Výsledky vyhledávání - "Marvel R. E."

Akademický článek

Ultrafast Hot Electron Induced Phase Transitions in Vanadium Dioxide

Autor: Haglund R. F., Marvel R. E., Hontani Y., Hada M., Matsuo J.

Publikováno v: EPJ Web of Conferences, Vol 41, p 03005 (2013)

The Au/Cr/VO2/Si system was investigated in pump–probe experiments. Hot-electrons generated in the Au were found to penetrate into the underlying VO2 and couple with its lattice inducing a semiconductor-to-metal phase transition in ~2 picoseconds.

Externí odkaz: https://doaj.org/article/26769b56a81748739620807a4936320c

Zobrazit plný text záznamu

Report

Ultrafast mid-infrared nanoscopy of strained vanadium dioxide nanobeams

Autor: Huber, M. A., Plankl, M., Eisele, M., Marvel, R. E., Sandner, F., Korn, T., Schüller, C., Haglund, Jr., R. F., Huber, R., Cocker, T. L.

Publikováno v: Nano Letters 16, 1421-1427 (2016)

Long regarded as a model system for studying insulator-to-metal phase transitions, the correlated electron material vanadium dioxide (VO$_2$) is now finding novel uses in device applications. Two of its most appealing aspects are its accessible trans

Externí odkaz: http://arxiv.org/abs/1604.04306

Zobrazit plný text záznamu

Report

Tunneling Breakdown of a Strongly Correlated Insulating State in VO$_2$ Induced by Intense Multi-Terahertz Excitation

Autor: Mayer, B., Schmidt, C., Grupp, A., Bühler, J., Oelmann, J., Marvel, R. E., Haglund Jr., R. F., Oka, T., Brida, D., Leitenstorfer, A., Pashkin, A.

Publikováno v: Phys. Rev. B 91, 235113 (2015)

We directly trace the near- and mid-infrared transmission change of a VO$_2$ thin film during an ultrafast insulator-to-metal transition triggered by high-field multi-terahertz transients. Non-thermal switching into a metastable metallic state is gov

Externí odkaz: http://arxiv.org/abs/1505.01273

Zobrazit plný text záznamu

Optical Pump – THz Probe Response of VO2 under High Pressure

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

Publikováno v: XXI. International Conference on Ultrafast Phenomena, 15.-20.07.2018, Hamburg, Deutschland
XXI International Conference on Ultrafast Phenomena, 15.-20.07.2018, Hamburg, DeutschlandProceedings of Ultrafast Phenomena XXI, 91944 Les Ulis cedex A-France: EDP Sciences Web of Conferences

We present the ultrafast THz response of VO2 under high pressures. A clear anomaly is observed around 8 GPa indicating a pressure-induced phase transition. Our observations can be interpreted in terms of a bandwidth-controlled Mott-Hubbard transition

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::dd0079430df1f35dc3073bdb26458e8e
https://www.hzdr.de/publications/Publ-28299-1

Zobrazit plný text záznamu

Ultrafast response of photoexcited carriers in VO₂ at high-pressure

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund Jr., R. F., Pashkin, A.

Publikováno v: New Journal of Physics 20(2018), 083003

We utilize near-infrared pump — mid-infrared probe spectroscopy to investigate the ultrafast electronic response of pressurized VO₂. A clear anomaly in the linear mid-infrared response as well as in the fluence dependence of the pump-probe signal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::167613624ecb08c1613e2c99ef3f298d
https://www.hzdr.de/publications/Publ-27283-1

Zobrazit plný text záznamu

Photo-induced THz response of VO2 under high pressures

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

Publikováno v: Non-equilibrium Dynamics of Condensed Matter in the Time Domain, 03.-06.09.2018, Kerkrade, Netherlands

We apply ultrafast optical pump – THz probe spectroscopy in order to investigate the nature of the high pressure metallic state of VO2 single crystal. The pump excitation was performed using near-infrared pulses at the wavelength of 800 nm. The pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::e16529c240de3bdfe35c1029101c60a8
https://www.hzdr.de/publications/Publ-28305-1

Zobrazit plný text záznamu

Bandwidth-controlled metallization in pressurized VO₂ revealed by optical pump – THz probe spectroscopy

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

Publikováno v: Optical Terahertz Science and Technology (OTST 2017), 02.-07.04.2017, London, United Kingdom

Vanadium dioxide (VO₂) is a classic example of a transition metal oxide showing a sharp first- order insulator-to-metal transition (IMT) around 340 K accompanied by a pronounced structural transformation. Pressure-induced metallization of VO₂ has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::2a442e864fd1a10d56adef601469d3eb
https://www.hzdr.de/publications/Publ-26398-1

Zobrazit plný text záznamu

The nature of the pressure-induced metallization in VO₂

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

Publikováno v: DPG-Frühjahrstagung 2017, 19.-24.03.2017, Dresden, Deutschland

We utilize ultrafast optical pump - THz probe spectroscopy in order to investigate the pressure-driven insulator-to-metal transition (IMT) in vanadium dioxide (VO₂). The probe pulses with central frequency of 30 THz enable a sensitive detection of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::e9d7261fc845a9777389745702016e07
https://www.hzdr.de/publications/Publ-26397-1

Zobrazit plný text záznamu

Ultrafast carrier dynamics in VO₂ across the pressure-induced insulator-to-metal transition

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

We utilize near-infrared pump ‒ mid-infrared probe spectroscopy to investigate the ultrafast electronic response of pressurized VO₂. Distinct pump‒probe signals and a pumping threshold behavior are observed even in the pressure-induced metallic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::957e0d0aef7674a0bf4f05636b5f5ff0
https://www.hzdr.de/publications/Publ-25953-2

Zobrazit plný text záznamu

Pressure-Induced Metallization in VO₂ Studied by Optical Pump – THz Probe Spectroscopy

Autor: Braun, J. M., Schneider, H., Helm, M., Mirek, R., Boatner, L. A., Marvel, R. E., Haglund, R. F., Pashkin, A.

Publikováno v: CLEO 2017 (Conference on Lasers and Electro-Optics), 14.-19.05.2017, San Jose, USA

We have investigated pressurized VO₂ using optical pump – THz probe spectroscopy. Distinct pump-probe signals and an excitation threshold are observed even in the metallic state. Our results are consistent with a pressure-driven Mott-Hubbard tran

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4577::34c1d7009e11c8cd7a6c434c610b6b77
https://www.hzdr.de/publications/Publ-26400-1

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání