High Pressure Workshop

Contribution List

2. Opening remarks

Gediminas Simutis (PSI - Paul Scherrer Institut)

11/05/2026, 09:45

63. Pressure-induced ordering in the model quantum magnet DTN

Kirill Povarov (Helmholtz-Zentrum Dresden-Rossendorf, Dresden High Magnetic Field Laboratory)

11/05/2026, 10:00

Talk

We experimentally demonstrate pressure-induced ordering in the model S = 1 quantum paramagnet NiCl₂·4SC(NH₂)₂ (DTN) [1,2]. Employing TDO susceptibility and ultrasound techniques at high magnetic fields and low temperatures, we show that the spin gap vanishes and the magnetic order appears at a critical pressure P_c = 4.2(3) kbar [3]. Powder neutron...

47. Frustrated pyrochlore lattice in FeV$_{2}$O$_{4}$ under uniaxial pressure

Jana Pásztorová (Forschungszentrum Jülich, JCNS)

11/05/2026, 10:30

Talk

Multiferroics have been at the forefront of condensed-matter research for several decades due to their importance for fundamental understanding of the coupling between magnetic and electric properties, as well as their potential for the development of energy-efficient data storage technologies [1,2]. Magnetic spinels such as iron vanadate, FeV$_{2}$O$_{4}$, in which V ions occupy a...

48. Two Plaquette-Singlet Phases and Emergent SO(5) Deconfined Quantum Criticality in SrCu$_2$(BO$_3$)$_2$

Bruce Normand

11/05/2026, 10:50

Talk

The deconfined quantum critical point (DQCP) has become a central open concept in the physics of quantum matter. The theoretical proposal of a DQCP at the plaquette-singlet--to--antiferromagnet (PS--AFM) transition in the Shastry-Sutherland model was followed by experimental evidence for a minimal DQCP scenario induced by an applied magnetic field in SrCu$_2$(BO$_3$)$_2$. However, the nature...

46. Pressure Tuned Magnetism in the 3D Frustrated Antiferromagnet K₂Ni₂(SO₄)₃

S. S. Islam (PSI Center for Neutron and Muon Sciences CNM, 5232 Villigen PSI, Switzerland)

11/05/2026, 11:10

Talk

K₂Ni₂(SO₄)₃ is a three dimensional frustrated antiferromagnet in which Ni²⁺(S = 1) ions occupy two interpenetrating trillium sublattices that together form a unique tetra-trillium network. Recent thermodynamic, inelastic neutron scattering, and muon spin relaxation (μSR) studies show that, at ambient pressure and zero magnetic field, K₂Ni₂(SO₄)₃ hosts a highly dynamic, correlated ground state...

34. The life of biosystems coping with high hydrostatic pressure conditions

Prof. Peters

11/05/2026, 13:00

Talk

Life is thought to have appeared in the depth of the sea under high hydrostatic pressure (HHP). Indeed, it is known that the deep biosphere hosts a myriad of life forms thriving under high pressure conditions. However, the evolutionary mechanisms leading to their adaptation are still not known. Here, I will discuss the impact of HHP on various biological systems covering lipidic membranes,...

58. New structures and exotic properties of simple molecular systems under extreme conditions: using neutrons to explore planetary interiors

Livia E. Bove (1)IMPMC, CNRS-UMR 7590, Université P&M Curie, 75252 Paris, France 2) Physics Department, Università di Roma La Sapienza, piazzale Aldo Moro 5, 00196, Roma, Italy 3)LQM, Physics Department, Ecole Politecnique Federale Lausanne, Lausanne, Suisse)

11/05/2026, 13:30

Simple molecular systems—such as water, methane, ammonia, hydrogen, and their mixtures—play a central role across disciplines, from energy storage technologies to condensed matter and planetary physics [1]. They are abundant on Earth, widespread in planetary bodies throughout our solar system, [2] and have even been detected on newly discovered water-rich exoplanets, representing not only a...

38. Gas/liquid interfaces at high pressure: Neutron Imaging, Molecular Dynamics

Ondrej Vopicka (Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czechia)

11/05/2026, 14:00

Talk

The exposure of liquids to pressurized gases induces gas adsorption at the interface, its diffusion into the bulk, and liquid swelling. Neutron imaging of systems from deuterated liquids (hydrocarbons, water) and protium-containing gases (H$_2$, CH$_4$, C$_2$H$_6$) at up to 100 bar and near-ambient temperatures provides interface shape, liquid level, and concentration distribution over time....

