77Se NMR Investigation of the K(x)Fe(2-y)Se(2) High Tc Superconductor (Tc=33K)

TL;DR

This study uses 77Se NMR to explore the structural, magnetic, and superconducting characteristics of K(x)Fe(2-y)Se(2), a high-temperature superconductor with Tc=33K, comparing it to other FeSe and FeAs systems.

Contribution

It provides a detailed NMR analysis of K(x)Fe(2-y)Se(2), revealing insights into its properties and differences from related superconductors.

Findings

Identifies unique magnetic and structural features of K(x)Fe(2-y)Se(2)

Shows differences in NMR signatures compared to FeSe and FeAs-based superconductors

Correlates NMR results with superconducting transition temperature

Abstract

We report a comprehensive 77Se NMR study of the structural, magnetic, and superconducting properties of a single crystalline sample of the newly discovered FeSe-based high temperature superconductor K(x)Fe(2-y)Se(2) (Tc=33K) in a broad temperature range up to 290 K. We will compare our results with those reported for FeSe (Tc=9K) and FeAs-based high Tc systems.