Europhys. Lett.
Volume 73, Number 4, February 2006
Page(s) 581 - 586
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 13 January 2006
Europhys. Lett., 73 (4), pp. 581-586 (2006)
DOI: 10.1209/epl/i2005-10445-y

Peierls instability due to d-wave pairing and stripe pattern of order-parameter distribution in two dimensions

Shi-Jie Xiong and Zhi-Jie Qin

National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University - Nanjing 210093, PRC

received 17 June 2005; accepted in final form 4 January 2006
published online 13 January 2006

We show that Peierls instability leading to stripe patterns occurs in two-dimensional systems with nearest-neighbor attractive interaction which is commonly used as a model Hamiltonian for d-wave superconductors. By a self-consistent calculation of order parameters for finite systems, we find that besides the usual d-wave component, a small amount of spatially modulated component emerges. This component partially removes the zero-energy nodes of the d-wave pairing and then reduces the energy. The periodic patterns are directly related to the Fermi wave vectors near half-filling. The effects of shift from the half-filling and disorder on stripe patterns are investigated.

74.20.Rp - Pairing symmetries (other than s-wave).
74.25.Jb - Electronic structure.
74.72.-h - Cuprate superconductors (high-Tc and insulating parent compounds).

© EDP Sciences 2006