The ground state of XY chains with nearest and next-nearest neighbour interactions

Autor:	J. Marshall Thomsen
Rok vydání:	2012
Předmět:	symbols.namesake Condensed matter physics Heisenberg model Chemistry Magnetic order symbols Nearest neighbour Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Condensed Matter Physics Ground state Hamiltonian (quantum mechanics)
Zdroj:	Philosophical Magazine. 92:160-167
ISSN:	1478-6443 1478-6435
Popis:	The ground state of chains with antiferromagnetic XY interactions is examined by direct diagonalisation of the Hamiltonian. Attention is focussed on chains with nearest and next-nearest neighbour interactions. It is found that results for finite chains can be readily extrapolated to infinite chains. The dimerised ground state corresponds to a maximum in the energy per spin with respect to the next-nearest neighbour interaction parameter. An alternate normalisation scheme provides additional insight into how the ground state energy depends on the interaction parameters.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::566761b93cb48e3d1dab29aa990079fb https://doi.org/10.1080/14786435.2011.614644 Zobrazit plný text záznamu