Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-09-02
J. Phys. Condens. Matter 10 (1998) 10011
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 2 figures, to be published in J. Phys. Condens. Matter
Scientific paper
10.1088/0953-8984/10/44/009
Doped antiferromagnets, described by a t-t'-J model and a suitable 1/N expansion, exhibit a metallic phase-modulated antiferromagnetic ground state close to half-filling. Here we demonstrate that the energy of latter state is an even periodic function of the external magnetic flux threading the square lattice in an Aharonov-Bohm geometry. The period is equal to the flux quantum $\Phi_{0}=2\pi\hbar c/q$ entering the Peierls phase factor of the hopping matrix elements. Thus flux quantization and a concomitant finite value of superfluid weight D_s occur along with metallic antiferromagnetism. We argue that in the context of the present effective model, whereby carriers are treated as hard-core bosons, the charge q in the associated flux quantum might be set equal to 2e. Finally, the superconducting transition temperature T_c is related to D_s linearly, in accordance to the generic Kosterlitz-Thouless type of transition in a two-dimensional system, signaling the coherence of the phase fluctuations of the condensate. The calculated dependence of T_c on hole concentration is qualitatively similar to that observed in the high-temperature superconducting cuprates.
No associations
LandOfFree
Flux quantization and superfluid weight in doped antiferromagnets 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 Flux quantization and superfluid weight in doped antiferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flux quantization and superfluid weight in doped antiferromagnets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-263626