Aharonov-Bohm interference in topological insulator nanoribbons.

By H. Peng, K. Lai, Desheng Kong, S. Meister, Yulin Chen, Xiao-Liang Qi, Shoucheng Zhang, Zhi-xun Shen, Yi Cui. Nature Materials, 2009

754 citations recorded by the source corpus.

Topological insulators represent unusual phases of quantum matter with an insulating bulk gap and gapless edges or surface states. The two-dimensional topological insulator phase was predicted in HgTe quantum wells and confirmed by transport measurements. Recently, Bi(2)Se(3) and related materials have been proposed as three-dimensional topological insulators with a single Dirac cone on the surface, protected by time-reversal symmetry. The topological surface states have been observed by angle-resolved photoemission spectroscopy experiments. However, few transport measurements in this context have been reported, presumably owing to the predominance of bulk carriers from crystal defects or thermal excitations. Here we show unambiguous transport evidence of topological surface states through periodic quantum interference effects in layered single-crystalline Bi(2)Se(3) nanoribbons, which have larger surface-to-volume ratios than bulk materials and can therefore manifest surface effects. Pronounced Aharonov-Bohm oscillations in the magnetoresistance clearly demonstrate the coherent propagation of two-dimensional electrons around the perimeter of the nanoribbon surface, as expected from the topological nature of the surface states. The dominance of the primary h/e oscillation, where h is Planck's constant and e is the electron charge, and its temperature dependence demonstrate the robustness of these states. Our results suggest that topological insulator nanoribbons afford promising materials for future spintronic devices at room temperature.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry, Physical and Theoretical Chemistry

View Paper: https://www.semanticscholar.org/paper/83fa33368f9268ad693b08d5950248ba6adf0561

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In Atomic and Molecular Physics, and Optics

1. G. Soboń
2. Han Zhang
3. Ashvin Vishwanath
4. N. P. Armitage
5. E. Mele
6. Shuangchun Wen
7. Ebrahim Karimi
8. Daiming Tang

In Materials Chemistry

1. G. Soboń
2. Ashvin Vishwanath
3. N. P. Armitage
4. Han Zhang
5. Daiming Tang
6. Chujun Zhao
7. Shuangchun Wen
8. E. Mele

In Physical and Theoretical Chemistry

1. G. Soboń

Citations in the corpus

• Weyl and Dirac semimetals in three-dimensional solids (2017, background): “The 12 is interpreted as it is in the case of topological insulator nanoribbons (Peng et al., 2010) as indicative of a π Berry’s phase (Bardarson et al., 2010; Zhang and Vishwanath, 2010).”
• Controlled synthesis of single-crystal SnSe nanoplates (2015, background): “Other 2D layered materials such as hexagonal boron nitride (h-BN) [3, 9], V-VI topological insulators (TIs) [10-12] and transition metal dichalcogenides (TMDs) [4] have also received considerable attentions, owing to their fascinating electronic band structures and remarkably layer-dependent propert”