Anomalously robust valley polarization and valley coherence in bilayer WS2

Proceedings of the National Academy of Sciences of the United States of America

Volumn 111, Issue 32, 2014, Pages 11606-11611

  Zhu, Bairen ^a   Zeng, Hualing ^b   Dai, Junfeng ^c   Gong, Zhirui ^a   Cui, Xiaodong ^a  

^a UNIVERSITY OF HONG KONG   (Hong Kong)

^b CHINESE UNIVERSITY OF HONG KONG   (Hong Kong)

^c SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY   (China)

Author keywords

Spin valley coupling; Valley quantum control; Valleytronics

Indexed keywords

ARTICLE; BILAYER MEMBRANE; CIRCULAR DICHROISM; DEPOLARIZATION; ELECTRIC CONDUCTIVITY; FIELD EFFECT TRANSISTOR; PHOTOLUMINESCENCE; PHYSICAL PARAMETERS; POLARIZATION; PRIORITY JOURNAL; ROBUST VALLEY POLARIZATION; ROOM TEMPERATURE; SEMICONDUCTOR; SOLID STATE; VALLEY COHERENCE;

EID: 84905972736     PISSN: 00278424     EISSN: 10916490     Source Type: Journal    
DOI: 10.1073/pnas.1406960111     Document Type: Article

References (27)

1. Mak KF, Lee C, Hone J, Shan J, Heinz TF (2010) Atomically thin MoS?: A new direct-gap semiconductor. Phys Rev Lett 105(13):136805
2. Splendiani A, et al. (2010) Emerging photoluminescence in monolayer MoS2. Nano Lett 10(4):1271-1275
3. Xiao D, Liu G-B, Feng W, Xu X, Yao W (2012) Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides. Phys Rev Lett 108(19): 196802
4. Cao T, et al. (2012) Valley-selective circular dichroism of monolayer molybdenum disulphide. Nat Commun 3:887
5. Mak KF, He K, Shan J, Heinz TF (2012) Control of valley polarization in monolayer MoS2 by optical helicity. Nat Nanotechnol 7(8):494-498
6. Zeng H, Dai J, Yao W, Xiao D, Cui X (2012) Valley polarization in MoS2 monolayers by optical pumping. Nat Nanotechnol 7(8):490-493
7. Zeng H, et al. (2013) Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides. Sci Rep 3:1608
8. Wu S, et al. (2013) Electrical tuning of valley magnetic moment through symmetry control in bilayer MoS2. Nat Phys 9(3):149-153
9. Gong Z, et al. (2013) Magnetoelectric effects and valley-controlled spin quantum gates in transition metal dichalcogenide bilayers. Nat Commun 4:2053
10. Kioseoglou G, et al. (2012) Valley polarization and intervalley scattering in monolayer MoS2. Appl Phys Lett 101(22):221907
11. Ross JS, et al. (2013) Electrical control of neutral and charged excitons in a monolayer semiconductor. Nat Commun 4:1474
12. Mak KF, et al. (2013) Tightly bound trions in monolayer MoS2. Nat Mater 12(3): 207-211
13. Jones AM, et al. (2014) Spin-layer locking effects in optical orientation of exciton spin in bilayer WSe2. Nat Phys 10(2):130-134
14. Miller DAB, et al. (1984) Band-edge electroabsorption in quantum well structures: The quantum-confined stark effect. Phys Rev Lett 53(22):2173-2176
15. Dyakonov MI, Perel VI (1971) Spin orientation of electrons associated with interband absorption of light in semiconductors. J Exp Theor Phys 33:1053
16. Yafet Y (1952) Calculation of the g factor of metallic sodium. Phys Rev 85(3):478-478
17. Bir GL, Aronov AG, Pikus GE (1975) Spin relaxation of electrons due to scattering by holes. J Exp Theor Phys 42:705-712
18. Maialle MZ, Sham LJ, de Andrada e Silva EA (1993) Exciton spin dynamics in quantum wells. Phys Rev B Condens Matter 47(23):15776-15788
19. Zeng H, et al. (2012) Low-frequency Raman modes and electronic excitations in atomically thin MoS2 films. Phys Rev B 86(24):241301
20. Cheiwchanchamnangij T, Lambrecht WRL (2012) Quasiparticle band structure calculation of monolayer, bilayer, and bulk MoS2. Phys Rev B 85(20):205302
21. Shi H, Pan H, Zhang Y-W, Yakobson BI (2013) Quasiparticle band structures and optical properties of strained monolayer MoS2 and WS2. Phys Rev B 87(15):155304
22. Yu T, WuMW(2014) Valley depolarization due to intervalley and intravalley electronhole exchange interactions in monolayer MoS2. Phys Rev B 89(20):205303
23. Song Y, Dery H (2013) Transport theory of monolayer transition-metal dichalcogenides through symmetry. Phys Rev Lett 111(2):026601
24. Jones AM, et al. (2013) Optical generation of excitonic valley coherence in monolayer WSe2. Nat Nanotechnol 8(9):634-638
25. Yuan H, et al. (2013) Zeeman-type spin splitting controlled by an electric field. Nat Phys 9(9):563-569
26. Kumar N, et al. (2013) Second harmonic microscopy of monolayer MoS2. Phys Rev B 87(16):161403
27. Li Y, et al. (2013) Probing symmetry properties of few-layer MoS2 and h-BN by optical second-harmonic generation. Nano Lett 13(7):3329-3333.