Spin-Phonon Coupling in High-Tc Copper Oxides
نویسنده
چکیده
Band calculations on HgBa2CuO4 and La(2−x)SrxCuO4 with phonon and spin-waves within the CuO planes show that partial gaps are created at various energies depending on wavelengths. Spin and phonon gaps appear at different energies when the modulations are along [1,1,0], while they are at the same energy for modulations along [1,0,0]. It is shown that the ability to form gaps and antiferromagnetic waves is correlated with the strength of the interaction parameter λs f for spin fluctuations. Many unusual properties of the high-TC oxides can be understood from spin-phonon coupling.
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