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LIFTING OF MULTIPHASE DEGENERACY BY QUANTUM FLUCTUATIONS

Abstract:

We study the effect of quantum fluctuations on the multiphase point of the Heisenberg model with first- and second-neighbor competing interactions and strong uniaxial spin anisotropy D. By studying the structure of perturbation theory we show that the multiphase degeneracy which exists for S= (i.e., for the axial next-nearest-neighbor Ising model) is lifted and that the effect of quantum fluctuations is to stabilize a sequence of phases of wavelength 4,6,8,.... This sequence is probably an in...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.52.6684

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Journal:
PHYSICAL REVIEW B
Volume:
52
Issue:
9
Pages:
6684-6705
Publication date:
1995-09-01
DOI:
EISSN:
1095-3795
ISSN:
0163-1829
URN:
uuid:82daa0ee-ae5c-4937-9e37-7fd74a162dc6
Source identifiers:
16465
Local pid:
pubs:16465
Language:
English

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