Three transport signals mark a common temperature in ZrTe₅ flakes
Increasing flake thickness from 42 to 89 nm shifted the characteristic temperature from about 200 to 160 K.
Zhijian Xie and colleagues compared longitudinal resistance, Hall response and magnetic-field-dependent transport in ZrTe₅ flakes. Three signals extracted from different measurements changed near the same temperature in each sample. SUSTech coauthors included Peipei Wang and Liyuan Zhang.
The crossover temperatures of the 42 and 89 nm flakes differed by about 40 K. The team proposed a temperature-driven topological transition as a possible common cause, giving future tests several observables to compare.