Structural distortions in cuprate materials give a natural origin for anisotropies in electron properties. We study a modified one-band t-J model in which we allow for different hoppings and antiferromagnetic couplings in the two spatial directions (t(x) not equal t(y) and J(x) not equal J(y)). Incommensurate peaks in the spin structure factor show up only in the presence of a lattice anisotropy, whereas charge correlations, indicating enhanced fluctuations at incommensurate wave vectors, are present but almost unaffected with respect to the isotropic case.
Stripes and spin incommensurabilities are favored by lattice anisotropies / Becca, Federico; Capriotti, L; Sorella, Sandro. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 87:16(2001), pp. 167005.1-167005.4. [10.1103/PhysRevLett.87.167005]
Stripes and spin incommensurabilities are favored by lattice anisotropies
Becca, Federico;Sorella, Sandro
2001-01-01
Abstract
Structural distortions in cuprate materials give a natural origin for anisotropies in electron properties. We study a modified one-band t-J model in which we allow for different hoppings and antiferromagnetic couplings in the two spatial directions (t(x) not equal t(y) and J(x) not equal J(y)). Incommensurate peaks in the spin structure factor show up only in the presence of a lattice anisotropy, whereas charge correlations, indicating enhanced fluctuations at incommensurate wave vectors, are present but almost unaffected with respect to the isotropic case.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
