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JULY 23, 2022 — New study from a team of scientists co-led by Drs. Yanhao Lin, Qingyang Hu and Ho-kwang Mao from HPSTAR and Michael Walter from Carnegie Institution for Science, first quantified the water storage capacity in stishovite of ~3.5 wt% in the transition zone and shallow lower mantle, decreasing to about 0.8 wt% at the base of the mantle. This study shows that stishovite / post...
2022-08-10
JUNE 27, 2022 — Valence change commonly happens in rare earth metals, while for Eu, it seems an exception in this group of metals. A team of scientists led by Dr. Yang Ding from HPSTAR published a study in the June 27 issue of the journal of Physical Review Letters confirming that a valence transition also occurred in Eu around 80 GPa along with a structural variation. Their study solved a long...
2022-06-28
MAY 28, 2022 — In recent work published as an Editors’Suggestion in Physical Review Letters, a team led by Dr. Ross Howie, and including HPSTAR (past and present) members Dr. Umbertoluca Ranieri, Dr. Mary-Ellen Donnelly, Dr. Philip Dalladay-Simpson, Prof. Eugene Gregoryanz, and Miss Huixin Hu report the high-pressure formation of the most H2-rich compounds found to date, (CH4)3(H2)25, CH4(H2)2 and...
2022-06-07
JUNE 1, 2022 — An international research group led by Dr. Thomas Meier from the Center of High Pressure Science and Technology Advanced Research (HPSTAR) in Beijing, where able to discover a unifying relationship in a number of distinct samples under extreme pressures. In particular, they were able to observe Hydrogen bond symmetrisations in the high-pressure polymorphs ice VII and X, magnesium ...
2022-06-01
MAY 5, 2022 — High-drive electromechanical applications require ferroelectrics accounting for a large coercive field and high piezoelectricity simultaneously but it is still a challenge. Here, a team co-led by Dr. Gang Liu from HPSTAR performs a closely integrated experimental and computational investigations to solve this long-standing puzzle and demonstrate it in a relaxor-based ferroelectric...
2022-05-05
APRIL 26, 2022 — New study from a team of scientists co-led by Dr. Qiaoshi Zeng from Center for High Pressure Science and Technology Advance Research reported a high-entropy-induced glass-to-glass transition in the NbNiZrTiCo high-entropy metallic glass. This glass-to-glass transition leads to a significant improvement of the modulus, hardness, and thermal stability. Their findings demonstrate that ...
2022-05-05
APRIL 30, 2022 — A team of researchers led by HPSTAR scientist Dr. Wenge Yang has recently used pressure-tuning to discover much richer transport properties emerging in a 400 nm thick bulk HgTe crystal, to rival the unique properties of its thin-film counterpart. Moreover, they also discovered superconductivity in a series of the bulk HgTe’s high-pressure phases. These fascinating results are...
2022-05-05
APRIL 20, 2022 — Recently, a research team led by Drs. Ho-kwang Mao, Haiyan Zheng and Kuo Li from Center for High Pressure Science and Technology Advanced Research (HPSTAR) synthesized ultrafine diamond nanothreads with perfect carbon/nitrogen ordered structure through a distinctive reaction of aromatic systems under high pressure, and thus proposed a new method to synthesize more novel structure-...
2022-04-20
APRIL 18, 2022 — Glass is everwhere around our life, like glass cup, and it has been made since ancient times. However, we still know very little about its structure in-depth due to confined characterization techniques. By making glass using berlinite crystals as starting materials, the team co-led by Dr. Qingyang Hu from HPSTAR proposed that a remaining topological ordering origin of glass and...
2022-04-18
MARCH 18, 2022 — A research group co-led by Dr. Wenge Yang of HPSTAR, has employed ultrafast laser-initiated time-resolved X-ray diffraction (TR-XRD) (with a time resolution of 79 picosenconds) to directly track the structural evolution of a prototypical two-dimensional (2D) lead-free perovskite (Cs3Bi2Br9) upon photoexcitation. Their work, “Visualizing Light-Induced Microstrain and Phase...
