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Amplitude mode oscillations in pump-probe photoemission spectra from ad-wave superconductor
Physical Review B ( IF 3.7 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1103/physrevb.96.184518
B. Nosarzewski , B. Moritz , J. K. Freericks , A. F. Kemper , T. P. Devereaux

Recent developments in the techniques of ultrafast pump-probe photoemission have made possible the search for collective modes in strongly correlated systems out of equilibrium. Including inelastic scattering processes and a retarded interaction, we simulate time- and angle-resolved photoemission spectroscopy (trARPES) to study the amplitude mode of a d-wave superconductor, a collective mode excited through the nonlinear light-matter coupling to the pump pulse. We find that the amplitude mode oscillations of the d-wave order parameter occur in phase at a single frequency that is twice the quasi-steady-state maximum gap size after pumping. We comment on the necessary conditions for detecting the amplitude mode in trARPES experiments.

中文翻译:

ad-wave超导体的泵浦探针光发射光谱中的振幅模式振荡

超快泵浦探针光发射技术的最新发展使得在不平衡的强相关系统中寻找集体模式成为可能。包括非弹性散射过程和延迟相互作用,我们模拟了时间分辨和角度分辨光发射光谱(trARPES),以研究a的振幅模式。d-波超导体,一种通过非线性光物质耦合到泵浦脉冲而激发的集体模式。我们发现d波阶参数在泵浦后的准稳态最大间隙尺寸的两倍的单个频率处同相出现。我们评论了在trARPES实验中检测振幅模式的必要条件。
更新日期:2017-11-20
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