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Abstract: We investigate rectification of a low-frequency ac bias in Y-junctions ofone-channel Luttinger liquid wires with repulsive electron interaction.Rectification emerges due to three scatterers in the wires. We find that it ispossible to achieve a higher rectification current in a Y-junction than in asingle wire with an asymmetric scatterer at the same interaction strength andvoltage bias. The rectification effect is the strongest in the absence of thetime-reversal symmetry. In that case, the maximal rectification current can becomparable with the total current $\sim e^2V-h$ even for low voltages, weakscatterers and modest interaction strength. In a certain range of low voltages,the rectification current can grow as the voltage decreases. This leads to abump in the $I$-$V$ curve.



Autor: Chenjie Wang, D. E. Feldman

Fuente: https://arxiv.org/







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