All articles tagged with #quantum metric
Scientists at UNIGE have discovered a hidden quantum geometry within materials that influences electron paths similarly to gravity bending light, opening new possibilities for advanced electronics and quantum technology. This finding, observed at the interface of specific oxides, challenges previous assumptions and could lead to breakthroughs in high-frequency electronics, superconductivity, and light-matter interactions.
Researchers have observed quantum metric-induced nonlinear transport in thin films of a topological antiferromagnet, MnBi2Te4. This includes nonlinear anomalous Hall effect (AHE) and diode-like nonreciprocal longitudinal response. The transverse and longitudinal conductivities reverse signs when reversing the antiferromagnetic order, diminish above the Néel temperature, and are insensitive to disorder scattering, confirming their origin in the band structure topology. The findings provide a pathway to probe the quantum metric through nonlinear transport and design magnetic nonlinear devices.