Ground-State Properties for Bilayer Kitaev Model: Dimer Expansion Study

Akihisa Koga; Hiroyuki Tomishige; Joji Nasu

doi:10.1007/s10948-018-4891-5

Ground-State Properties for Bilayer Kitaev Model: Dimer Expansion Study

Akihisa Koga, Hiroyuki Tomishige, Joji Nasu

SCI - Physics

Institute of Science Tokyo

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We study ground-state properties in the bilayer Kitaev model by means of the dimer expansion. The existence of parity symmetries in the system reduces the computational cost significantly. This allows us to expand the ground-state energy and interlayer spin-spin correlation up to the 30th order in the interdimer Kitaev coupling. The numerical calculations clarify that the dimer singlet state is indeed realized in the wide parameter region.

Original language	English
Pages (from-to)	1827-1830
Number of pages	4
Journal	Journal of Superconductivity and Novel Magnetism
Volume	32
Issue number	6
DOIs	https://doi.org/10.1007/s10948-018-4891-5
Publication status	Published - 2019 Jun 15

Keywords

Bilayer Kitaev model
Dimer expansion

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10.1007/s10948-018-4891-5

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title = "Ground-State Properties for Bilayer Kitaev Model: Dimer Expansion Study",

abstract = "We study ground-state properties in the bilayer Kitaev model by means of the dimer expansion. The existence of parity symmetries in the system reduces the computational cost significantly. This allows us to expand the ground-state energy and interlayer spin-spin correlation up to the 30th order in the interdimer Kitaev coupling. The numerical calculations clarify that the dimer singlet state is indeed realized in the wide parameter region.",

keywords = "Bilayer Kitaev model, Dimer expansion",

author = "Akihisa Koga and Hiroyuki Tomishige and Joji Nasu",

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T2 - Dimer Expansion Study

AU - Koga, Akihisa

AU - Tomishige, Hiroyuki

AU - Nasu, Joji

PY - 2019/6/15

Y1 - 2019/6/15

N2 - We study ground-state properties in the bilayer Kitaev model by means of the dimer expansion. The existence of parity symmetries in the system reduces the computational cost significantly. This allows us to expand the ground-state energy and interlayer spin-spin correlation up to the 30th order in the interdimer Kitaev coupling. The numerical calculations clarify that the dimer singlet state is indeed realized in the wide parameter region.

AB - We study ground-state properties in the bilayer Kitaev model by means of the dimer expansion. The existence of parity symmetries in the system reduces the computational cost significantly. This allows us to expand the ground-state energy and interlayer spin-spin correlation up to the 30th order in the interdimer Kitaev coupling. The numerical calculations clarify that the dimer singlet state is indeed realized in the wide parameter region.

KW - Bilayer Kitaev model

KW - Dimer expansion

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JF - Journal of Superconductivity and Novel Magnetism

IS - 6

ER -

Ground-State Properties for Bilayer Kitaev Model: Dimer Expansion Study

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Keywords

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