Using NMR Techniques to find the Correlation of Spin Fluctuation Behavior to Superconductivity of the Iron Chalcogenide Fe1+eTe0.5Se0.5
Abstract
This proposal seeks HBCU/MI funding to conduct basic Physics research on one of the simplest high temperature superconductors, Fe1+eTe0.5Se0.5, at the University of the Incarnate Word. The proposed experiments will allow for the ability to collect variable temperature (50 K to 1.7 K) and variable field high-resolution spin lattice relaxation rate (1/T1) and Knight Shift (K) data on a series of carefully prepared Fe1+eTe0.5Se0.5 samples by using nuclear magnetic resonance (NMR) techniques. The spin lattice relaxation rate as a function of temperature will be analyzed to see if there is a coherence peak below Tc to determine if this a conventional BCS type of superconductor. The Knight Shift temperature dependence will explain the orbital pairing of the superconductor. Finally, the 1/(T1T) vs T relationship will determine if there are 2D spin fluctuations. The data to be collected will conclusively determine what type of superconductor Fe1+eTe0.5Se0.5 is and the state of the conduction electrons, leading to a greater understanding of the mechanism responsible for high Tc superconductivity.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 31, 2020
- Source ID
- W911NF2010279
Entities
People
- Rosa Cardenas
Organizations
- Army Contracting Command
- Office of the Secretary of Defense
- University of the Incarnate Word