7 papers
High-temperature superconductivity in NdSrNiO membranes under pressure
Yonghun Lee, Mengnan Wang, Xin Wei +4
Lattice compression has emerged as a fundamental tuning parameter for nickelate superconductivity. Pressure acts as a trigger to induce superconductivity in bulk Ruddlesden-Popper…
Evolution of the Superfluid Density in Infinite-Layer Nickelates
Bai Yang Wang, Shannon P. Harvey, Kyuho Lee +6
Nickelate superconductors provide a valuable new platform for the study of unconventional superconductivity that is complementary to the cuprates. One of the central puzzles about…
Optical conductivity signatures of strong correlations and multiband superconductivity in infinite-layer nickelates
Woo Jin Kim, Kyuho Lee, Eun Kyo Ko +6
Since the discovery of superconductivity in infinite-layer nickelates, there have been extensive efforts to unravel their electronic structure and pairing mechanism. In particular,…
Mind the Gap -- Imaging Buried Interfaces in Twisted Oxide Moirés
Harikrishnan KP, Xin Wei, Chia-Hao Lee +10
The ability to tune electronic structure in twisted stacks of two-dimensional (2D) materials has motivated the exploration of similar moiré physics with twisted oxide membranes. Du…
Microscopic mechanisms of flexoelectricity in oxide membranes
Harikrishnan KP, Varun Harbola, Jaehong Choi +9
Modern electromechanical actuators and sensors rely on the piezoelectric effect that linearly couples strain and electric polarization. However, this effect is restricted to materi…
Electronically Amplified Electron-Phonon Interaction and Metal-Insulator Transition in Perovskite Nickelates
Yong Zhong, Kyuho Lee, Regan Bhatta +10
The relative role of electron-electron and electron-lattice interactions in driving the metal-insulator transition in perovskite nickelates opens a rare window into the non-trivial…
Highly confined epsilon-near-zero- and surface-phonon polaritons in SrTiO3 membranes
Ruijuan Xu, Iris Crassee, Hans A. Bechtel +13
Recent theoretical studies have suggested that transition metal perovskite oxide membranes can enable surface phonon polaritons in the infrared range with low loss and much stronge…