Recent important progresses in the filed of HTSCs
A group of scientists from the USA have measured the nuclear magnetic resonance (NMR) spectrum of optimally doped YBCO with ~60% 17O-enrichment (Tc=92.5 K) in the present of high magnetic fields (H0=13-37 T). This study gives some information about the electronic structure of HTSCs near the vortex cores, and helps to understand the unexpected developing [...]
Observed local density of states (LDOS) modulations in the tunneling spectroscopy of HTSCs has started extensive research for determining its origin and consequences: two important possibilities are creation of new electronic order in the pseudogap, or interference of electronic states. To make clearer this subject, a group of scientist from the USA, Japan an Canada [...]
Quantum fluctuations of electrons depending to its strength could create different kind of electronic order: solid, liquid, or liquid crystal such as nematic and smectic phases. A group of scientist from the United States has theoretically investigated these orders in the doped two dimensional (2D) antiferromagnet lattices, which is especially important to understand the various [...]
The experimental observations of magnetic induced electronic structure are completely different from the pure d-wave BCS models predictions, for example: the absence of zero bias conductance peak or four-fold symmetric of LDOS (local density of states), low energy quasiparticle states about some meV in a radius of 75 Å, etc. Theories considering strong electronic correlation [...]
Collaboration of the scientists from the United States and Japan has resulted in discovering an incommensurate local ordering in the pseudogap of HTSCs. They have investigated the scanning tunneling microscopy (STM) of the slightly underdoped single crystal of 0.6% Zn-doped Bi2212 (Tc=80 K, pseudogap energy ∆ps~35-40 meV at 100 K). The Fourier analysis of the [...]
