Fig. 5: Seebeck coefficient of the tail-to-tail domain wall. | npj Computational Materials

Fig. 5: Seebeck coefficient of the tail-to-tail domain wall.

From: Giant thermoelectric power factor in charged ferroelectric domain walls of GeTe with Van Hove singularities

Fig. 5

Calculated Seebeck coefficient for p-type bulk GeTe and 39° (11\(\bar{1}\)) tail-to-tail (T-T) domain walls (DWs) for various directions at 300 K. Experimental data for bulk GeTe from refs. 62,63 are shown by red squares and stars, respectively. The top x-axis shows the DW interface free charge density, while the bottom x-axis corresponds to the volume charge concentration for the DW separation of 5.6 nm. Black vertical line shows the intrinsic doping concentration of the T-T DW for this DW separation due to charge transfer between the head-to-head and T-T DWs.

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