485 citations · 659 across the 15 of their papers we have counts for
13 papers · 1 filter
Ethane and methane at high pressures: structure and stability
Elissaios Stavrou, Alexander A. Maryewski, Sergey Lobanov +4
We have performed a combined experimental and theoretical study of ethane and methane at high pressures up to 120 GPa at 300 K using x-ray diffraction and Raman spectroscopy and th…
Structural study of TATB under detonation-induced shock conditions
Elissaios Stavrou, Michael Bagge-Hansen, Joshua A. Hammons +13
We explore the response of the insensitive high explosive (IHE) 1,3,5-Triamino-2,4,6- trinitrobenzene (TATB) under detonation-induced shock conditions using in-situ synchrotron X-r…
High-pressure structural study of a-Mn: solving a three decades-old mystery
Logan K. Magad-Weiss, Adebayo A. Adeleke, Eran Greenberg +3
Manganese, in the a-Mn structure, has been studied using synchrotron powder x-ray diffraction in a diamond anvil cell up to 220 GPa at room temperature combined with density functi…
Detonation-induced transformation of graphite to hexagonal diamond
Elissaios Stavrou, Michael Bagge-Hansen, Joshua A. Hammons +20
We explore the structural evolution of highly oriented pyrolytic graphite (HOPG) under detonation-induced shock conditions using in-situ synchrotron X-ray diffraction in the ns tim…
Observation of a metastable intermediate during solid-solid phase transformation in response to rapid compression
Michael R. Armstrong, Harry B. Radousky, Ryan A. Austin +23
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-…
Anharmonicity-induced isostructural phase transition of Zirconium under pressure
Elissaios Stavrou, Lin H. Yang, Per Soderlind +8
We have performed a detailed x-ray diffraction structural study of Zr under pressure and unambiguously identify the existence of a first-order isostructural bcc-to-bcc phase transi…
High-Pressure Synthesis of a Pentazolate Salt
Brad A. Steele, Elissaios Stavrou, Jonathan C. Crowhurst +3
The pentazolates, the last all-nitrogen members of the azole series, have been notoriously elusive for the last hundred years despite enormous efforts to make these compounds in ei…
Synthesis of ultra-incompressible sp3-hybridized carbon nitride
Elissaios Stavrou, Sergey Lobanov, Huafeng Dong +4
Search of materials with C-N composition hold a great promise in creating materials which would rival diamond in hardness due to the very strong and relatively low-ionic C-N bond.…
Synthesis of Sodium Polyhydrides at High Pressures
Viktor V. Struzhkin, DuckYoung Kim, Elissaios Stavrou +6
The only known compound of sodium and hydrogen is archetypal ionic NaH. Application of high pressure is known to promote states with higher atomic coordination, but extensive searc…
Backbone NxH Compounds at High Pressures
Alexander F. Goncharov, Nicholas Holtgrewe, Guangrui Qian +11
Optical and synchrotron x-ray diffraction diamond anvil cell experiments have been combined with first principles theoretical structure predictions to investigate mixed N2 and H2 u…
Stability of numerous novel potassium chlorides at high pressure
Weiwei Zhang, Artem R. Oganov
K-Cl is a simple system displaying all four main types of bonding, as it contains (i) metallic potassium, (ii) elemental chlorine made of covalently bonded Cl2 molecules held toget…
Unexpected stable stoichiometries of sodium chlorides
Weiwei Zhang, Artem R. Oganov, Alexander F. Goncharov +7
Sodium chloride (NaCl), or rocksalt, is well characterized at ambient pressure. Due to the large electronegativity difference between Na and Cl atoms, it has highly ionic chemical…
Unexpected stable stoichiometries of sodium chlorides
Weiwei Zhang, Artem R. Oganov, Alexander F. Goncharov +5
At ambient pressure, sodium, chlorine, and their only known compound NaCl, have well-understood crystal structures and chemical bonding. Sodium is a nearly-free-electron metal with…