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arXiv 0709.0580cond-mat.supr-concond-mat.other
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高温超导体本征约瑟夫森结太赫兹辐射的计算机模拟

Computer Simulation on Terahertz Emission from Intrinsic Josephson Junctions of High-T_c Superconductors

Shizeng Lin, Xiao Hu, Masashi Tachiki

摘要:

通过数值求解耦合的非线性sine-Gordon方程组和麦克斯韦方程组组,研究了高$T_c$超导体$\rm{Bi_2Sr_2CaCu_2O_{8+δ}}$单晶在平行于$ab$面的静磁场和沿c轴方向的直流电流作用下的电磁和超导性质.在本征约瑟夫森结中,横向等离子体发生了频率在太赫兹范围内的腔共振。结果表明,电磁波可以从结向空间传播。由坡印廷矢量计算的发射能量约为$400\rm{W/cm^2}$。发射的频率以及能量可以通过电流和磁场几乎连续地调谐。

英文摘要:

Solving coupled nonlinear sine-Gordon equations and Maxwell equations numerically, we study the electromagnetic and superconducting properties of the single crystal of high-$T_c$ superconductor $\rm{Bi_2Sr_2CaCu_2O_{8+δ}}$ with a static magnetic field applied parallel to the $ab$-plane and a dc current fed in along the c-axis. Cavity resonances of transverse plasma occur in the intrinsic Josephson junctions with frequencies in terahertz regime. It is revealed that the electromagnetic wave can transmit from the junctions into space. The emitted energy counted by the Poynting vector is about $400\rm{W/cm^2}$. The frequency as well as the energy of emission can be tuned almost continuously by the current and magnetic field.

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。

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