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  1. 計算科学研究センター (Center for Computational Sciences)
  2. 小泉 裕康 (Koizumi Hiroyasu)
  1. コンテンツタイプ (Contents Type)
  2. 雑誌発表論文等 (Journal article, etc.)
  3. J~
  4. Journal of the Physical Society of Japan

Loop Current Excitations in Effectively Half-Filled Mott Insulators

http://hdl.handle.net/2241/00159149
cb7fd25c-79ca-4308-bc31-60a6a069a832
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JPSJ_77-3.pdf JPSJ_77-3 (706.6 kB)
item type Journal Article(1)
公開日 2019-12-09
タイトル
言語 en
タイトル Loop Current Excitations in Effectively Half-Filled Mott Insulators
言語
言語 eng
資源タイプ
タイプ journal article
著者 小泉, 裕康

× 小泉, 裕康

WEKO 204265
e-Rad 60240959
筑波大学研究者総覧 0000000777

小泉, 裕康

ja-Kana コイズミ, ヒロヤス

en KOIZUMI, Hiroyasu

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内容記述 We show that spin vortex excitations in a two-dimensional half-filled antiferromagnetic insulator are accompanied by loop currents; they are the collective flow of electrons generated by a fictitious magnetic field, where the field arises from a phase factor that ensures the single-valuedness of wave functions for electron hopping motion. We study effectively half-filled states of a U ≫ t Hubbard model in which all holes added to the exactly half-filled antiferromagnetic insulator become self-trapped polarons. Using the perturbation theory, we demonstrate that loop currents arise when spin vortices are created and partially retrieve the itineracy of electrons in the upper Hubbard band. We also perform mean-field calculations to gain qualitative insights on the loop current state using parameters appropriate for cuprate superconductors. It is shown that a collection of loop currents creates a large current flow region or a “river” of current. A calculated ARPES profile exhibits a Fermi arc feature seen in cuprates when an extended loop current region is present; thus, it is suggested that such a current region may be the origin of the Fermi arc. The elastic neutron scattering cross section profiles are also calculated and a splitting of peaks that resembles experimental results is obtained.
書誌情報 en : Journal of the Physical Society of Japan

巻 77, 号 3, p. 034712, 発行日 2008-03
ISSN
収録物識別子 0031-9015
書誌レコードID
収録物識別子 AA00704814
DOI
関連識別子
関連識別子 10.1143/JPSJ.77.034712
権利
権利情報 ©2008 The Physical Society of Japan
著者版フラグ
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出版者
出版者 The Physical Society of Japan
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