How The Hall effect links superconductivity and quantum criticality in a strange metal
How The Hall effect links superconductivity and quantum criticality in a strange metal
Many of superconductors share the same anomalous charge transport properties and are thus collectively characterized as « strange metals. »
The amplitude of the strange metal contribution in the Hall effect as a function of composition x and temperature T, estimated from the field dependence of R_H. The white dotted line is a guide to the eye, emphasizing the boundary of the region where the strange metal R_H is independent of x. Above the line the strange metal Hall depends only on temperature and independent of composition x, below the line these contributions persist to zero temperature, suggesting a direct connection to the superconducting ground state. Credit: Nature Physics (2020). Hayes et al.
In a recent paper published in Nature Physics, Researchers at the University of California, Berkeley (UC Berkeley) and Los Alamos National Laboratory showed that in one of these materials, BaFe2(As1−xPx)2, superconductivity and quantum criticality are linked by what is known as the Hall effect.
In 2016, the team at UC Berkeley and Los Alamos National Lab observed an unusual scaling relationship between the magnetic field and temperature in superconductor BaFe2(As1−xPx)2.
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