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Experimental evidence for direct insulator-quantum Hall transition in multi-layer graphene

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Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
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Chiashain Chuang, Li-Hung Lin, Nobuyuki Aoki, Takahiro Ouchi, Akram M. Mahjoub, Tak-Pong Woo, J. P. Bird, Yuichi Ochiai
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Shun-Tsung Lo, Chi-Te Liang

Mesoscale and Nanoscale Physics · Submitted 2 Nov 2013

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Combined with existing experimental results obtained in various material systems, our data obtained on graphene suggest that the direct I-QH transition is a universal effect in 2D.

how it is stated · hedged possibility 0.96 read the record →

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arXiv ID1311.0353 (version 1)
Pith IDTRXZUFWA, Pith's permanent record of this paper and its review
CitationAkram M. Mahjoub, Chiashain Chuang, Chi-Te Liang, J. P. Bird, Li-Hung Lin, Nobuyuki Aoki, Shun-Tsung Lo, Takahiro Ouchi, Tak-Pong Woo, Yuichi Ochiai. "Experimental evidence for direct insulator-quantum Hall transition in multi-layer graphene." arXiv:1311.0353 (2013). https://pith.science/paper/TRXZUFWA
Claim paper

The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,629 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.29 · human participants 0.01 · controlled comparison 0.16 · randomized assignment 0.01 · states quantitative result 0.98 · compares with prior results 0.92 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

We have performed magnetotransport measurements on a multi-layer graphene flake. At the crossing magnetic field Bc, an approximately temperature-independent point in the measured longitudinal resistivity, which is ascribed to the direct insulator-quantum Hall (I-QH) transition, is observed. By analyzing the amplitudes of the magnetoresistivity oscillations, we are able to measure the quantum mobility of our device. It is found that at the direct I-QH transition, the product of the quantum mobility and is about 0.37 which is considerably smaller than 1. In contrast, at Bc, the longitudinal resistivity is close to the Hall resistivity, i.e., the product of the classical mobility and the crossing field is about 1. Therefore our results suggest that different mobilities need to be introduced for the direct I-QH transition observed in multi-layered graphene. Combined with existing experimental results obtained in various material systems, our data obtained on graphene suggest that the direct I-QH transition is a universal effect in 2D.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 We have performed magnetotransport measurements on a multi-layer graphene flake. method 0.65 0.97 0.01 asserted 0.98
s1 At the crossing magnetic field Bc, an approximately temperature-independent point in the measured longitudinal resistivity, which is ascribed to the direct insulator-quantum Hall (I-QH) transition, is observed. result 0.99 0.95 0.33 asserted 0.97
s2 By analyzing the amplitudes of the magnetoresistivity oscillations, we are able to measure the quantum mobility of our device. method 0.94 0.96 0.03 asserted 1.00
s3 It is found that at the direct I-QH transition, the product of the quantum mobility and is about 0.37 which is considerably smaller than 1. result 1.00 0.96 0.16 asserted 1.00
s4 In contrast, at Bc, the longitudinal resistivity is close to the Hall resistivity, i.e., the product of the classical mobility and the crossing field is about 1. result 0.99 0.90 0.07 asserted 0.98
s5 Therefore our results suggest that different mobilities need to be introduced for the direct I-QH transition observed in multi-layered graphene. interpretation 1.00 0.81 0.51 hedged possibility 1.00
s6 Combined with existing experimental results obtained in various material systems, our data obtained on graphene suggest that the direct I-QH transition is a universal effect in 2D. interpretation 1.00 0.77 0.60 hedged possibility 0.96

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 1.00.

What was examined, and what was not

sources read
  • arXiv listing abstract v1
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
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  • P abstract
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  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

We have performed magnetotransport measurements on a multi-layer graphene flake. At the crossing magnetic field Bc, an approximately temperature-independent point in the measured longitudinal resistivity, which is ascribed to the direct insulator-quantum Hall (I-QH) transition, is observed. By analyzing the amplitudes of the magnetoresistivity oscillations, we are able to measure the quantum mobility of our device. It is found that at the direct I-QH transition, the product of the quantum mobility and is about 0.37 which is considerably smaller than 1. In contrast, at Bc, the longitudinal resistivity is close to the Hall resistivity, i.e., the product of the classical mobility and the crossing field is about 1. Therefore our results suggest that different mobilities need to be introduced for the direct I-QH transition observed in multi-layered graphene. Combined with existing experimental results obtained in various material systems, our data obtained on graphene suggest that the direct I-QH transition is a universal effect in 2D.

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