Statistics of conductances and subleading corrections to scaling near the integer quantum Hall plateau transition

DOI DOI 機関リポジトリ (HANDLE) HANDLE Web Site ほか1件をすべて表示 一部だけ表示 被引用文献1件 参考文献45件 オープンアクセス

説明

We study the critical behavior near the integer quantum Hall plateau transition by focusing on the multifractal (MF) exponents X-q describing the scaling of the disorder-average moments of the point contact conductance T between two points of the sample, within the Chalker-Coddington network model. Past analytical work has related the exponents X-q to the MF exponents Delta(q) of the local density of states (LDOS). To verify this relation, we numerically determine the exponents X-q with high accuracy. We thereby provide, at the same time, independent numerical results for the MF exponents Delta(q) for the LDOS. The presence of subleading corrections to scaling makes such determination directly from scaling of the moments of T virtually impossible. We overcome this difficulty by using two recent advances. First, we construct pure scaling operators for the moments of T which have precisely the same leading scaling behavior, but no subleading contributions. Secondly, we take into account corrections to scaling from irrelevant (in the renormalization group sense) scaling fields by employing a numerical technique ("stability map") recently developed by us. We thereby numerically confirm the relation between the two sets of exponents, X-q (point contact conductances) and Delta(q) (LDOS), and also determine the leading irrelevant (corrections to scaling) exponent y as well as other subleading exponents. Our results suggest a way to access multifractality in an experimental setting. Copyright (C) EPLA, 2013

収録刊行物

  • Epl

    Epl 104 (2), 27014-, 2013-11-25

    Epl association, european physical society

被引用文献 (1)*注記

もっと見る

参考文献 (45)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