidert
Floquet theory
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
10.7.2019 10:45, Raum: S-439
B.Sc. Farzad Schafighpur
Thema wird noch bekannt gegeben
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
17.7.2019 10:45, Raum: S-439
Prof. Dr. Vladimir Dobrosavljevic (National High Magnetic Field Laboratory, Tallahassee, FL, USA)
Thema wird noch bekannt gegeben
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)
24.7.2019 10:45, Raum: S-439
Prof. Dr. Aditi Mitra (New York University, USA)
Thema wird noch bekannt gegeben
(bitte geänderte Uhrzeit beachten, Beginn um 10:45)