2009 Fiscal Year Final Research Report
Fractional particles in anisotropic-two-dimensional quantum systems
| Project/Area Number |
20740206
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
KOHNO Masanori National Institute for Materials Science, 国際ナノアーキテクトニクス研究拠点, MANA研究者 (40370308)
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| Project Period (FY) |
2008 – 2009
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| Keywords | 強相関系 / スペクトル関数 / 厳密解 / 準粒子 |
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| Research Abstract |
We investigated how quasiparticles having fractional quantum numbers in one-dimensional chains change into those with integer quantum numbers in higher dimensions, by using a weak-interchain-coupling approach combined with exact solutions. We found that quasiparticles carrying fractional quantum numbers form bound states due to interchain processes. In terms of the resultant quasiparticles, anomalous dynamical features observed in a frustrated anisotropic-two-dimensional antiferromagnet in a magnetic field are quantitatively explained in a unified manner.
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