  The physical properties of hole-doped cuprate high-temperature
superconductors are heavily influenced by an energy gap known as the pseudogap
whose origin remains a mystery second only to that of superconductivity itself.
A key question is whether the pseudogap closes at a temperature T*. The absence
of a specific heat anomaly, together with persistent entropy losses up to 300K,
have long suggested that the pseudogap does not vanish at T*. However, amid a
growing body of evidence from other techniques pointing to the contrary we
revisit this question. Here we investigate if, by adding a temperature
dependence to the pseudogap energy and quasiparticle lifetime in the
resonating-valence-bond spin-liquid model of Yang Rice and Zhang, we can close
the pseudogap quietly in the specific heat.
