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Your search keyword '"Alexeev, Evgeny M."' showing total 6 results
Start Over Author "Alexeev, Evgeny M." Publisher nature publishing group uk
6 results on '"Alexeev, Evgeny M."'

3. Resonantly hybridized excitons in moiré superlattices in van der Waals heterostructures

Author

Alexeev, Evgeny M., Ruiz-Tijerina, David A., Danovich, Mark, Hamer, Matthew J., Terry, Daniel J., Nayak, Pramoda K., Ahn, Seongjoon, Pak, Sangyeon, Lee, Juwon, Sohn, Jung Inn, Molas, Maciej R., Koperski, Maciej, Watanabe, Kenji, Taniguchi, Takashi, Novoselov, Kostya S., Gorbachev, Roman V., Shin, Hyeon Suk, Fal’ko, Vladimir I., and Tartakovskii, Alexander I.

Published
2019
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5. Author Correction: Resonantly hybridized excitons in moiré superlattices in van der Waals heterostructures

Author

Alexeev, Evgeny M., Ruiz-Tijerina, David A., Danovich, Mark, Hamer, Matthew J., Terry, Daniel J., Nayak, Pramoda K., Ahn, Seongjoon, Pak, Sangyeon, Lee, Juwon, Sohn, Jung Inn, Molas, Maciej R., Koperski, Maciej, Watanabe, Kenji, Taniguchi, Takashi, Novoselov, Kostya S., Gorbachev, Roman V., Shin, Hyeon Suk, Fal’ko, Vladimir I., and Tartakovskii, Alexander I.

Published
2019
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6. Efficient phonon cascades in WSe 2 monolayers

Author

Paradisanos, Ioannis, Wang, Gang, Alexeev, Evgeny M., Cadore, Alisson R., Marie, Xavier, Ferrari, Andrea C., Glazov, Mikhail M., Urbaszek, Bernhard, Paradisanos, Ioannis [0000-0001-8310-710X], Alexeev, Evgeny M. [0000-0002-8149-6364], Marie, Xavier [0000-0002-7772-2517], Ferrari, Andrea C. [0000-0003-0907-9993], Glazov, Mikhail M. [0000-0003-4462-0749], Urbaszek, Bernhard [0000-0003-0226-7983], and Apollo - University of Cambridge Repository

Subjects
639/766/119/995, Condensed Matter::Materials Science, article, 639/301/357/1018, 140/133, 128, 140/125
Abstract

Energy relaxation of photo-excited charge carriers is of significant fundamental interest and crucial for the performance of monolayer transition metal dichalcogenides in optoelectronics. The primary stages of carrier relaxation affect a plethora of subsequent physical mechanisms. Here we measure light scattering and emission in tungsten diselenide monolayers close to the laser excitation energy (down to ~0.6 meV). We reveal a series of periodic maxima in the hot photoluminescence intensity, stemming from energy states higher than the A-exciton state. We find a period ~15 meV for 7 peaks below (Stokes) and 5 peaks above (anti-Stokes) the laser excitation energy, with a strong temperature dependence. These are assigned to phonon cascades, whereby carriers undergo phonon-induced transitions between real states above the free-carrier gap with a probability of radiative recombination at each step. We infer that intermediate states in the conduction band at the Λ-valley of the Brillouin zone participate in the cascade process of tungsten diselenide monolayers. This provides a fundamental understanding of the first stages of carrier–phonon interaction, useful for optoelectronic applications of layered semiconductors.

Published
2021

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