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Cited by 310

The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.

Ultrafast Carrier Thermalization and Cooling Dynamics in Few-Layer MoS2

Nie, Zhaogang, Long, Run, Sun, Linfeng, Huang, Chung-Che, Zhang, Jun, Xiong, Qihua, Hewak, Daniel W., Shen, Zexiang, Prezhdo, Oleg V., Loh, Zhi-Heng·2014·ACS Nano

Abstract

Femtosecond optical pump-probe spectroscopy with 10 fs visible pulses is employed to elucidate the ultrafast carrier dynamics of few-layer MoS2. A nonthermal carrier distribution is observed immediately following the photoexcitation of the A and B excitonic transitions by the ultrashort, broadband laser pulse. Carrier thermalization occurs within 20 fs and proceeds via both carrier-carrier and carrier-phonon scattering, as evidenced by the observed dependence of the thermalization time on the carrier density and the sample temperature. The n(-0.37 ± 0.03) scaling of the thermalization time with carrier density suggests that equilibration of the nonthermal carrier distribution occurs via non-Markovian quantum kinetics. Subsequent cooling of the hot Fermi-Dirac carrier distribution occurs on the ∼ 0.6 ps time scale via carrier-phonon scattering. Temperature- and fluence-dependence studies reveal the involvement of hot phonons in the carrier cooling process. Nonadiabatic ab initio molecular dynamics simulations, which predict carrier-carrier and carrier-phonon scattering time scales of 40 fs and 0.5 ps, respectively, lend support to the assignment of the observed carrier dynamics.

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Metadata

Authors
Nie, Z., Long, R., Sun, L., Huang, C.-C., Zhang, J., Xiong, Q., Hewak, D. W., Shen, Z., Prezhdo, O. V., & Loh, Z.-H.
Venue
ACS Nano
Published
2014-10-02
Volume
8
Issue
10
Pages
10931-10940
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2127527950
Cited by
310
References
3
FWCI
8.93
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Ultrafast Carrier Thermalization and Cooling Dynamics in Few-Layer MoS2. https://app.cochat.ai/papers/10.1021/nn504760x
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Nie, Z., Long, R., Sun, L., Huang, C.-C., Zhang, J., Xiong, Q., Hewak, D. W., Shen, Z., Prezhdo, O. V., & Loh, Z.-H. (2014). Ultrafast Carrier Thermalization and Cooling Dynamics in Few-Layer MoS2. ACS Nano. https://doi.org/10.1021/nn504760x

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