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Landau level diagram and the continuous rotational symmetry breaking in trilayer graphene

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arxiv 1802.05691 v3 pith:R2V4ARHG submitted 2018-02-15 cond-mat.mes-hall

Biswajit Datta , Hitesh Agarwal , Abhisek Samanta , Amulya Ratnakar , Kenji Watanabe , Takashi Taniguchi , Rajdeep Sensarma , Mandar M. Deshmukh This is my paper · ORCID
classification cond-mat.mes-hall
keywords aba-stackedfieldbreakingcontinuouselectricgraphenelandaurotational
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abstract

The sequence of the zeroth Landau levels (LLs) between filling factors $\nu$=-6 to 6 in ABA-stacked trilayer graphene (TLG) is unknown because it depends sensitively on the non-uniform charge distribution on the three layers of ABA-stacked TLG. Using the sensitivity of quantum Hall data on the electric field and magnetic field, in an ultraclean ABA-stacked TLG sample, we quantitatively estimate the non-uniformity of the electric field and determine the sequence of the zeroth LLs. We also observe anticrossings between some LLs differing by 3 in LL index, which result from the breaking of the continuous rotational to \textit{C}$_3$ symmetry by the trigonal warping.

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