Phase diagram of AV3Sb5

Phase Diagram : \(AV_3Sb_5\)¶

The charge order(CDW) and Superconductivity compete for the same electronic Density of states at the Fermi level (Fermi level), the superconducting transition temperature is typically enhanced as charge order(CO) is suppressed and evolves more gradually beyond the full suppression of CO.

Temperature dependent phase diagram is studied through electrical transport measurements.

Resistivity Vs Temperature (\(p = 0.1 \ \text{to} \ 2.3 \ \text{GPa}\))¶

The superconducting temperature increases from 0.9K to 3.1K at 0.4GPa with low-pressure CO becomes indiscernible above \(p_{c1} = 0.5 GPa\). (Remark: The sudden dip in resistivity gives the \(T_c\))

There is an anomaly in the resistivity curve, and the strength of the anomaly reflects the size of the underlying electronic order parameter. In addition to the suppression of \(T_{CO}\), the magnitude of the LPCO is also reduced under pressure.

Resistivity	Zoomed

Resistivity Vs Temperature (\(p = 4.9 \ \text{to} \ 21.5 \ \text{GPa}\))¶

Critical temperature CDW( \(T_{CO}\))¶

The derivative of the resistivity in the pressure range(0.1 to 2.3 GPa) shows a dip around the point of anomaly. As can be seen from the Phase diagram, the CO becomes indiscernible after 0.4 GPa.

Charge order associated with \(T_{CO}\) disappears rapidly upon pressure tuning.