Cuprate High-Temperature Superconductors – How to Get Back to the Future with Phonons
- Date
- Oct 7, 2015
- Time
- 2:00 PM - 4:00 PM
- Speaker
- Dr. Dennis M. Newns
- Affiliation
- IBM T. J. Watson Research Center, New York
- Language
- en
- Main Topic
- Chemie
- Other Topics
- Chemie
- Host
- Prof. Dr. C. Felser, Prof. J. Grin
- Description
- The mechanism of High Temperature Superconductivity (HTS) has been controversial since its discovery. Recent experiments using resonant X-ray and STM techniques provide evidence that there is a Charge Density Wave (CDW) present, supporting a pairing mechanism based on electron-phonon coupling. We show that the famous Pseudogap can be linked to the CDW and to the High Temperature Superconducting phenomenon. Our model, recalling the widely observed oxygen instabilities in these perovskite materials, is based on anharmonic coupling of electrons to anharmonic oxygen vibrations [1], parametrized by ab initio calculations. On this basis we are able to explain the phase diagram, including superconductivity, and other properties of the HTS.
- Links
Last modified: Oct 5, 2015, 9:51:30 AM
Location
Max-Planck-Institut für Chemische Physik fester Stoffe (Seminarraum 1+2, Nöthnitzer Straße 40, 01187 Dresden)Nöthnitzer Straße4001187Dresden
- MPI-CPfS
- Homepage
- http://www.cpfs.mpg.de/
Organizer
Max-Planck-Institut für Chemische Physik fester StoffeNöthnitzer Straße4001187Dresden
- MPI-CPfS
- Homepage
- http://www.cpfs.mpg.de/
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