arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0712.0893cond-mat.supr-con
收藏

偏压交流驱动约瑟夫森结中的反常输运:负电导

Anomalous transport in biased ac-driven Josephson junctions: Negative conductances

M. Kostur, L. Machura, P. Talkner, P. Hanggi, J. Luczka

摘要:

本文研究了受驱动、电容并联和反向并联的约瑟夫森结中的经典反常电输运。新的运输现象被确定在混乱的制度时,结受到两个,一个时间周期性(交流)和一个恒定的,偏置(直流)电流。结上电压对直流电流的依赖性表现出异常输运特性的丰富多样性:特别地,取决于所选择的参数状态,我们可以识别零直流偏置附近的所谓的绝对负电导、负微分电导的发生,以及在越过零电导之后,在远离零直流偏置的非平衡响应区出现负非线性电导。

英文摘要:

We investigate classical anomalous electrical transport in a driven, resistively and capacitively shunted Josephson junction device. Novel transport phenomena are identified in chaotic regimes when the junction is subjected to both, a time periodic (ac) and a constant, biasing (dc) current. The dependence of the voltage across the junction on the dc-current exhibits a rich diversity of anomalous transport characteristics: In particular, depending on the chosen parameter regime we can identify so termed absolute negative conductance around zero dc-bias, the occurrence of negative differential conductance and, after crossing a zero conductance, the emergence of a negative nonlinear conductance in the non-equilibrium response regime remote from zero dc-bias.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