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  1. B100 理学部/理学研究科
  2. B100a 雑誌掲載論文
  3. 学術雑誌

Two-loop renormalization group theory for the quasi-one-dimensional Hubbard model at half filling

http://hdl.handle.net/2237/7151
http://hdl.handle.net/2237/7151
71285ecb-204b-4c35-be21-5665b1a3be39
名前 / ファイル ライセンス アクション
PhysRevB_74_155109.pdf PhysRevB_74_155109.pdf (581.3 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2006-11-30
タイトル
タイトル Two-loop renormalization group theory for the quasi-one-dimensional Hubbard model at half filling
言語 en
著者 Tsuchiizu, M.

× Tsuchiizu, M.

WEKO 14393

en Tsuchiizu, M.

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 Copyright: American Physical Society, All rights reserved.
抄録
内容記述 We derive two-loop renormalization group equations for the half filled one-dimensional Hubbard chains coupled by the interchain hopping. Our renormalization group scheme for the quasi-one-dimensional electron system is a natural extension of that for the purely one-dimensional systems in the sense that transversemomentum dependences are introduced in the g-ological coupling constants and we regard the transverse momentum as a patch index. We develop symmetry arguments for the particle-hole symmetric half filled Hubbard model and obtain constraints on the g-ological coupling constants by which resultant renormalization equations are given in a compact form. By solving the renormalization group equations numerically, we estimate the magnitude of excitation gaps and clarify that the charge gap is suppressed due to the interchain hopping but is always finite even for the relevant interchain hopping. To show the validity of the present analysis, we also apply this to the two-leg ladder system. By utilizing the field-theoretical Bosonization and Fermionization method, we derive low-energy effective theory and analyze the magnitude of all the excitation gaps in detail. It is shown that the low-energy excitations in the two-leg Hubbard ladder have SO(3)*SO(3)*U(1) symmetry when the interchain hopping exceeds the magnitude of the charge gap.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 The American Physical Society
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1103/PhysRevB.74.155109
ISSN
収録物識別子タイプ PISSN
収録物識別子 1098-0121
書誌情報 en : Physical Review B

巻 74, 号 15, p. 155109-155109, 発行日 2006-10-15
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/7151
識別子タイプ HDL
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