Phase and Amplitude Fluctuation in High-Tc Superconductors: Formation of Gap Stripes Due to Lack of Electron-Hole Symmetry in Cuprate Oxides

摘要: Tc in high-temperature superconductors seems well described by coherence of overall phase the superconducting order parameter that is complex and fluctuates space time (thermal quantum fluctuation). Above T≥Tc pseudogap phase, where one has a nonzero pairing gap without global coherence. If were to define meanfield BCS temperature, Tc0, susceptibility diverges—the so-called Thouless instability—then we show this communication if system no electron-hole symmetry, obtain nonuniform stripes develops periodic amplitude modulation at T=Tc0. This suppresses q=o mode instability T=Tc0—i.e., instability.