Energy spectra of ABC-stacked trilayer graphene in magnetic and electric fields

Lin, Yi; Wang, Jei; Lu, Juwei; Lin, Chiun-Yan; Lin, Ming–Fa

doi:10.1039/c4ra10860d

Cited by 18 publications

(51 citation statements)

References 70 publications

(75 reference statements)

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“…The AAA stacking has three pairs of linear bands, 30 and the ABA one possesses two pairs of parabolic and one pair of linear energy bands. 32 This is in sharp contrast to the individual bands of the sub-systems. On the other hand, the ABC stacking exhibits one pair each of a partial flat, a sombrero-shaped and a parabolic band.…”

Section: Introductionmentioning

confidence: 86%

Magneto-optical properties of ABC-stacked trilayer graphene

Lin

et al. 2015

Phys. Chem. Chem. Phys.

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The generalized tight-binding model is developed to investigate the magneto-optical absorption spectra of ABC-stacked trilayer graphene. The absorption peaks can be classified into nine categories of inter-Landau-level optical excitations, including three intra-group and six inter-group ones. Most of them belong to the twin-peak structures because of the asymmetric Landau level spectrum. The threshold absorption peak alone comes from a certain excitation channel, and its frequency is associated with a specific interlayer atomic interaction. The Landau-level anticrossings cause extra absorption peaks. Moreover, a simple relationship between the absorption frequency and the field strength is absent. The magneto-optical properties of ABC-stacked trilayer graphene are totally different from those of AAA- and ABA-stacked ones, such as the number, intensity and frequency of absorption peaks.

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Section: Introductionmentioning

confidence: 86%

Magneto-optical properties of ABC-stacked trilayer graphene

Lin

et al. 2015

Phys. Chem. Chem. Phys.

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“…In short, for each pair of anticrossing LLs, the main modes differ by 6. In addition to the intragroup anticrossings of the LLs in the first group, the second group LLs also avoid crossing each other at smaller field strengths (B 0 < 5 T) due to the sombrero-shaped energy dispersions [6,38] shown in Fig. 7(b).…”

Section: The Zero-field Band Structure and Quantized Landau Levelsmentioning

confidence: 99%

“…Distinctly, the zero-field band structure of ABCstacked trilayer graphene exhibits three pairs of energy dispersions: linear cones, sombreroshaped bands, and parabolic bands [6,38]. Accordingly, the B 0 -dependent energy spectrum has both intergroup and intragroup LL anticrossings, in which the latter are arised from the sombrero-shaped energy bands.…”

Section: Introductionmentioning

confidence: 99%

“…It exhibits many unusual physical properties, e.g., a rich magnetic quantization [1][2][3][4][5][6][7][8], half-integer Hall effect [9][10][11][12][13][14][15][16], high Young's modulus [17][18][19][20][21], high Fermi velocity (10 6 m/s), and others. Graphene could play an important role in technological applications such as electric circuits [22,23], field-effect transistors [24,25], light-emitting diodes [26][27][28], solar cells [29][30][31][32], and durable touch screens [33,34].…”

Section: Introductionmentioning

confidence: 99%

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Configuration-enriched magneto-electronic spectra of AAB-stacked trilayer graphene

Lin

et al. 2015

Carbon

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We developed the generalized tight-binding model to study the magneto-electronic properties of AAB-stacked trilayer graphene. Three groups of Landau levels (LLs) are characterized by the dominating subenvelope function on distinct sublattices. Each LL group could be further divided into two sub-groups in which the wavefunctions are, respectively, localized at 2/6 (5/6) and 4/6 (1/6) of the total length of the enlarged unit cell. The unoccupied conduction and the occupied valence LLs in each subgroup behave similarly. For the first group, there exist certain important differences between the two sub-groups, including the LL energy spacings, quantum numbers, spatial distributions of the LL wavefunctions, and the field-dependent energy spectra.The LL crossings and anticrossings occur frequently in each sub-group during the variation of field strengths, which thus leads to the very complex energy spectra and the seriously distorted wavefunctions. Also, the density of states (DOS) exhibits rich symmetric peak structures. The predicted results could be directly examined by experimental measurements. The magnetic quantization is quite different among the AAB-, AAA-, ABA-, and ABC-stacked configurations.

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“…Under a magnetic field, the intergroup and intragroup excitation channels among wellbehaved LLs comprise the main part of the absorption spectrum [146,[174][175][176], in which the absorption peaks show a twin-peak structure because the LL energy spectrum is asymmetric about = E 0 F [175,176]. Moreover, it is interesting to study the quantization effects of any two constant energy loops in the sombrero-shaped structure, where the quantized energies of the LLs are proportional or inversely proportional to the magnetic field strength [126,146,147]. This leads to many anticrossings of intragroup LLs in the ABC stacking configuration.…”

Section: Introductionmentioning

confidence: 99%