Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-05-28
Nature Physics 4, 408 - 414 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages + 2 figures
Scientific paper
10.1038/nphys910
BCS theory describes the formation of Cooper pairs and their instant "Bose condensation" into a superconducting state. Helium atoms are preformed bosons and, in addition to their condensed superfluid state, can also form a quantum solid, lacking phase-coherence. Here we show that the fate of Cooper pairs can be more varied than the BCS or helium paradigms. In copper-oxide d-wave superconductors (dSC) Cooper pairs are intrinsically non-local objects, with both center-of-mass and relative motions. As doping decreases, the center-of mass fluctuations force a correlated dSC into a state with enhanced diamagnetism and robust but short-ranged superconducting order. At extreme underdoping, the relative fluctuations take over and two pseudogaps -- ``small'' (charge) and ``large'' (spin) -- emerge naturally from the theory, as Cooper pairs ``disintegrate'' and charge ``detaches'' from spin-singlet bonds. The ensuing ground state(s) are governed by diagonal (mostly antiferromagnetic) rather than by superconducting (off-diagonal) correlations. The theory is used to account for several recent experiments and to draw general conclusions about the phase diagram.
No associations
LandOfFree
Emergence of Cooper pairs, d-wave duality and the phase diagram of cuprate superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Emergence of Cooper pairs, d-wave duality and the phase diagram of cuprate superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emergence of Cooper pairs, d-wave duality and the phase diagram of cuprate superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-447704