Speaker
Description
The cuprate superconductor La2-xBaxCuO4 (x=0.125) is a striking example of intertwined electronic orders, where 3D superconductivity is anomalously suppressed, allowing spin and charge stripe order to develop, in a manner consistent with the emergence of a pair-density-wave state.
Understanding this interplay remains a key challenge, highlighting the necessity of external tuning for deeper insight. While in-plane uniaxial stress enhances SC and suppresses stripe order, the effects of c-axis compression remains largely unexplored. Here, we use μSR and AC susceptibility with an in situ piezoelectric stress device to investigate the spin-stripe order and superconductivity in LBCO-0.115 under c-axis compression. The measurements reveal a gradual suppression of the SC transition temperature (Tc) with increasing c-axis stress, in stark contrast to the strong enhancement observed under in-plane stress. We further show that while in-plane (30-degrees to stripe) stress rapidly reduces both the magnetic volume fraction (Vm) and the spin-stripe ordering (Tso), c-axis compression has no effect, with Vm and Tso exhibiting almost stable behavior up to the highest applied stress. These findings reveal a pronounced anisotropy in the stress response, which will help advance the understanding of the microscopic mechanisms linking stripe order and superconductivity in cuprates.
- Z. Guguchia et al., Proc. Natl. Acad. Sci. 121, e2303423120 (2024)
- S.S. Islam et al., arXiv:2503.09236 (2025)
| shams.islam@psi.ch | |
| Supervisors Name | H. Luetkens, and Z. Guguchia |
| Supervisors Email | hubertus.luetkens@psi.ch, and zurab.guguchia@psi.ch |
| Did you request an Invitation Letter for a Visitors Visa Application | Yes |
