These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Loss of classicality in alternating spin-12/spin-1 chain, in the presence of next-neighbor couplings and Dzyaloshinskii-Moriya interactions.
    Author: Lahiri A, Pati SK.
    Journal: J Phys Condens Matter; 2022 Feb 28; 34(17):. PubMed ID: 35021160.
    Abstract:
    We have considered and alternating spin-12/spin-1 chain with nearest-neighbor (NN) (J1), next-nearest neighbor (NNN) (J2) antiferromagnetic (AFM) Heisenberg interactions along withz-component of the Dzyaloshinskii-Moriya (DM) (Dz) interaction. The Hamiltonian has been studied using (a) linear spin-wave theory and (b) density matrix renormalization group. The system had been reported earlier as a classical ferrimagnet only when NN exchange interactions are present. Both the AFM NNN interactions and DM interactions introduce strong quantum fluctuations and due to which all the signatures of ferrimagnetism vanishes. We find that the nonzeroJ2introduces strong quantum fluctuations in each of the spin sites due to which thez-components of both spin-1 and spin-1/2 sites average out to be zero. The ground state becomes a singlet. The presence ofJ1along withDzintroduces a short range order but develops long range order along theXYplane.J1along withJ2induces competing phases with structure factor showing sharp and wide peaks, at two different angles reflecting the spin spiral structure locally as well as in the underlying lattice. Interestingly, we find that theDzterm removes the local spin spiral structure inz-direction, while developing a spiral order in theXYplane.
    [Abstract] [Full Text] [Related] [New Search]