https://wahajayub.me/ Selected papers in topological photovoltaics, quantum geometry, noncentrosymmetric materials, Hopf phases, and mathematical condensed matter. en-us Sat, 29 Aug 2026 23:59:24 GMT http://arxiv.org/abs/2608.27064v1 http://arxiv.org/abs/2608.27064v1 Thu, 27 Aug 2026 00:00:00 GMT A cross-bar MoS2/Ta2NiSe5 heterostructure demonstrates large zero-bias BPV at an overlap interface whose symmetry breaking and electrostatic landscape are independently tunable. http://arxiv.org/abs/2608.26026v1 http://arxiv.org/abs/2608.26026v1 Wed, 26 Aug 2026 00:00:00 GMT Electron-spin-resonance-driven linear photogalvanic currents in graphene are explained by radiation-induced momentum alignment followed by skew scattering. http://arxiv.org/abs/2608.26869v1 http://arxiv.org/abs/2608.26869v1 Thu, 27 Aug 2026 00:00:00 GMT Double-ionic-gated bilayer graphene yields switchable room-temperature nonlinear Hall response through unusually strong inversion breaking, with diode-like THz responsivity. https://doi.org/10.1103/f659-cgsd https://doi.org/10.1103/f659-cgsd Wed, 26 Aug 2026 00:00:00 GMT Berry-curvature and quantum-metric dipoles generate nonlinear thermoelectric effects, including a quantized response that measures Weyl-point chirality. http://arxiv.org/abs/2608.26099v1 http://arxiv.org/abs/2608.26099v1 Wed, 26 Aug 2026 00:00:00 GMT Quarter-flux Harper-Hofstadter bands admit closed-form spectra and quantum geometric tensors, yielding an analytically characterized nearly ideal Chern band. http://arxiv.org/abs/2608.26245v1 http://arxiv.org/abs/2608.26245v1 Wed, 26 Aug 2026 00:00:00 GMT Quantum geometric nesting in topological moire flat bands produces an exact pair-density-wave ground state and a universal superfluid-stiffness relation.