Physics – Condensed Matter – Superconductivity
Scientific paper
2010-02-03
Phys. Rev. B 81, 224505 (2010)
Physics
Condensed Matter
Superconductivity
18 pages, 17 figures
Scientific paper
10.1103/PhysRevB.81.224505
We study the phase diagram of the Hubbard model in the limit where U, the onsite repulsive interaction, is much smaller than the bandwidth. We present an asymptotically exact expression for T$_c$, the superconducting transition temperature, in terms of the correlation functions of the non-interacting system which is valid for arbitrary densities so long as the interactions are sufficiently small. Our strategy for computing T$_c$ involves first integrating out all degrees of freedom having energy higher than an unphysical initial cutoff $\Omega_0$. Then, the renormalization group (RG) flows of the resulting effective action are computed and T$_c$ is obtained by determining the scale below which the RG flows in the Cooper channel diverge. We prove that T$_c$ is independent of $\Omega_0$. Using this method, we find a variety of unconventional superconducting ground states in two and three dimensional lattice systems and present explicit results for T$_c$ and pairing symmetries as a function of the electron concentration.
Kivelson Steven A.
Raghu Srinivas
Scalapino Douglas J.
No associations
LandOfFree
Superconductivity in the repulsive Hubbard model: an asymptotically exact weak-coupling solution 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 Superconductivity in the repulsive Hubbard model: an asymptotically exact weak-coupling solution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Superconductivity in the repulsive Hubbard model: an asymptotically exact weak-coupling solution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-600696