Universal linear in temperature resistivity from black hole superradiance

Understand

Observations across many families of unconventional materials motivative the search for robust mechanisms producing linear in temperature d.c.

• resistivity.
• BKT quantum phase transitions are commonplace in holographic descriptions of finite density matter, separating critical and ordered phases.
• We show that at a holographic BKT critical point, if the unstable operator is coupled to the current via irrelevant operators, then a linear contribution to the resistivity is universally obtained.