64. High-pressure research at the Department of Earth and Planetary Sciences (ETHZ)

Christian Liebske (ETH Zurich)

11/05/2026, 14:20

Talk

The Department of Earth and Planetary Sciences at ETHZ has a nearly 50-year long history in experimental high-pressure projects. Several research groups operate a wide range of instruments, from gas- and solid-media pressure devices to diamond anvil cell systems, covering conditions from hundreds of MPa to hundreds of GPa, while heating to several thousands of Kelvin.

This presentation...

41. Innovations in high pressure neutron scattering at the Spallation Neutron Source

Bianca Haberl (Department of Materials Physics, Research School of Physics, The Australian National University, Canberra, ACT, Australia)

11/05/2026, 15:30

Talk

Recent progress in instrumentation at neutron sources is also enabling innovation in high pressure neutron scattering. Together with pressure cell development, advances are driven by increased neutron flux, improved beam focusing and alignment capabilities. At the Spallation Neutron Source (SNS) of Oak Ridge National Laboratory (ORNL) we use these advances to push the limits in high pressure...

30. High-pressure total scattering using neutrons

Nick Funnell (UKRI - ISIS Neutron and Muon Facility)

11/05/2026, 16:00

Talk

The majority of neutron total scattering experiments have been performed under ambient or variable-temperature conditions whereas comparatively little work has been carried out under high pressure. This is partly a consequence of the difficulties involved in accurately removing non-sample scattering contributions when using devices such as the Paris-Edinburgh press, which are required to...

40. In situ mechanical uniaxial pressure devices for SINQ and SμS facilities at PSI

Tina Arh (PSI - Paul Scherrer Institut)

11/05/2026, 16:20

Talk

Uniaxial pressure is emerging as a powerful experimental tuning parameter for quantum materials that can be employed with various experimental techniques. In recent years, the sample environment capabilities of PSI’s neutron facility SINQ have been enriched by the adoption of the 200 N in situ uniaxial pressure device [1]. Its mechanical transmission rod allows the user to accurately measure...

36. Time-domain Brillouin scattering for 3D-imaging of texture, phase transitions, elastic and plastic properties of solids compressed in a diamond anvil cell

Dr Andreas Zerr (LSPM-CNRS)

11/05/2026, 16:40

Talk

Time-domain Brillouin scattering (TDBS) technique uses ultrafast laser pulses to generate coherent acoustic pulses (CAPs) and monitor their propagation through transparent samples. Local velocity of a CAP along depth of a sample (V_A, where A represents longitudinal (L) or transversal (T) sound velocity) is extracted from oscillating intensity of the probe light scattered by the...

31. Recent advances on the SNAP diffractometer

Christopher Ridley (Oak Ridge National Laboratory)

11/05/2026, 17:00

Talk

The SNAP diffractometer at the Spallation Neutron Source (Oak Ridge, TN) is unique in providing routine access to a diamond anvil cell (DAC)-based neutron diffraction program. These capabilities underpin SNAP’s broader micro-diffraction program, routinely handling sample volumes ranging from 0.03 to 0.3 mm3. This enables neutron diffraction studies of materials across a wide range of extreme...

50. Exploring Quantum Magnets under Large Strain

Elena Gati (Goethe University)

12/05/2026, 09:30

Talk

Quantum magnets host a wide range of collective states that emerge from the interplay of strong correlations, competing interactions, and topology. Identifying and distinguishing these states experimentally requires tuning parameters that can be applied in a precise, controlled and reversible manner.

Uniaxial pressure and strain are particularly promising tuning parameters for quantum...

44. Pressure induced spin liquid state in the anisotropic kagome Y-kapellasite Y3Cu9(OH)19Cl8

Dipranjan Chatterjee (University Of Oxford)

12/05/2026, 10:00

Talk

Y-kapellasite (Y3Cu9(OH)19Cl8) materializes an anisotropic kagome model with 3 different nearest neighbor interactions, yielding a rich phase diagram [1]. Besides two long range ordered phases, this phase diagram features a large spin liquid area, which encompasses the isotropic kagome model. Noticeably the large difference in the Y and Cu radii prevents inter-site mixing and the anisotropic...

