Spin- and valley-polarized transport in a monolayer of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>MoS</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

Krstajić, P. M.; Vasilopoulos, P.; Tahir, M.

doi:10.1103/physrevb.94.085413

Cited by 22 publications

(9 citation statements)

References 42 publications

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“…It should be noted that we use a constant relaxation time for the following calculations where the specific scattering events are not considered. Very recently, the intraband optical conductivity for ML-MoS 2 has also been calculated [50], and the evaluation of the relaxation time by impurity scattering had been discussed in Ref. [51].…”

Section: Optical Conductivitymentioning

confidence: 99%

Infrared to terahertz optical conductivity ofn-type andp-type monolayerMoS2in the presence of Rashba spin-orbit coupling

Xiao

Duppen

et al. 2016

Phys. Rev. B

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We investigate the effect of Rashba spin-orbit coupling (SOC) on the optoelectronic properties of nand p-type monolayer MoS 2. The optical conductivity is calculated within the Kubo formalism. We find that the spin-flip transitions enabled by the Rashba SOC result in a wide absorption window in the optical spectrum. Furthermore, we evaluate the effects of the polarization direction of the radiation, temperature, carrier density, and the strength of the Rashba spin-orbit parameter on the optical conductivity. We find that the position, width, and shape of the absorption peak or absorption window can be tuned by varying these parameters. This study shows that monolayer MoS 2 can be a promising tunable optical and optoelectronic material that is active in the infrared to terahertz spectral range.

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Section: Optical Conductivitymentioning

confidence: 99%

Infrared to terahertz optical conductivity ofn-type andp-type monolayerMoS2in the presence of Rashba spin-orbit coupling

Xiao

Duppen

et al. 2016

Phys. Rev. B

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“…He et al [28] investigated the magnetic properties of nonmetal atoms absorbed monolayer MoS 2 by first-principles calculations. The spin-and valley-dependent magneto-optical properties [29], the quantum magnetotransport [8,12,30], the spin-and valley-polarized transport [31], and the effect of doping and strain modulations on electron transport [32], as well as the thermal conductivity and phonon linewidths [33] have been investigated in this interesting system.…”

Section: Introductionmentioning

confidence: 99%

Magneto-optical transport properties of monolayer MoS2 on polar substrates

et al. 2017

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We theoretically study the magneto-optical transport properties of monolayer molybdenum disulfide (MoS 2 ) on polar substrates in the presence of a perpendicular magnetic field. The magneto-optical absorption coefficient (MOAC) is investigated as a function of the incident photon energy when carriers are scattered by three different types of phonons: the intrinsic MoS 2 acoustic, optical phonons, and the surface optical (SO) phonons induced by polar substrates. Among the substrates considered, the largest magnitude of MOAC and full-width at half maximum (FWHM) are observed for a SiO 2 substrate over the entire temperature and magnetic field range considered due to its strongest electron-SO phonon scattering, while an h-BN substrate displays the lowest one. The piezoelectric (PE) coupling to the transverse (TA) phonon is shown to dominate the MOAC and FWHM due to intrinsic acoustic phonon scattering. Meanwhile, these properties for intrinsic optical phonons are dominated by zero-order deformation potential (DP) couplings and the Fröhlich interaction. The dependence of the MOAC and FWHM on temperature, magnetic field, and the effective MoS 2 -substrate distance is also examined. The present results for monolayer MoS 2 are compared with those in conventional two-dimensional systems as well as in graphene. Our results show that SO phonons play a crucial role at high temperature depending on the substrates and have a non-negligible effect on the magneto-optical transport properties of monolayer MoS 2 , which could be further experimentally and theoretically investigated in the future.

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“…Besides, the spin-polarized current is easily controlled by the spin and valley Zeeman terms in this material. The spin-orbit interactions and spin and valley filtering have been also demonstrated to significantly affect the transport gap [14] and spin-and valley-Hall conductivities [15] in monolayer MoS 2 . Yuan et al [17] studied the dependence of electron transport on the spin and valley polarization in monolayer MoS 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Spintronics and valleytronics have been playing increasingly important roles and considered as the keys of the new period of the electronics technology [9]. The spin-and valleypolarized transport have been proved to be the most vital properties of the 2D materials and have been of significant interest and studied widely [14][15][16][17][18]. When studying the electron transport through the barriers in monolayer WSe 2 , Tahir et al [16] found that the spin splitting is essential to the valley-polarized transport.…”

Section: Introductionmentioning

confidence: 99%

Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

et al. 2020

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We study the optical absorption properties of silicene and germanene in the presence of the perpendicular magnetic and electric fields. Their low-energy Landau level (LL) spectra are controllable by an external electric field, where the spin-and valley-degeneracy of the LLs are strongly influenced by the electric and Zeeman fields. The electric field has removed spin-degeneracy at a given valley. Analytical expressions for the magneto-optical absorption coefficient (MOAC) are expressed in the presence of the interaction between carriers and random impurities and the intrinsic phonons including the spin and valley effects. The results evaluated for the topological insulator and valley-spin-polarized metal phases showed that when the electric field is included, the MOAC peaks are separated for opposite spin cases where the splitting in germanene is stronger than that in silicene. The peak's intensity caused by the carrier-photon-impurity scattering is the highest, the next is the carrier-photon scattering, while the carrier-photon-phonon scattering shows the lowest in both materials. Among the different phonon modes, the out-of-plane (ZA) mode in silicene dominates the others, being attributed to its buckled atomic structure, which does not exist in graphene. When the ZA mode is taken into account, the estimated resultant mobility from the full-width at half-maximum is significantly supported by the experimental result in silicene.

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Spin- and valley-polarized transport in a monolayer ofMoS2

Cited by 22 publications

References 42 publications

Infrared to terahertz optical conductivity ofn-type andp-type monolayerMoS2in the presence of Rashba spin-orbit coupling

Infrared to terahertz optical conductivity ofn-type andp-type monolayerMoS2in the presence of Rashba spin-orbit coupling

Magneto-optical transport properties of monolayer MoS2 on polar substrates

Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

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