Chiral spin fluctuations: Long versus short wavelength?

Ritchey, I.; Chandra, Premala; Coleman, Piers

doi:10.1103/physrevlett.64.2583

Cited by 8 publications

(1 citation statement)

References 4 publications

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“…13,14,16 Furthermore, for the S = 1/2 case, linear spin wave theory predicts a magnetically disordered phase in a small window around J 2 /J 1 = 1/8 between the noncollinear and collinear phases. 14,17,18 However, a disordered phase was not found in nonlinear spin wave theory, 16,19 nor in linear spin wave theory applied to finite systems. 19 A Schwinger boson study 20 going beyond mean field theory found a magnetically disordered region between the two ordered phases, but did not address its nature further.…”

Section: Introductionmentioning

confidence: 99%

Schwinger-boson mean-field study of the J1−J2 Heisenberg quantum antiferromagnet on the triangular lattice

Bauer

Fjærestad

2017

Phys. Rev. B

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We use Schwinger boson mean field theory (SBMFT) to study the ground state of the spin-S triangular-lattice Heisenberg model with nearest (J1) and next-nearest (J2) neighbor antiferromagnetic interactions. Previous work on the S = 1/2 model leads us to consider two spin liquid Ansätze, one symmetric and one nematic, which upon spinon condensation give magnetically ordered states with 120• order and collinear stripe order, respectively. The SBMFT contains the parameter κ, the expectation value of the number of bosons per site, which in the exact theory equals 2S. For κ = 1 there is a direct, first-order transition between the ordered states as J2/J1 increases. Motivated by arguments that in SBMFT, smaller κ may be more appropriate for describing the S = 1/2 case qualitatively, we find that in a κ window around 0.6, a region with the (gapped Z2) symmetric spin liquid opens up between the ordered states. As a consequence, the static structure factor has the same peak locations in the spin liquid as in the 120• ordered state, and the phase transitions into the 120• and collinear stripe ordered states are continuous and first-order, respectively.

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Section: Introductionmentioning

confidence: 99%

Schwinger-boson mean-field study of the J1−J2 Heisenberg quantum antiferromagnet on the triangular lattice

Bauer

Fjærestad

2017

Phys. Rev. B

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A search for doubly charged Higgs production in Z0 decays

et al. 1992

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A search for the decay of the Z 0 into doubly-charged Higgs bosons (H ) decaying to same-sign lepton pairs is presented using data collected with the OPAL detector at LEP, with an integrated luminosity of 6:8 p b 1 . F our-track nal states from prompt decays, and events with at least one highly ionizing track from long-lived H were sought. H are excluded in the mass range from zero to 45.6 GeV/c 2 and for a coupling constant range that extends down to zero.

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