期刊
PHYSICAL REVIEW LETTERS
卷 99, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.99.197001
关键词
-
Time-resolved photoelectron spectroscopy is employed to study the dynamics of photoexcited electrons in optimally doped Bi2Sr2CaCu2O8+delta (Bi-2212). Hot electrons thermalize in less than 50 fs and dissipate their energy on two distinct time scales (110 fs and 2 ps). These are attributed to the generation and subsequent decay of nonequilibrium phonons, respectively. We conclude that 20% of the total lattice modes dominate the coupling strength and estimate the second momentum of the Eliashberg coupling function lambda Omega(2)(0)=360 +/- 30 meV(2). For the typical phonon energy of copper-oxygen bonds (Omega(0)similar or equal to 40-70 meV), this results in an average electron-phonon coupling lambda < 0.25.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据