Zeeman-Induced Valley-Sensitive Photocurrent in Monolayer 
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Zhang, Xiao-Xiao; Lai, You; Dohner, Emma R.; Moon, Seungbin; Taniguchi, Takashi; Watanabe, Kenji; Smirnov, Dmitry; Heinz, Tony F.

doi:10.1103/physrevlett.122.127401

Cited by 35 publications

(14 citation statements)

References 31 publications

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“…Figure 10(b) shows the schematic view of valley-sensitive photocurrent detection, where the variation of the photocurrent exhibits a comparable quasilinear increase with increasing magnetic field. This result reveals the intrinsic response of TMD under the out-of-plane magnetic field, which is related to the Zeeman effect [ 223 ].…”

Section: Optoelectronic Devicesmentioning

confidence: 97%

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Polarization-Dependent Optical Properties and Optoelectronic Devices of 2D Materials

Liang

Pan

2020

Research

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The development of optoelectronic devices requires breakthroughs in new material systems and novel device mechanisms, and the demand recently changes from the detection of signal intensity and responsivity to the exploration of sensitivity of polarized state information. Two-dimensional (2D) materials are a rich family exhibiting diverse physical and electronic properties for polarization device applications, including anisotropic materials, valleytronic materials, and other hybrid heterostructures. In this review, we first review the polarized-light-dependent physical mechanism in 2D materials, then present detailed descriptions in optical and optoelectronic properties, involving Raman shift, optical absorption, and light emission and functional optoelectronic devices. Finally, a comment is made on future developments and challenges. The plethora of 2D materials and their heterostructures offers the promise of polarization-dependent scientific discovery and optoelectronic device application.

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Section: Optoelectronic Devicesmentioning

confidence: 97%

Section: Figurementioning

confidence: 99%

Polarization-Dependent Optical Properties and Optoelectronic Devices of 2D Materials

Liang

Pan

2020

Research

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“…Furthermore, a valley-dependent contribution to the longitudinal photocurrent is observed in monolayer MoS 2 with an applied external magnetic field. The observed helicity-dependent current is attributed to an unbalanced transport of valley-polarized trions due to the opposite Zeeman shifts of the K and K′ valleys, and it may provide an alternative route to electronically read-out optically imprinted valley information [21].…”

Section: Valley Optoelectronics In Tmdsmentioning

confidence: 99%

“…In the monolayer limit, these prototypical TMDs are directgap semiconductors, whose optical properties are dominated by many-body exciton physics, even at room temperature [15,16]. Due to their strong spin-orbit coupling, monolayer TMDs inherently intertwine angular momentum, out-of-plane spin, and crystal momentum degrees of freedom, such that under polarized optical excitation directed spin and charge currents can emerge [17][18][19][20][21]. Directly after a pulsed photoexcitation, the presence of a large density of (photogenerated) charge carriers can alter the Coulomb screening in monolayer TMDs [22][23][24][25][26][27][28][29], such that both the quasi-particle band gap and the excitonic binding energies are renormalized on femtosecond time scales.…”

Section: Introductionmentioning

confidence: 99%

Light-field and spin-orbit-driven currents in van der Waals materials

et al. 2020

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AbstractThis review aims to provide an overview over recent developments of light-driven currents with a focus on their application to layered van der Waals materials. In topological and spin-orbit dominated van der Waals materials helicity-driven and light-field-driven currents are relevant for nanophotonic applications from ultrafast detectors to on-chip current generators. The photon helicity allows addressing chiral and non-trivial surface states in topological systems, but also the valley degree of freedom in two-dimensional van der Waals materials. The underlying spin-orbit interactions break the spatiotemporal electrodynamic symmetries, such that directed currents can emerge after an ultrafast laser excitation. Equally, the light-field of few-cycle optical pulses can coherently drive the transport of charge carriers with sub-cycle precision by generating strong and directed electric fields on the atomic scale. Ultrafast light-driven currents may open up novel perspectives at the interface between photonics and ultrafast electronics.

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“…Transition metal chalcogenides (TMCs) have rapidly acquired the status of technology materials of interest during the past decade because of their immensely interesting application-worthy physical properties ( Jariwala et al., 2014 )( Sebastian et al., 2021 ) ( Barani et al., 2021 ) ( Zhang et al., 2019 )( Lee et al., 2017 ) ( Briggs et al., 2019 ) ( Mak et al., 2019 ), ( Shin et al., 2012 ). Amongst the various materials belonging to this class, MoS 2 has perhaps been the most investigated one in recent years, a remarkable feature of MoS 2 being its intrinsic ability to support multiple polymorphs( Acerce et al., 2017 ).…”

Section: Introductionmentioning

confidence: 99%