Valley and band structure engineering of folded MoS 2 bilayers

Nature Nanotechnology

Volumn 9, Issue 10, 2014, Pages 825-829

  Jiang, Tao ^a   Liu, Hengrui ^a   Huang, Di ^a   Zhang, Shuai ^a   Li, Yingguo ^a   Gong, Xingao ^a,b   Shen, Yuen Ron ^a,c   Liu, Wei Tao ^a,b   Wu, Shiwei ^a,b  

^a FUDAN UNIVERSITY   (China)

^b Center for Advanced Studies in Science and Technology of Microstructures   (China)

^c UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

LAYERED SEMICONDUCTORS; MOLYBDENUM COMPOUNDS; NONLINEAR OPTICS; OPTICAL PROPERTIES;

ARTIFICIAL STRUCTURES; BAND STRUCTURE ENGINEERING; ELECTRONIC AND OPTICAL PROPERTIES; INTERLAYER COUPLING; RESEARCH ACTIVITIES; STRUCTURAL SYMMETRY; TRANSITION METAL DICHALCOGENIDES; TWO-DIMENSIONAL CRYSTALS;

TRANSITION METALS;

MOLYBDENUM; SULFIDE; TRANSITION ELEMENT;

ACCELERATION; ARTICLE; BILAYER MEMBRANE; ENGINEERING; PHOTOLUMINESCENCE; POLARIZATION; PRIORITY JOURNAL;

EID: 85027922492     PISSN: 17483387     EISSN: 17483395     Source Type: Journal    
DOI: 10.1038/nnano.2014.176     Document Type: Article

References (33)

1. Geim, A. K. & Grigorieva, I. V. Van der Waals heterostructures. Nature 499, 419-425 (2013).
2. Dean, C. R. et al. Hofstadter's butterfly and the fractal quantum Hall effect in moire superlattices. Nature 497, 598-602 (2013).
3. Ponomarenko, L. A. et al. Cloning of Dirac fermions in graphene superlattices. Nature 497, 594-597 (2013).
4. Hunt, B. et al. Massive Dirac fermions and Hofstadter butterfly in a Van der Waals heterostructure. Science 340, 1427-1430 (2013).
5. Li, G. et al. Observation of Van Hove singularities in twisted graphene layers. Nature Phys. 6, 109-113 (2010).
6. Kim, K. et al. Raman spectroscopy study of rotated double-layer graphene: misorientation-Angle dependence of electronic structure. Phys. Rev. Lett. 108, 246103 (2012).
7. Wang, Q. H. et al. Electronics and optoelectronics of two-dimensional transition metal dichalcogenides. Nature Nanotech. 7, 699-712 (2012).
8. Xiao, D., Liu, G-B., Feng, W., Xu, X. & Yao, W. Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides. Phys. Rev. Lett. 108, 196802 (2012).
9. Yao, W., Xiao, D. & Niu, Q. Valley-dependent optoelectronics from inversion symmetry breaking. Phys. Rev. B 77, 235406 (2008).
10. Splendiani, A. et al. Emerging photoluminescence in monolayer MoS2. Nano Lett. 10, 1271-1275 (2010).
11. Mak, K. F., Lee, C., Hone, J., Shan, J. & Heinz, T. F. Atomically thin MoS2: a new direct-gap semiconductor. Phys. Rev. Lett. 105, 136805 (2010).
12. Zhao, W. et al. Origin of indirect optical transitions in few-layer MoS2, WS2 and WSe2. Nano Lett. 13, 5627-5634 (2013).
13. Zhang, Y. et al. Direct observation of the transition from indirect to direct bandgap in atomically thin epitaxial MoSe2. Nature Nanotech. 9, 111-115 (2014).
14. Mak, K. F., He, K., Shan, J. & Heinz, T. F. Control of valley polarization in monolayer MoS2 by optical helicity. Nature Nanotech. 7, 494-498 (2012).
15. Zeng, H., Dai, J., Yao, W., Xiao, D. & Cui, X. Valley polarization in MoS2 monolayers by optical pumping. Nature Nanotech. 7, 490-493 (2012).
16. Cao, T. et al. Valley-selective circular dichroism of monolayer molybdenum disulphide. Nature Commun. 3, 887 (2012).
17. Gong, Z. et al. Magnetoelectric effects and valley-controlled spin quantum gates in transition metal dichalcogenide bilayers. Nature Commun. 4, 2053 (2013).
18. Jones, A. M. et al. Spin-layer locking effects in optical orientation of exciton spin in bilayer WSe2. Nature Phys. 10, 130-134 (2014).
19. Zhu, B., Zeng, H., Dai, J., Gong, Z. & Cui, X. Anomalous robust valley polarization and valley coherence in bilayer WS2. Preprint at http://arxiv.org/abs/1403.6224 (2014).
20. Wu, S. et al. Electrical tuning of valley magnetic moment through symmetry control in bilayer MoS2. Nature Phys. 9, 149-153 (2013).
21. He, K., Poole, C., Mak, K. F. & Shan, J. Experimental demonstration of continuous electronic structure tuning via strain in atomically thin MoS2. Nano Lett. 13, 2931-2936 (2013).
22. Gong, Y. et al. Band gap engineering and layer-by-layer mapping of seleniumdoped molybdenum disulfide. Nano Lett. 14, 442-449 (2014).
23. Mann, J. et al. 2-Dimensional transition metal dichalcogenides with tunable direct band gaps: MoS2(1-x)Se2x monolayers. Adv. Mater. 26, 1399-1404 (2014).
24. Molina-Sanchez, A. & Wirtz, L. Phonons in single-layer and few-layer MoS2 and WS2. Phys. Rev. B 84, 155413 (2011).
25. Shen, Y. R. The Principles of Nonlinear Optics 27 (Wiley, 2003).
26. Li, Y. et al. Probing symmetry properties of few-layer MoS2 and h-BN by optical second-harmonic generation. Nano Lett. 13, 3329-3333 (2013).
27. Kumar, N. et al. Second harmonic microscopy of monolayer MoS2. Phys. Rev. B 87, 161403(R) (2013).
28. Malard, L. M. et al. Observation of intense second harmonic generation from MoS2 atomic crystals. Phys. Rev. B 87, 207401(R) (2013).
29. Zeng, H. et al. Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides. Sci. Rep. 3, 1608 (2013).
30. Bistrizer, R. & MacDonald, A. H. Moire bands in twisted double-layer graphene. Proc. Natl Acad. Sci. USA 108, 12233-12237 (2011).
31. Sato, K. et al. Zone folding effect in Raman G-band intensity of twisted bilayer graphene. Phys. Rev. B 86, 125414 (2012).
32. Kim, K. et al. Multiply folded graphene. Phys. Rev. B 83, 235433 (2011).
33. Liu, W-T. & Shen, Y. R. Surface vibrational modes of a-quartz(0001) probed by sum-frequency spectroscopy. Phys. Rev. Lett. 101, 016101 (2008).