The superconductivity of Sr2RuO4 under c-axis uniaxial stress

Fabian Jerzembeck*, Henrik S. Røising, Alexander Steppke, Helge Rosner, Dmitry A. Sokolov, Naoki Kikugawa, Thomas Scaffidi, Steven H. Simon, Andrew P. Mackenzie*, Clifford W. Hicks*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Applying in-plane uniaxial pressure to strongly correlated low-dimensional systems has been shown to tune the electronic structure dramatically. For example, the unconventional superconductor Sr2RuO4 can be tuned through a single Van Hove point, resulting in strong enhancement of both Tc and Hc2. Out-of-plane (c axis) uniaxial pressure is expected to tune the quasi-two-dimensional structure even more strongly, by pushing it towards two Van Hove points simultaneously. Here, we achieve a record uniaxial stress of 3.2 GPa along the c axis of Sr2RuO4. Hc2 increases, as expected for increasing density of states, but unexpectedly Tc falls. As a first attempt to explain this result, we present three-dimensional calculations in the weak interaction limit. We find that within the weak-coupling framework there is no single order parameter that can account for the contrasting effects of in-plane versus c-axis uniaxial stress, which makes this new result a strong constraint on theories of the superconductivity of Sr2RuO4.
Original languageEnglish
Article number4596
Number of pages11
JournalNature Communications
Early online date6 Aug 2022
Publication statusE-pub ahead of print - 6 Aug 2022


Dive into the research topics of 'The superconductivity of Sr2RuO4 under c-axis uniaxial stress'. Together they form a unique fingerprint.

Cite this