Competing orders in high-T_c superconductors

Details Competing orders in high-T_c superconductors Competing orders in high-T_c superconductors

2002-08-03

arxiv.org/abs/cond-mat/0208061v2

Physics

Condensed Matter

Superconductivity

13 pages, 1 figure

Scientific paper

Within a (2+1)-dimensional U(1) gauge field theory, after calculating the Dyson-Schwinger equation for fermion self-energy we find that chiral symmetry breaking (CSB) occurs if the gauge boson has a very small mass but is suppressed when the mass is larger than a critical value. In the CSB phase, the fermion acquires a dynamically generated mass, which leads to antiferromagnetic (AF) long-range order. Since in the superconducting (SC) state the gauge boson acquires a finite mass via Anderson-Higgs mechanism, we obtain a field theoretical description of the competition between the AF order and the SC order. As a compromise of this competition, there is a coexistence of these two orders in the bulk material of cuprate superconductors.

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