Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Holtgrewe, Nicholas"'
Autor:
Geballe, Zachary M., Holtgrewe, Nicholas, Karandikar, Amol, Greenberg, Eran, Prakapenka, Vitali B., Goncharov, Alexander F.
Publikováno v:
Phys. Rev. Materials 5, 033803 (2021)
The high-pressure melting curves of metals provide simple and useful tests for theories of melting, as well as important constraints for the modeling of planetary interiors. Here, we present an experimental technique that reveals the latent heat of f
Externí odkaz:
http://arxiv.org/abs/2008.06087
Water is abundant in natural environments but the form it resides in planetary interiors remains uncertain. We report combined synchrotron X-ray diffraction and optical spectroscopy measurements of H2O in the laser-heated diamond anvil cell up to 150
Externí odkaz:
http://arxiv.org/abs/2007.07715
Autor:
Hsieh, Wen-Pin, Goncharov, Alexander F., Labrosse, Stéphane, Holtgrewe, Nicholas, Lobanov, Sergey S., Chuvashova, Irina, Deschamps, Frédéric, Lin, Jung-Fu
Earth core is composed of iron (Fe) alloyed with light elements, e.g., silicon (Si). Its thermal conductivity critically affects Earth thermal structure, evolution, and dynamics, as it controls the magnitude of thermal and compositional sources requi
Externí odkaz:
http://arxiv.org/abs/2006.06271
Autor:
Lobanov, Sergey S., Holtgrewe, Nicholas, Ito, Gen, Badro, James, Piet, Helene, Nabiei, Farhang, Lin, Jung-Fu, Bayarjargal, Lkhamsuren, Wirth, Richard, Schreiber, Anja, Goncharov, Alexander F.
The heat flux across the core-mantle boundary (QCMB) is the key parameter to understand the Earth/s thermal history and evolution. Mineralogical constraints of the QCMB require deciphering contributions of the lattice and radiative components to the
Externí odkaz:
http://arxiv.org/abs/1911.04136
Autor:
Lobanov, Sergey S., Soubiran, François, Holtgrewe, Nicholas, Badro, James, Lin, Jung-Fu, Goncharov, Alexander F.
Earth/s lowermost mantle displays complex geological structures that likely result from heterogeneous thermal and electromagnetic interaction with the core. Geophysical models of the core-mantle boundary (CMB) region rely on the thermal and electrica
Externí odkaz:
http://arxiv.org/abs/1909.01438
Autor:
Jiang, Shuqing, Holtgrewe, Nicholas, Geballe, Zachary M., Lobanov, Sergey S., Mahmood, Mohammad F., McWilliams, R. Stewart, Goncharov, Alexander F.
The insulator-to-metal transition in dense fluid hydrogen is an essential phenomenon to understand gas giant planetary interiors and the physical and chemical behavior of highly compressed condensed matter. Using fast laser spectroscopy techniques to
Externí odkaz:
http://arxiv.org/abs/1810.01360
Autor:
Armstrong, Michael R., Radousky, Harry B., Austin, Ryan A., Stavrou, Elissaios, Zong, Hongxiang, Ackland, Graeme J., Brown, Shaughnessy, Crowhurst, Jonathan C., Gleason, Arianna E., Granados, Eduardo, Grivickas, Paulius, Holtgrewe, Nicholas, Lee, Hae Ja, Li, Tian T., Lobanov, Sergey, McKeown, Joseph T., Nagler, Robert, Nam, Inhyuk, Nelson, Art J., Prakapenka, Vitali, Prescher, Clemens, Roehling, John D., Teslich, Nick E., Walter, Peter, Goncharov, Alexander F., Belof, Jonathan L.
In order to probe the mechanism of solid-solid phase transformations, we have applied ultrafast shock wave compression (120 picosecond duration) and ultrashort (130 femtosecond) x-ray diffraction at the Linac Coherent Light Source (LCLS) to probe the
Externí odkaz:
http://arxiv.org/abs/1808.02181
Autor:
Jiang, Shuqing, Holtgrewe, Nicholas, Lobanov, Sergey S., Su, Fuhai, Mahmood, Mohammad F., McWilliams, R. Stewart, Goncharov, Alexander F.
Diatomic nitrogen is an archetypal molecular system known for its exceptional stability and complex behavior at high pressures and temperatures, including rich solid polymorphism, formation of energetic states, and an insulator-to-metal transformatio
Externí odkaz:
http://arxiv.org/abs/1711.02596
Autor:
Kruglov, Ivan A., Kvashnin, Alexander G., Goncharov, Alexander F., Oganov, Artem R., Lobanov, Sergey, Holtgrewe, Nicholas, Jiang, Shuqing, Prakapenka, Vitali, Greenberg, Eran, Yanilkin, Alexey V.
Hydrogen-rich hydrides attract great attention due to recent theoretical (1) and then experimental discovery of record high-temperature superconductivity in H3S (Tc = 203 K at 155 GPa (2)). Here we search for stable uranium hydrides at pressures up t
Externí odkaz:
http://arxiv.org/abs/1708.05251
Thermal conductivity of the lowermost mantle governs the heat flow out of the core energizing planetary-scale geological processes. Yet, there are no direct experimental measurements of thermal conductivity at relevant pressure-temperature conditions
Externí odkaz:
http://arxiv.org/abs/1609.06996