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TT: Fachverband Tiefe Temperaturen

TT 83: Superconductivity: (General) Theory

TT 83.11: Talk

Thursday, March 15, 2018, 12:15–12:30, HFT-FT 101

Renormalization group studies of supeconducting ordering in nickelates — •Michael Klett¹, David Riegler¹, Gang Li², and Ronny Thomale¹ — ¹Institute for Theoretical Physics and Astrophysics, Julius-Maximilians University of Würzburg, 97074 Würzburg, German — ²School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

Since the discovery of high T_c superconductivity in the cuprates by Bednorz and Müller, materials bearing similarities to copper oxide compounds have merged as a contemporary research topic of high interest. Although nickelates share many similarities with the cuprates, they exhibit no superconducting phase down to lowest temperatures. In this talk we sketch a simple two-band DFT model of the nickelates and argue why, based on renormalization group calculations competing superconducting ordering propensities make the nickelates belong to the class of low T_c materials