6 papers
Symmetries of electron interactions in Hubbard models of unconventional superconductors
Sergei Urazhdin, Yiou Zhang
We use symmetry arguments to show that the matrix elements of electron-electron interaction on a lattice reach extrema in states composed of wavevectors near high-symmetry points o…
The role of electron interactions in a failed insulator revealed by shot noise
Mateusz Szurek, Hanqiao Cheng, Zilu Pang +2
In materials known as failed insulators, electrical resistivity increases as temperature decreases, yet does not diverge - a phenomenon inconsistent with single-particle theories.…
Evidence for Bose liquid from anomalous shot noise in nanojunctions of bad metal beta-Ta
Yiou Zhang, Chendi Xie, John Bacsa +2
We report anomalous shot noise in nanojunctions of beta-tantalum, a ``bad" metal whose electronic properties are inconsistent with the Fermi liquid theory. Fano factors cluster aro…
Anomalous shot noise in a bad metal beta-tantalum
M. Szurek, H. Cheng, Z. Pang +3
We investigate the electronic shot noise produced by nanowires of -Ta, an archetypal ``bad" metal with resistivity near the Ioffe-Regel localization limit. The Fano factor chara…
Observation of Rashba Magnetism in Ultrathin Ferromagnet-Heavy Metal Bilayers
Sergei Ivanov, Yiou Zhang, Joshua Peacock +6
Both magnetism and spin-orbit coupling in systems with broken inversion symmetry lift the spin degeneracy of electronic bands, but the consequences of interplay between these mecha…
Shot noise in a metal close to Mott transition
Yiou Zhang, Shashi Pandey, Sergei Ivanov +2
SrIrO is a metallic complex oxide with unusual electronic and magnetic properties believed to originate from electron correlations due to its proximity to Mott metal-insulator…