Photoemission study of iron-based superconductor

Abstract

The iron-based superconductivity (IBSC) is a great challenge in correlated system. Angle-resolved photoemission spectroscopy (ARPES) provides electronic structure of the IBSCs, the pairing strength, and the order parameter symmetry. Here, we briefly review the recent progress in IBSCs and focus on the results from ARPES. The ARPES study shows the electronic structure of "122", "111", "11", and "122 * " families of IBSCs. It has been agreed that the IBSCs are unconventional superconductors in strong coupling region. The order parameter symmetry basically follows s ± form with considerable out-of-plane contribution.

ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism

“…It is thus a tool of choice for investigating the SC gap and the electronic structure of materials that have a multiband FS like the Fe-based superconductors. A few reviews of ARPES results on Fe-based are available in the literature [4][5][6][7][8]. The current one focusses on SC gap measurements of the Fe-based superconductors and closely related topics.…”

Radial Power Ultrasonic Vibration Honing Friction Analysis

“…When the friction exceeds a certain limit value, friction flutter may be occurred. Currently the understandings of friction flutter causes and physics are consistent, but there is no literature to describe this chatter with proposing reasonable mathematical model [3].…”

Observation of selective surface element substitution in FeTe 0.5 Se 0.5 superconductor thin film exposed to ambient air by synchrotron radiation spectroscopy

“…Superconductivity in iron-chalcogenides has attracted a great deal of interest due to the high transition temperatures and the existence of antiferromagnetic order in the compounds. [1][2][3][4][5][6] Among them, the PbOtype tetragonal FeSe is regarded as an ideal material for investigating the underlying mechanism of superconductivity owing to the simple planar crystal structure and strong T c dependence on external conditions. [7,8] For bulk material, Te substitution in the Se sites of FeSe enhances T c up to 14 K at an optimized doping of 50% Te in the material.…”