Hidden order, collective excitations, and entropy loss in the heavy fermion superconductor URu2Si2

We have clarified the ‘hidden order’ of URu2Si2, and the spin density wave, and calculated the large entropy loss on Kondo channel transition to the one channel Kondo fixed point of the crystal. The three collective excitations, particularly the one discovered recently, have been either derived or explained. These and other findings, in excellent agreement with outstanding data, are of general applicability to the analogues of URu2Si2 including the nonstoichiometric cuprates. The results show the presence of multichannel Kondo effect in these crystals.