Novel Vortex States and Phase Diagram in Multi-Component Superconductors

点击翻译按钮获取中文摘要

In multi-component superconductors, phase differences among order parameters can take nontrivial values other than 0 and π, which breaks time reversal symmetry, when inter-component interactions are repulsive. In this novel state, more than two coherence lengths diverge at the critical temperature, making the dichroism classification of superconductors based on the Ginzburg-Landau (GL) parameter invalid. As such, novel vortex states are expected. Moreover, a mutual phase oscillation among components (known as Leggett mode) takes a small energy and thus can exist stably as a collective mode.