Optical absorption of spin ladders

Article

关键词: EXCITATION SPECTRUM;    CHAINS;    DYNAMICS;    STATES;    S=1/2;   

DOI  :  10.1103/PhysRevB.61.14307

来源: SCIE

【 摘 要 】

We present a theory of phonon-assisted optical two-magnon absorption in two-leg spin ladders. Based on the strong intra-rung-coupling limit we show that collective excitations of total spin S = 0, 1, and 2 exist outside of the two-magnon continuum. It is demonstrated that the singlet collective state has a clear signature in the optical spectrum.

【 授权许可】

Free