All-optical injection of charge, spin, and valley currents in monolayer transition-metal dichalcogenides

被引:29
作者
Muniz, Rodrigo A. [1 ]
Sipe, J. E.
机构
[1] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
COHERENT CONTROL;
D O I
10.1103/PhysRevB.91.085404
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Monolayer transition-metal dichalcogenides have recently become a playground for spintronics and valleytronics research. Their low-energy spectrum can be described by Dirac cones on the corners of Brillouin zone, but the physical properties are richer than those of graphene since the spin degeneracy is lifted and the optical selection rules are valley dependent. This has been exploited for the optical injection of spin-and valley-polarized currents by the application of static electric fields. In this paper we consider an all-optical method for the injection of charge-, spin-, and valley-polarized currents. The presence of both a fundamental optical field and its second harmonic can lead to the injection of currents due to a nonlinear effect involving the quantum interference between one-and two-photon absorption processes. We analyze how the injected quantities can be controlled through the parameters of the incident light fields, allowing capabilities of control beyond those achieved with static fields, and discuss the conditions for experimental verification of our results.
引用
收藏
页数:9
相关论文
共 29 条
  • [1] Excitonic effects on the two-color coherent control of interband transitions in bulk semiconductors
    Bhat, RDR
    Sipe, JE
    [J]. PHYSICAL REVIEW B, 2005, 72 (07)
  • [2] Progress, Challenges, and Opportunities in Two-Dimensional Materials Beyond Graphene
    Butler, Sheneve Z.
    Hollen, Shawna M.
    Cao, Linyou
    Cui, Yi
    Gupta, Jay A.
    Gutierrez, Humberto R.
    Heinz, Tony F.
    Hong, Seung Sae
    Huang, Jiaxing
    Ismach, Ariel F.
    Johnston-Halperin, Ezekiel
    Kuno, Masaru
    Plashnitsa, Vladimir V.
    Robinson, Richard D.
    Ruoff, Rodney S.
    Salahuddin, Sayeef
    Shan, Jie
    Shi, Li
    Spencer, Michael G.
    Terrones, Mauricio
    Windl, Wolfgang
    Goldberger, Joshua E.
    [J]. ACS NANO, 2013, 7 (04) : 2898 - 2926
  • [3] Jones AM, 2013, NAT NANOTECHNOL, V8, P634, DOI [10.1038/NNANO.2013.151, 10.1038/nnano.2013.151]
  • [4] Second harmonic microscopy of monolayer MoS2
    Kumar, Nardeep
    Najmaei, Sina
    Cui, Qiannan
    Ceballos, Frank
    Ajayan, Pulickel M.
    Lou, Jun
    Zhao, Hui
    [J]. PHYSICAL REVIEW B, 2013, 87 (16)
  • [5] Unconventional Quantum Hall Effect and Tunable Spin Hall Effect in Dirac Materials: Application to an Isolated MoS2 Trilayer
    Li, Xiao
    Zhang, Fan
    Niu, Qian
    [J]. PHYSICAL REVIEW LETTERS, 2013, 110 (06)
  • [6] Longitudinal and spin-valley Hall optical conductivity in single layer MoS2
    Li, Zhou
    Carbotte, J. P.
    [J]. PHYSICAL REVIEW B, 2012, 86 (20)
  • [7] Mak Kin Fai, 2012, NATURE NANOTECHNOL, V7, P494
  • [8] Observation of intense second harmonic generation from MoS2 atomic crystals
    Malard, Leandro M.
    Alencar, Thonimar V.
    Barboza, Ana Paula M.
    Mak, Kin Fai
    de Paula, Ana M.
    [J]. PHYSICAL REVIEW B, 2013, 87 (20)
  • [9] Coherent control of optical injection of spin and currents in topological insulators
    Muniz, Rodrigo A.
    Sipe, J. E.
    [J]. PHYSICAL REVIEW B, 2014, 89 (20):
  • [10] Optical Spectrum of MoS2: Many-Body Effects and Diversity of Exciton States
    Qiu, Diana Y.
    da Jornada, Felipe H.
    Louie, Steven G.
    [J]. PHYSICAL REVIEW LETTERS, 2013, 111 (21)