2022-03-30
FEBRUARY 21,2022 — Measuring and understanding the thermal conductivities of materials is essential for many practical applications we use daily, but what happens under high pressure? A new review paper of Thermal Conductivity of Materials under Pressure published recently in Nature Reviews Physics (online February 21st) by HPSTAR’s Dr. Xiaojia Chen summarizes the recent breakthroughs in high...
2022-03-14
FEBRUARY 10, 2022 — Over the past several decades, it is widely thought that the Earth inner core is solid composed of iron alloy, but a team of scientists led by Center for High Pressure Science and Technology Advance Research (HPSTAR) and Institute of Geochemistry of CAS (GYIG) suggests that the inner core is not a conventionally known solid but a mixture of solid iron and light-element fluids....
2022-02-10
JANUARY 18, 2022 — Materials with multi-stabilities controllable by external stimuli are potential for high-capacity information storage and switch devices. Second-harmonic-generation (SHG) as a distinct optical phenomenon is particularly suitable for information storage and readout, nevertheless, pressure-induced multi-step SHG switching material has rarely been reported. A research team led by ...
2022-01-18
JANUARY 18, 2022 — Materials with zero-linear compression (ZLC) and zero-area compression (ZAC) hold great promises for specific applications retaining constant in specific directions or planes under external impaction. Up to now, no more than ten ZLC/ZAC materials have been reported, most of which are of very limited working pressure ranges (< 10 GPa). Herein, a pioneering work led by Dr. Ting...
2022-01-18
JANUARY 6, 2022 — New work from a team of scientists co-led by Dr. Takayuki Ishii from HPSTAR reported that the large depressions of the 660-kilometre discontinuity in cold subduction zones is related to an extremely steep akimotoite-bridgmanite transition at low temperatures. The slab stagnation may also be casued by the significant upward buoyancy casued from this deeper and delayed transtion in...
2022-01-06
DECEMBER 28, 2021 — New research by a team led by Dr. Haiyan Zheng from HPSTAR reports a completely functionalized crystalline polyacetylene produced using high-pressure techniques - the first crystalline poly-dicarboxylacetylene with every carbon on the trans-polyacetylene backbone bonded to a carboxyl group. Its unique structure combines the extremely high content of carbonyl groups and high...
2021-12-28
DECEMBER 25, 2021 — Stimulus-responsive photoluminescent materials have attracted extensive research attention in recent years owing to their potential application in information storage and switch devices. Most of the materials that exhibit such phenomena are small organics, organometallic materials, liquid crystals, or polymer networks. At present, materials with high pressure sensitivity and...
2021-12-22
DECEMBER 15, 2021 — New study from a team of scientists led by Dr. Qingyang Hu found that the high-conductivity and low-sound velocity of ε-FeOOH matched the features of heterogenous scatterers in the mid-lower mantle and such unique properties of hydrous ε-FeOOH, or possibly other Fe-enriched phases could be detected as evidence of active water transportation in the mid-lower mantle.
2021-12-15
DECEMBER 15, 2021 — By combining the ultrasonic interferometry and multianvil press, a team of scientists led by Dr. Qigyang Hu from HPSTAR extended the research of diamond_sqlquote_s elasticity from kilobar to gigapascal pressures and showed that diamond became increasingly compressible, reaching agreement with theory. They pointed out the unique potential of diamond in providing an accurate,...
2021-12-15
NOVEMBER 20, 2021 — New work by a team of scientists led by Dr. Kuo Li and Dr. Haiyan Zheng from HPSTAR have found that pressure gradients across various hydrogen-bearing compounds, such as γ-MnOOH, can promote dehydrogenation. The team proposes a pressure-gradient-driven battery through this process by separating the transferring routes of protons and electrons. The results are published in the...
2021-11-30
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