The race to realize room-temperature superconductivity seems to have been won by the diamond anvil cell that attains Mbar pressures in the palm of one’s hand. What makes this an even more intriguing, paradigm shifting discovery is that it is driven by a strong interplay between theory and experiment. With the focus on realizing metallization in elemental hydrogen, static and dynamic high-pressure science has evolved from simple laboratory-based studies to a multi-dimensional, collaborative research effort centered around light sources and neutron facilities around the world. The spate of discoveries in recent times have therefore not surprisingly centered around the realization of metal hydrides with ever-increasing hydrogen content predicted by Neil Ashcroft to hold the key to room-temperature and hopefully room-pressure superconductivity. Understanding the physics and chemistry of these materials is the key to advancements hitherto and one of the primary areas is structural insight that is currently only a privy of theoretical simulations. This session intends to bring together theorists and experimentalists who can have a dialog on designing the tools that can allow better understanding of the underlying phenomena in hydride superconductors.

Chairs: Nandini Garg (Bhabha Atomic Research Centre, IN) & Maddury Somayazulu (Argonne National Laboratory, USA)

Invited speakers:

• Ashok Verma (Bhabha Atomic Research Centre, IN)
• Eva Zurek (SUNY Buffalo, USA)
• Dmitrii Semenok (Skolkovo Institute of Science and Technology, RU)
• Ashkan Salamat (University of Nevada, Las Vegas, USA)
• Mikhail Eremets (Max Planck Institute for Chemistry, DE)
• Ranga Dias (University of Rochester, USA)
• Bianca Haberl (Oak Ridge National Laboratory, USA)

With dynamic drivers now or soon becoming available on free electron lasers as well as third- and fourth-generation synchrotron sources worldwide, the field of crystallography under dynamic compression is rapidly expanding.   Measurements of crystal structure under dynamic compression offer the opportunity to test model predictions at new extremes of high pressure and temperature, to explore the impact of strain rate on material response, and to access novel metastable states.  Dynamic compression also poses unique challenges for high pressure x-ray diffraction measurements:  requirements for adequate signal levels at rapid time scales sometimes necessitate x-ray sources with a broad or multi-line energy spectrum; fast detection requires new types of detectors;  and the nature of the dynamic drivers sometimes results in high and complex x-ray backgrounds.  This session will aim to present the newest scientific results and technical developments in the field.

Chairs: Amy Lazicki (Lawrence Livermore National Laboratory, USA) & June Wicks (John Hopkins University, USA)

Invited speakers:

• Thomas Duffy (Princeton University, USA)
• Takuo Okuchi (Kyoto University, JP)
• Rachel Husband (Deutsche Elektronen-Synchrotron DESY, DE)
• Arianna Gleason (SLAC National Accelerator Laboratory, USA)
• Minxue Tang (Southwest Jiao Tong University, CN, Deutsches Elektronen-Synchrotron DESY, DE)
• Emma McBride (SLAC National Accelerator Laboratory, USA)

Over a myriad of minerals are known to constitute our planet from the core to the surface, each with unique crystal structure and intriguing physical and chemical properties, while further great discoveries await particularly when pressure and temperature conditions are varied. In the last decades, geoscientists have been routinely applying high-pressure crystallography techniques in laboratories and synchrotron facilities around the world, thus advancing our understanding of the mineralogy of the Earth’s deep interiors, and that of other planets as well. This session focuses on experimental and theoretical breakthroughs in the field of high-pressure crystallography that aid the exploration of planetary interior. We invite contributions on topics such as phase relations, crystal structure and chemistry, thermoelasticity, and chemical reactions of minerals and mineral assemblages in a high pressure environment, as well as studies on natural specimen such as inclusions and meteorites.

Chairs: Dongzhou Zhang (University of Hawaii at Manoa, USA) & Stella Chariton (The University of Chicago, USA)

Invited speakers:

• Dan Shim (Arizona State University, USA)
• Leonid Dubrovinsky (Bayerisches Geoinstitut, DE)
• Fabrizio Nestola (University of Padova, IT)
• Anna Pakhomova (European Synchrotron Radiation Facility, FR)
• Tianqi Xie (University of Western Ontario, CA)
• Xiaojing Lai (China University of Geosciences, CN)

To understand complex nature of the materials subjected to extreme pressure, temperature and strain the physical and chemical properties of samples should be probed in-situ with state-of-the-art high spatial and energy resolution multimodal diagnostic tools. This session welcomes all contributions that will highlight cutting-edge developments in generation of extreme sample conditions, synthesis and characterization using advance experimental and analytical approaches.

Chairs: Narcizo Marques Souza-Neto (Brazilian Synchrotron Light Laboratory, BR) & Vitali Prakapenka (The University of Chicago, USA)

Invited speakers:

• Bin Chen (University of Hawaii at Manoa, USA)
• Andrei Rogalev (European Synchrotron Radiation Facility, FR)
• Estelle Ledoux (The University of Utah, USA)
• Simon Hunt (University of Manchester, UK)
• Krzysztof Wozniak (University of Warsaw, PL)
• Jiyong Zhao (Argonne National Laboratory, USA)
  

With the increase in computational power and progress in materials simulations, computational approaches have become an integral and indispensable area of research in extreme-conditions science. This session invites contributions from applications of and developments in computational methods to studies of matter at extreme conditions including materials discovery, high-pressure and -temperature properties, applications to Earth and planetary sciences, etc.

