Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 38: Topological Superconductors

TT 38.5: Vortrag

Mittwoch, 18. März 2020, 12:15–12:30, HSZ 103

Strongly correlated superconductor with polytypic 3D Dirac pointsSergei Borisenko1, •Volodymyr Bezguba1,2, Alexander Fedorov1,3, Yevhen Kushnirenko1, Vladimir Voroshnin3, Mihai Sturza1, Saicharan Aswartham1, and Alexander Yaresko41IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany — 2Kyiv Academic University, 03142 Kyiv, Ukraine — 3Helmholtz-Zentrum Berlin fur Materialien und Energie — 4Max-Planck-institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany

Topological superconductors should be able to provide essential ingredients for quantum computing, but are very challenging to realize. Spin-orbit interaction in iron-based superconductors opens the energy gap between the p-states of pnictogen and d-states of iron very close to the Fermi level, and such p-states have been recently experimentally detected. Density functional theory predicts existence of topological surface states within this gap in FeTe1−xSex making it an attractive candidate material. Here we use synchrotron-based angle-resolved photoemission spectroscopy and band structure calculations to demonstrate that FeTe1−xSex (x=0.45) is a superconducting 3D Dirac semimetal hosting type-I and type-II Dirac points and that its electronic structure remains topologically trivial.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden