Zobrazeno 1 - 10
of 879
pro vyhledávání: '"Carpene, A"'
Autor:
Abdul-Aziz, Omar, Wolverson, Daniel, Sayers, Charles, Carpene, Ettore, Parmigiani, Fulvio, Hedayat, Hamoon, van Loosdrecht, Paul H. M.
We report a comprehensive Raman study of the phonon behaviour in PdSe$_2$ in the temperature range of 5 K to 300 K. A remarkable change in the Raman spectrum is observed at 120 K: a significant enhancement of the out-of-plane phonon A$^{1}_{g}$ mode,
Externí odkaz:
http://arxiv.org/abs/2405.09166
Autor:
C. J. Sayers, Y. Zhang, C. E. Sanders, R. T. Chapman, A. S. Wyatt, G. Chatterjee, E. Springate, G. Cerullo, D. Wolverson, E. Da Como, E. Carpene
Publikováno v:
Communications Physics, Vol 7, Iss 1, Pp 1-6 (2024)
Abstract The driving force of a charge density wave (CDW) transition in quasi-two dimensional systems is still debated, while being crucial in understanding electronic correlation in such materials. Here we use femtosecond time- and angle-resolved ph
Externí odkaz:
https://doaj.org/article/b84b702fa7e34c189012ae70726cdfd7
Autor:
Sayers, C. J., Cerullo, G., Zhang, Y., Sanders, C. E., Chapman, R. T., Wyatt, A. S., Chatterjee, G., Springate, E., Wolverson, D., Da Como, E., Carpene, E.
1$T$-TaSe$_2$ is widely believed to host a Mott metal-insulator transition in the charge density wave (CDW) phase according to the spectroscopic observation of a band gap that extends across all momentum space. Previous investigations inferred that t
Externí odkaz:
http://arxiv.org/abs/2303.06188
Autor:
Sayers, Charles J., Conte, Stefano Dal, Wolverson, Daniel, Gadermaier, Christoph, Cerullo, Giulio, Carpene, Ettore, Da Como, Enrico
Publikováno v:
Adv. Optical Mater. 2022, 2200362
The excitation and detection of coherent phonons has given unique insights into condensed matter, in particular for materials with strong electron-phonon coupling. We report a study of coherent phonons in the layered charge density wave (CDW) compoun
Externí odkaz:
http://arxiv.org/abs/2206.00126
Autor:
Sirica, N., Hedayat, H., Bugini, D., Koehler, M. R., Li, L., Parker, D. S., Mandrus, D. G., Dallera, C., Carpene, E., Mannella, N.
Publikováno v:
Phys. Rev. B 104, 174426 (2021)
We investigate the static and ultrafast magneto-optical response of the hexagonal chiral helimagnet $Cr_{1/3}NbS_{2}$ above and below the helimagnetic ordering temperature. The presence of a magnetic easy plane contained within the crystallographic a
Externí odkaz:
http://arxiv.org/abs/2111.11465
Publikováno v:
2D Materials (2021)
Two-dimensional (2D) materials with puckered layer morphology are promising candidates for next-generation opto-electronics devices owing to their anisotropic response to external perturbations and wide band gap tunability with the number of layers.
Externí odkaz:
http://arxiv.org/abs/2107.01164
Autor:
Hedayat, Hamoon, Bugini, Davide, Yi, Hemian, Chen, Chaoyu, Zhou, Xingjiang, Cerullo, Giulio, Dallera, Claudia, Carpene, Ettore
Publikováno v:
Sci. Rep. 11, 4924 (2021)
We use circular dichroism (CD) in time- and angle-resolved photoemission spectroscopy (trARPES) to measure the femtosecond charge dynamics in the topological insulator (TI) Bi$_{2}$Te$_{3}$. We detect clear CD signatures from topological surface stat
Externí odkaz:
http://arxiv.org/abs/2102.03766
Autor:
Hedayat, Hamoon, Sayers, Charles J., Ceraso, Arianna, van Wezel, Jasper, Clark, Stephen R., Dallera, Claudia, Cerullo, Giulio, Da Como, Enrico, Carpene, Ettore
Publikováno v:
New J. Phys. 23, 033025 (2021)
Photoinduced non-thermal phase transitions are new paradigms of exotic non-equilibrium physics of strongly correlated materials. An ultrashort optical pulse can drive the system to a new order through complex microscopic interactions that do not occu
Externí odkaz:
http://arxiv.org/abs/2012.02660
Autor:
Sayers, C. J., Hedayat, H., Ceraso, A., Museur, F., Cattelan, M., Hart, L. S., Farrar, L. S., Conte, S. Dal, Cerullo, G., Dallera, C., Da Como, E., Carpene, E.
Publikováno v:
Phys. Rev. B 102, 161105(R) (2020)
1$T$-TaSe$_{2}$ is host to coexisting strongly-correlated phases including charge density waves (CDWs) and an unusual Mott transition at low temperature. Here, we investigate coherent phonon oscillations in 1$T$-TaSe$_{2}$ using a combination of time
Externí odkaz:
http://arxiv.org/abs/2009.05025
Autor:
Hedayat, H., Ceraso, A., Soavi, G., Akhavan, S., Cadore, A., Dallera, C., Cerullo, G., Ferrari, A. C., Carpene, E.
Publikováno v:
2D Materials 8, 025020 (2021)
Black phosphorous (BP) is a layered semiconductor with high carrier mobility, anisotropic optical response and wide bandgap tunability. In view of its application in optoelectronic devices, understanding transient photo-induced effects is crucial. He
Externí odkaz:
http://arxiv.org/abs/2007.09754