Phonon assisted multimagnon optical absorption and long lived two-magnon states in undoped lamellar copper oxides.
Phonon assisted multimagnon optical absorption and long lived two-magnon states in undoped lamellar copper oxides.
复制标题
声子辅助多磁振子光学吸收和未掺杂层状铜氧化物中长寿命的双磁振子态。
DOI：
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发表时间：
1995
影响因子：
8.6
通讯作者：
Sawatzky
中科院分区：
文献类型：
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作者：
Lorenzana;Sawatzky
利用相互作用自旋波理论计算了铜超导体母绝缘化合物声子辅助下多磁子红外吸收的有效电荷和双磁子吸收的光谱。最近测量的中红外波段[Perkins等]。理论物理。启。{f 71} 1621(1993)]被解释为涉及一个声子加一个双磁振子虚拟束缚态，以及一个声子加更高的多磁振子吸收过程。当磁振子对的总动量接近$(pi,0)$时，虚束缚态由窄共振组成。
We calculate the effective charge for multimagnon infrared (IR) absorption assisted by phonons in the parent insulating compounds of cuprate superconductors and the spectra for two-magnon absorption using interacting spin-wave theory. Recent measured bands in the mid IR [Perkins et al. Phys. Rev. Lett. {f 71} 1621 (1993)] are interpreted as involving one phonon plus a two-magnon virtual bound state, and one phonon plus higher multimagnon absorption processes. The virtual bound state consists of a narrow resonance occurring when the magnon pair has total momentum close to $(pi,0)$.