Abstract
We report that the nuclear spin-lattice relaxation rate divided by temperature, has a broad maximum around and ∼100 K in underdoped and overdoped single crystals of (Bi2212) with and 77.3 K, respectively, showing the normal-state spin-gap behavior. One result is that the steep decrease in the Cu Knight shift, has been observed below and ∼100 K, suggesting the normal-state pseudogap behavior in quasiparticle density of states (DOS), which is consistent with the pseudogap behavior below revealed on underdoped Bi2212 from studies of angle-resolved photoemission spectroscopy. We propose that the spin-gap behavior in has the same origin as the pseudogap in the quasiparticle DOS.
- Received 21 April 1998
DOI:https://doi.org/10.1103/PhysRevB.58.R5960
©1998 American Physical Society