Electron–hole liquid in a van der Waals heterostructure photocell at room temperature

Arp, Trevor; Pleskot, Dennis; Aji, Vivek; Gabor, Nathaniel

doi:10.1038/s41566-019-0349-y

Cited by 70 publications

(58 citation statements)

References 30 publications

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“…Microstructured devices incorporating laser-triggered photoconductive switches (Auston, 1975) have been used to investigate a variety of ultrafast transport phenomena, such as ballistic electron flow in carbon nanotubes (Zhong et al, 2008), helicitydependent photocurrents in topological insulators (Kastl et al, 2015), and the transport properties of Floquet-Bloch states in graphene (McIver et al, 2019). Ultrafast transport dynamics have also been probed in carbon nanotubes (Gabor et al, 2012), graphene (Sun et al, 2012), and various van der Waals heterostructures (Arp et al, 2019;Ma et al, 2016;Massicotte et al, 2016) by measuring the photocurrent generated in response to two time-delayed laser pulses.…”

Section: Discussionmentioning

confidence: 99%

Colloquium: Nonthermal pathways to ultrafast control in quantum materials

Torre

Kennes²,

Claassen³

et al. 2021

Rev. Mod. Phys.

293

128

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We review recent progress in utilizing ultrafast light-matter interaction to control the macroscopic properties of quantum materials. Particular emphasis is placed on photoinduced phenomena that do not result from ultrafast heating effects but rather emerge from microscopic processes that are inherently nonthermal in nature. Many of these processes can be described as transient modifications to the free energy landscape resulting from the redistribution of quasiparticle populations, the dynamical modification of coupling strengths and the resonant driving of the crystal lattice. Other pathways result from the coherent dressing of a material's quantum states by the light field. We discuss a selection of recently discovered effects leveraging these mechanisms, as well as the technological advances that led to their discovery. A road map for how the field can harness these nonthermal pathways to create new functionalities is presented.

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Section: Discussionmentioning

confidence: 99%

Colloquium: Nonthermal pathways to ultrafast control in quantum materials

Torre

Kennes²,

Claassen³

et al. 2021

Rev. Mod. Phys.

293

128

View full text Add to dashboard Cite

show abstract

“…The most important property of interlayer excitons is their extended recombination time due to the spatial separation of electrons and holes the excitons are composed of [77]. This makes it possible to study strongly correlated electron-hole states such as exciton condensation [78][79][80] and electron-hole liquid [81]. Recent papers on interlayer excitons have already been reviewed in Nat.…”

Section: E Interlayer Excitonsmentioning

confidence: 99%

Collective excitations in 2D materials

et al. 2020

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Research on 2D materials has been one of the fastest-growing fields in condensed matter physics and materials science in the past 10 years. The low dimensionality and strong correlations of 2D systems give rise to electronic and structural properties, in the form of collective excitations, that do not have counterparts in ordinary 3D materials used in modern technology. These 2D materials present extraordinary opportunities for new technologies, such as in flexible electronics. In this Review, we focus on plasmons, excitons, phonons and magnons in 2D materials. We discuss the theoretical formalism of these collective excitations and elucidate how they differ from their 3D counterparts.

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“…comparable to room temperature! Condensation of intralayer excitons in TMDs is, however, hindered by the short exciton lifetimes 23 and formation of competing exciton complexes at high densities, such as biexcitons 23 and electron-hole (e-h) droplets 26,27 . These difficulties can be overcome by separating the electrons and holes into two closely spaced layers in a double layer structure 3,5,25 .…”

mentioning

confidence: 99%