High-field evidence for the Bloch-Gruneisen curve in the cuprates

A clear evidence for the Bloch-Gruneisen curve in the cuprates is obtained on the basis of recent resistive measurements in a transverse magnetic field $H=60T$. It is demonstrated that such magnetic field suppresses not only superconducting (SC), but also spin-density-wave (SDW) phase transition, preceding the SC one in the cuprates. This picture is consistent with the Fermi-liquid behavior of the electron system in the cuprates and thus with the $s$-wave BCS theory.