Quantum phase transitions in frustrated ferro- and ferrimagnets

We discuss the ground state of the one-dimensional frustrated quantum Heisenberg ferrimagnet. In the limit of weak frustration the ground state has macroscopic total spin and exhibits magnetic long-range order. In the opposite limit of strong frustration the ground state is a singlet ( S=0). We find...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 281; pp. 845 - 847
Main Authors Richter, J, Schollwöck, U, Ivanov, N.B
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2000
Subjects
Quantum phase transitions
Spin chains
Spin frustration
Spin chains
Quantum phase transitions
Spin frustration
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Summary:We discuss the ground state of the one-dimensional frustrated quantum Heisenberg ferrimagnet. In the limit of weak frustration the ground state has macroscopic total spin and exhibits magnetic long-range order. In the opposite limit of strong frustration the ground state is a singlet ( S=0). We find indications that this transition to a singlet state is of first order. We compare the ferrimagnet with the corresponding ferromagnet.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(99)00783-8