35. Decoupling of static and dynamic charge correlations revealed by uniaxial strain in a cuprate superconductor

Leonardo Martinelli (University of Zurich)

12/05/2026, 10:20

Talk

The physics of charge order in high-temperature superconducting cuprates is still largely unexplained. While the formation of one-dimensional charge modulations is a common feature of the two-dimensional Hubbard model, no calculation yet succeeds in reproducing even the basic properties of charge order. Recent experiments revealed the presence of strong quantum fluctuations associated to the...

57. Development of Muon Spin Relaxation Measurement under High Pressure at J-PARC and Application to Study of Organic Magnets

Wataru Higemoto (Advanced Science Research Center, Japan Atomic Energy Agency)

12/05/2026, 10:50

Talk

The muon is a useful elementary particle for probing materials. By using accelerator, spin polarized muons can be implanted into a sample, and depolarization of muon spin is detected at the outside by observing muon decay positron or electron. This technique is known as muon spin rotation, relaxation and resonance (µSR). For µSR measurements, high pressure is also a crucial experimental...

49. Pressure- and strain-enhanced superconducting and normal-state electronic response of kagome LaRu$_{3}$Si$_{2}$

Zurab Guguchia (PSI - Paul Scherrer Institut)

12/05/2026, 11:20

Talk

The interplay between superconductivity and charge or spin order is a key focus in condensed matter physics, with kagome lattice systems providing unique insights. We discovered that the kagome superconductor LaRu$_{3}$Si$_{2}$ ($T_{c}$ = 6.5 K) exhibits a characteristic kagome band structure and a hierarchy of charge-order transitions at 400 K and 80 K, as well as an additional electronic and...

56. THz control of Mott insulators under pressure

Elsa Abreu (ETH Zürich)

12/05/2026, 13:00

Talk

Mott insulators are archetypal examples of quantum materials. Strong interest in these systems has arisen due in part to the insulator-to-metal transition that some exhibit when the balance between on-site Coulomb repulsion and hopping is overturned via temperature, doping, pressure or, as more recently demonstrated, photoexcitation or the application of short electric field pulses. I will...

61. Title to be confirmed

Björn Wehinger

12/05/2026, 13:30

42. Competing Quantum Orders in the Bulk Layered Heterostructure 6R-TaS2

Petr Král (PSI Center for Neutron and Muon Sciences)

12/05/2026, 14:00

Talk

Hydrostatic pressure provides a clean and continuous route to tune competing electronic phases in quantum materials, offering unique insights into the relationship between multiple emergent quantum phenomena. This approach is particularly powerful in layered systems, where pressure directly modifies interlayer coupling and electronic structure without introducing disorder. In this context, the...

55. Pushing electrons uphill: High-pressure routes to transition metal anions

Douglas Henry Fabini (PSI - Paul Scherrer Institut)

12/05/2026, 15:00

Talk

The abilities of the elements to accept or donate electrons and thus adopt various oxidation states are fundamental to bonding and chemical transformations. The discovery in the 1940s of the first compound containing a monatomic metal anion, transparent CsAu with the Au$^-$ ion, upended prior understanding and stimulated new chemistry with reduced 5$d$ transition metals, including the...

52. The role of neutrons in understanding the behaviour of metal oxides at extreme conditions

Craig Bull (ISIS Neutron and Muon Facility)

12/05/2026, 15:30

Talk

Pearl is the dedicated high-pressure diffraction instrument at the ISIS Neutron and Muon Source. Using a series of examples from the user programme the current and developing capabilities of the instrument will be represented. In particular, we will demonstrate the pressure range and quality of different data were able to measure, We will also showcase the technology we are using to provide...

53. High-Pressure Synthesis of Multifunctional Spinels in the Element System Ge-Ga-Cr-O-N

Dr Marcus Schwarz (Freiberg High Pressure Research Centre / Institute for Inorganic Chemistry, TU Bergakademie Freiberg)

12/05/2026, 16:00

Talk

The use of nitride semiconductors such as AlN, GaN and InN for (opto)electronic applications has become paramount in recent years. High-pressure-derived nitrides with direct band gap, e.g. γ-Ge3N4 with spinel-type structure, are currently being explored. Similarly to alredy known ambient- and high pressure forms of the lighter group-4 nitride, Si3N4 and its solid solutions with Al and O, e.g....

