Institute for Theoretical Solid State Physics, IFW Dresden, D-01069 Dresden, Germany.
Institute for Theoretical Solid State Physics, IFW Dresden, D-01069 Dresden, Germany and Department of Physics, TU Dresden, D-01062 Dresden, Germany.
Phys Rev Lett. 2013 Mar 15;110(11):117005. doi: 10.1103/PhysRevLett.110.117005. Epub 2013 Mar 14.
The capability to probe the dispersion of elementary spin, charge, orbital, and lattice excitations has positioned resonant inelastic x-ray scattering (RIXS) at the forefront of photon science. Here we develop the scattering theory for RIXS on superconductors, calculating its momentum-dependent scattering amplitude. Considering superconductors with different pairing symmetries, we show that the low-energy scattering is strongly affected by the superconducting gap and coherence factors. This establishes RIXS as a tool to disentangle pairing symmetries and to probe the elementary excitations of unconventional superconductors.
探测基本自旋、电荷、轨道和晶格激发的分散能力使共振非弹性 X 射线散射（RIXS）成为光子科学的前沿。在这里，我们为超导材料的 RIXS 发展了散射理论，计算了其动量相关的散射振幅。考虑到具有不同配对对称性的超导体，我们表明，低能散射强烈受到超导能隙和相干因子的影响。这使得 RIXS 成为一种工具，可以用来分辨配对对称性并探测非常规超导体的基本激发。
