Weichselbaumer Stefan, Zens Matthias, Zollitsch Christoph W, Brandt Martin S, Rotter Stefan, Gross Rudolf, Huebl Hans
Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany.
Physik-Department, Technische Universität München, 85748 Garching, Germany.
Phys Rev Lett. 2020 Sep 25;125(13):137701. doi: 10.1103/PhysRevLett.125.137701.
We report on a novel dynamical phenomenon in electron spin resonance experiments of phosphorus donors. When strongly coupling the paramagnetic ensemble to a superconducting lumped element resonator, the coherent exchange between these two subsystems leads to a train of periodic, self-stimulated echoes after a conventional Hahn echo pulse sequence. The presence of these multiecho signatures is explained using a simple model based on spins rotating on the Bloch sphere, backed up by numerical calculations using the inhomogeneous Tavis-Cummings Hamiltonian.
我们报道了磷施主电子自旋共振实验中的一种新型动力学现象。当将顺磁系综与超导集总元件谐振器强耦合时，这两个子系统之间的相干交换会在传统的哈恩回波脉冲序列之后产生一系列周期性的、自激发回波。使用基于在布洛赫球上旋转的自旋的简单模型来解释这些多回波特征的存在，并通过使用非均匀塔维斯 - 卡明斯哈密顿量的数值计算来支持这一解释。
