Abstract
We report that the nuclear spin-lattice relaxation rate divided by temperature, ${1/T}_{1}T,$ has a broad maximum around ${T}^{*}\ensuremath{\sim}210\mathrm{K}$ and \ensuremath{\sim}100 K in underdoped and overdoped single crystals of ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ (Bi2212) with ${T}_{c}=79$ and 77.3 K, respectively, showing the normal-state spin-gap behavior. One result is that the steep decrease in the ${}^{63}$Cu Knight shift, $K(T),$ has been observed below ${T}_{K}^{*}\ensuremath{\sim}200\mathrm{K}$ and \ensuremath{\sim}100 K, suggesting the normal-state pseudogap behavior in quasiparticle density of states (DOS), which is consistent with the pseudogap behavior below ${T}_{\mathrm{ARPES}}^{*}\ensuremath{\sim}170\mathrm{K}$ revealed on underdoped Bi2212 from studies of angle-resolved photoemission spectroscopy. We propose that the spin-gap behavior in ${1/T}_{1}T$ has the same origin as the pseudogap in the quasiparticle DOS.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
