Experimental observables near a nematic quantum critical point in the pnictide and cuprate superconductors
Cenke Xu, Yang Qi, Subir Sachdev
TL;DR
This paper develops a detailed theoretical framework to predict experimental signatures such as specific heat, LDOS, and NMR relaxation rates near nematic quantum critical points in high-temperature superconductors like pnictides and cuprates.
Contribution
It provides the first comprehensive theoretical analysis of observable effects near nematic quantum criticality in these superconductors.
Findings
Predicted scaling behavior of specific heat near the transition
Calculated local density of states modifications
Estimated NMR relaxation rate changes
Abstract
The newly discovered high temperature superconductor SmFeAs(O1-xFx) shows a clear nematic transition where the square lattice of Fe ions has a rectangular distortion. Similar nematic ordering has also been observed in the cuprate superconductors. We provide a detailed theory of experimental observables near such a nematic transition: we calculate the scaling of specific heat, local density of states (LDOS) and NMR relaxation rate 1/T_1T.
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