Chairs: Renata Wentzcovitch (Columbia University, Applied Physics and Applied Mathematics, USA) & Zhongqing Wu (University of Science and Technology of China, CN)

Invited speakers:

• Razvan Caracas (Institut de Physique du Globe de Paris, FR)
• Qiang Zhu (University of Nevada, USA)
• John Tse (University of Saskatchewan, CA)

In addition to traditional thermochemical synthetic methods, high-pressure “barochemical” synthesis represents a unique and effective approach for inducing and controlling chemical reactions. The importance of high-pressure chemistry and the interests of its researchers, span fundamental organic/inorganic and geochemical reactions, as well as the synthetic quest for new functional optical, electronic, and magnetic materials, in addition to high-energy-density compounds and superhard structures. High-pressure reactions are typically conducted within diamond anvil cells, often combined with high-temperature laser heating, and may be transferred to multianvil or Paris-Edinburgh presses that enable large-volume sample scaling of laboratory results. This session aims to showcase the richness and diversity of experimental high-pressure chemistry, and stimulate discussions for future directions in this area of research.

Chairs: Timothy Strobel (Earth and Planets Laboratory, USA) & Kamil Filip Dziubek (LENS – European Laboratory for Non-Linear Spectroscopy, IT)

Invited speakers:

• James Walsh (University of Massachusetts Amherst Laboratory for High-Pressure Chemistry, USA)
• Irina Chuvashova (Florida International University, USA)
• Matteo Ceppatelli (LENS – European Laboratory for Non-Linear Spectroscopy, IT)
• Haiyan Zheng (HPSTAR, CN)
• Dominique Laniel (The University of Edinburgh, UK)
• Sikai Wu (Penn State University, USA)
• Alex Goncharov (Earth and Planets Laboratory, USA)

The last decade has seen the maturity of various X- and gamma-ray spectroscopies to probe magnetic and electronic properties of materials at extreme P-T conditions. These now rival and complement structural investigations, which had matured to its current state of extreme P-T investigations much earlier than spectroscopic probes. To this end, the interplay amongst structural, magnetic and electronics aspects of the solid state at P-T extremes is now amenable to investigation. This is of pertinence to the pressure tuning of strongly correlated electron systems (SCES), investigation of materials and minerals under in-situ deep Earth geophysical conditions and stabilization of exotic new high P-T structural phases and stoichiometries. This session seeks to demonstrate what available magnetic-electronic probes at extreme P-T has accomplished in the last decade and potential future developments. There will be exemplary presentations of topical SCES and geophysical compounds that have undergone extreme P-T instigated, spin-state transitions, insulator-metal transitions and magnetic collapse, magnetic transitions, triggering of intermediate valences and charge transfer behavior, as well as superconducting transitions.

Chairs: Giovanni Hearne (University of Johannesburg, ZA) & Haozhe (Arthur) Liu (HPSTAR, CN)

Invited speakers:

• Peter Adler (Max-Planck-Institute for Chemical Physics of Solids, DE)
• Wenli Bi (University of Alabama, USA)
• Yuming Xiao (Argonne National Laboratory, USA)
• Xiancheng Wang (Institute of Physics, CAS , CN)
  
• Ricardo Donizeth (SIRIUS synchrotron, BR)
• Susannah Dorfman (Michigan State University, USA)
• Jennifer Jackson (Caltech Seismological Laboratory, USA)

Elastic and rheological properties of materials are directly linked to their atomic structures through bond strength and defects. Understanding these properties at the atomic level is vital in physics, materials science, earth and planetary sciences, as well as industrial applications. This session invites contributions from both experimental and theoretical studies in these areas. Technical developments highlighting new state-of-the-art methodologies are also welcome.

Chairs: Yanbin Wang (The University of Chicago, USA) & Guoyin Shen (Argonne National Lab, USA)

Invited speakers:

• Zhu Mao (University of Science and Technology of China, CN)
• Baosheng Li (Stony Brook University, USA)
• Christine Wu (Lawrence Livermore National Lab)
• Patrick Cordier (Université de Lille, UMET, FR)
• Darren Pagan (Penn State University, USA)
• Tomoo Katsura (Bayerisches Geoinsitut, DE)

Non-crystalline matter lacks long-range translational periodic symmetry that defines a crystal, resulting in many novel behavior and properties distinct from their crystalline counterparts. Seemingly disordered non-crystalline matter can still show rich local structural features that underlie its overall structure and determine its properties. At extreme conditions, the local structure order of non-crystalline matter could be significantly altered, exhibiting novel phases or phenomena otherwise inaccessible. Therefore, the enduring worldwide efforts devoted to non-crystalline matter at extreme conditions offer valuable opportunities for deepening our understanding of non-crystalline matter. This session aims to attract scientists working in the field of non-crystalline matter to discuss new advances and discoveries under extreme conditions in various non-crystalline matter ranging from liquids, melts, to various glasses. This session will provide the opportunity for stimulating insightful discussions and collaborations among scientists from Earth and planetary sciences, materials sciences, chemistry, and condensed matter physics.

Chairs: Zhidan Zeng (Shanghai Advanced Research in Physical Sciences, SHARPS, CN) & Tony Yu (The University of Chicago, USA)

Invited speakers:

1. Livia Bove (IMPMC, CNRS, Paris, FR & LQM, EPFL, Lausanne, CH)
2. Zhicheng Jing (Southern University of Science and Technology, CN)
3. Sung Keun Lee (Seoul National University, KR)
4. Guillaume Morard (ISTerre, Université Grenoble Alpes, FR)
5. Mainak Mookherjee (Florida State University, USA)
6. Qiaoshi (Charles) Zeng (Shanghai Advanced Research in Physical Sciences, SHARPS, CN)