Thermoelectric Hall conductivity reaches a plateau in the extreme quantum limit
Once ZrTe₅ reached its lowest Landau level, the measured transverse thermoelectric conductivity levelled off as the field increased.
The researchers combined resistivity, thermopower and Nernst measurements on ZrTe₅ crystals to extract the transverse thermoelectric conductivity. Deep in the extreme quantum limit, it changed little as the magnetic field increased. The value of that plateau, however, rose approximately linearly with temperature.
The paper appeared in Nature Communications. Liyuan Zhang, Liang Fu and Xiaosong Wu jointly conceived the study and are its corresponding authors. The contribution statement also credits Zhang with measurements and data analysis.