33. Comparative High-Pressure Study on Rare-Earth Fluorite-Type Oxides with Increasing Configurational Entropy

Pablo Botella Vives (University of Valencia)

12/05/2026, 16:20

Talk

Rare-earth fluorite-type oxides provide an ideal platform to investigate the role of configurational entropy on structural stability under extreme conditions. In this talk, I will present a comparative high-pressure study of a series of multicationic rare-earth oxides with increasing configurational entropy, ranging from binary systems ((CePr)O₂−δ) to ternary, quaternary ((CePrLaNd)O₂−δ), and...

39. Towards neutron diffraction of high-pressure hydrides

Mads Hansen (University of Cambridge)

12/05/2026, 16:40

Talk

Hydrogen is an elusive atom and detecting it with X-ray diffraction techniques is nearly impossible, especially when it is incorporated in heavy atom matrices, as in many inorganic materials. In high pressure research, using neutrons to probe hydrogen positions is challenging as neutron sources have low flux, relative to synchrotrons, and pressure generation requires small samples. At the same...

32. Equilibrium p-T phase diagram of ZnO

Prof. Vladimir Solozhenko (Centre National de la Recherche Scientifique (CNRS))

12/05/2026, 17:00

Talk

Melting and solid-state phase transitions of wurtzite (w-ZnO) and rocksalt (rs-ZnO) polymorphs of zinc oxide have been studied at pressures to 8 GPa and temperatures to 2500 K using in situ synchrotron X-ray diffraction, electrical resistivity measurements, and quenching experiments.
The equilibrium p-T phase diagram of zinc oxide has been constructed based on experimental data and...

27. Closing Remarks

12/05/2026, 17:50

45. Characterization of Propagation Effects on Terahertz Beam Through Diamond-Anvil Cell for High Pressure Experiments on Quantum Materials

Dimitrios Sapalidis (ETH Zurich), Justas Deveikis (ETH Zurich)

Poster

Quantum materials exhibit strong interactions of electrons in d and f electron shells [1], which result in unique macroscopic properties, such as colossal magnetoresistance [2], superconductivity at high temperature (∼120 K) [3], and they have great potential for ultrafast electronics [4]. Quantum materials are known to exhibit unique phase transitions under external stimuli, such as pressure....

51. Distinct Uniaxial Stress and Pressure Fingerprint of Superconductivity in the 3D Kagome Lattice Compound CeRu2

Orion Gerguri (Universität Zürich)

Poster

The exploration of tunable superconductivity in strongly correlated electron systems is a central pursuit in condensed matter physics, with implications for both fundamental understanding and potential applications. The Laves phase CeRu2, a pyrochlore compound, exhibits a three-dimensional (3D) kagome lattice type geometry giving rise to flat bands and degenerate Dirac points, where band...

28. Overview of High-Pressure Capabilities at SINQ

Gediminas Simutis (PSI - Paul Scherrer Institut)

Poster

Posters and Dinner

We present the current and upcoming high-pressure capabilities at the Swiss Neutron Source.

59. Pressure-Induced Quantum Criticality in Low-Dimensional systems

Kirill Povarov

29. Structural diversity of the elements in wide ranges of pressure and temperature

Holzapfel Wilfried B. (Universität Paderborn)

Poster

The periodic table of the elements with colored phase-diagrams will be used to discuss the systematics and the physical background together with material for future seminars.

37. Terahertz time-domain spectroscopy of quantum materials under high pressure in a diamond anvil cell

Zia Macdermid (ETH Zurich)

Poster

We present a new method for performing equilibrium and time-resolved terahertz spectroscopy of quantum materials while continuously tuning temperature and pressure conditions [1]. These tuneable parameters allow precise control of the sample ground state and investigation of excited states reached with an optical pump. The technique combines a broadband THz time-domain spectroscopy system...

60. title TBA

Christian Liebske (ETHZ)

54. Towards smarter high pressure cells: Integrated pressure calibration for individual heated multianvil experiments

Marcus Schwarz (Freiberg High Pressure Research Centre / Institute for Inorganic Chemistry, TU Bergakademie Freiberg)

Poster

Despite the impressive developments in the
application of large volume presses at synchrotron
facilities that are catching up with the long-established
diamond anvil cell technique (DAC) for in-situ studies,
still the vast majority of multianvil high pressure
experiments (MAE) is and will be further performed at
in-house facilities without any access to in-situ
characterization based on...