Does Checkerboard Indicate a Hidden Electronic Order in Pseudogap State?

Previous studies indicate the appearance of the checkerboard pattern in the pseudogap state of Bi2212 surrounding vortex cores or in strongly underdoped region. Scientists from Japan in collaboration with the United States have made a study to make clearer this situation and its relation with a hidden electronic order in the pseudogap. Existing of some [...]

What is the Origin of d-wave Gap in Nonsuperconducting Systems?

A group of scientists from United States have investigated the ground state of pesudogap by ARPES measurements of La2-xSrxCuO4, in x=1/8 concentration, where the superconductivity suppressed strongly and the system has static spin and charge orders. The main idea of this study is to clear the origin of pseudogap in HTSCs, which have been previously [...]

Is Phonon Softening Related to Stripes?

A group of scientists from Germany, France, Japan, and United States has recently reported some experimental evidences that relate the phonon softening of oxygen bond-stretching vibration mode in HTSCs to the stripe order. The basic idea of this study is that charge inhomogeneity with a periodic modulation (for example stripes) should affect interatomic Coulomb forces [...]

Two Distinct Fermi Momentum-Dependent Energy Gaps

Some scientists from United States, Japan, and Canada in collaboration with each other have discovered two different Fermi momentum-dependent gaps related to the superconducting state and pseudogap. They have measured the ARPES spectra of deeply underdoped Bi2Sr2Ca1-xYxCu2O8 crystals, with Tc of 30-50 K. Analyzing the data shows two distinct energy gaps with different characteristics:
1) [...]

What is the Origin and Consequences of Microscopic Inhomogeneity in HTSCs

It is surprisingly interesting that the quantities such as the integrated local density of states (LDOS), tunneling spectrum and superconducting gap which are homogeneous in the conventional BCS superconductors seem to be inhomogeneous on the nanoscale for the HTSCs. Some scientists of the United States and Tokyo University have discussed the details, origin and consequences [...]

Pair Formation in High Temperature Superconductors (HTSCs) on the Atomic Scale

 
The superconducting group at the Princeton University with collaboration of Japanese group has succeeded to measure the superconducting gap on the atomic scale of High-Tc Superconductor Bi2Sr2CaCu2O8+δ (undrdoped, UD, optimaldoped, OP, and overdoped, OV, samples) for different doping concentrations and temperatures. They have determined the gap value and estimate the temperature which the gap is [...]

Hello Everyone

Superconductivity’s weblog is a personal weblog in the filed of  High Temperature Superconductivity (Physics: Condensend matter). This weblog intends to summaries in one place some important and recent improvements and news in the filed of superconductivity, especially high temperature superconductors. In addition this weblog would like to create a virtual space to discuss about the most important challenges in this [...]