Search Results

You searched for all publications:

with publication states 'Published (Approved)'
with Tags 'Physics'

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

Exact matches
Related results

3,992 items found (0 items not approved), displaying 1 to 10.[First/Prev] 1, 2, 3, 4, 5, 6, 7, 8 [Next/Last]

Instruments / Technical Area	Publication Details	Published
DIAD-Dual Imaging and Diffraction Beamline I12-JEEP: Joint Engineering, Environmental and Processing	X-ray simulations with gVXR in education, digital twining, experiment planning, and data analysis Franck P. Vidal , Shaghayegh Afshari , Sharif Ahmed , Alberto Albiol , Francisco Albiol , Éric Béchet , Alberto Corbí Bellot , Stefan Bosse , Simon Burkhard , Younes Chahid , Cheng-Ying Chou , Robert Culver , Pascal Desbarats , Lewis Dixon , Johan Friemann , Amin Garbout , Marcos García-Lorenzo , Jean-François Giovannelli , Ross Hanna , Clémentine Hatton , Audrey Henry , Graham Kelly , Christophe Leblanc , Alberto Leonardi , Jean Michel Létang , Harry Lipscomb , Tristan Manchester , Bas Meere , Claire Michelet , Simon Middleburgh , Radu P. Mihail , Iwan Mitchell , Liam Perera , Martí Puig , Malek Racy , Ali Rouwane , Hervé Seznec , Aaron Sújar , Jenna Tugwell-Allsup , Pierre-Frédéric Villard Nuclear Instruments And Methods In Physics Research Section B: Beam Interactions With Materials And Atoms 568 DOI: 10.1016/j.nimb.2025.165804 Diamond Proposal Number(s): [29820] Open Access Show Abstract ▼ Abstract: gVirtualXray (gVXR) is an open-source framework that relies on the Beer–Lambert law to simulate X-ray images in real time on a graphics processor unit (GPU) using triangular meshes. A wide range of programming languages is supported (C/C++, Python, R, Ruby, Tcl, C#, Java, and GNU Octave). Simulations generated with gVXR have been benchmarked with clinically realistic phantoms (i.e. complex structures and materials) using Monte Carlo (MC) simulations, real radiographs and real digitally reconstructed radiographs (DRRs), and X-ray computed tomography (XCT). It has been used in a wide range of applications, including real-time medical simulators, proposing a new densitometric radiographic modality in clinical imaging, studying noise removal techniques in fluoroscopy, teaching particle physics and X-ray imaging to undergraduate students in engineering, and XCT to masters students, predicting image quality and artifacts in material science, etc. gVXR has also been used to produce a high number of realistic simulated images in optimisation problems and to train machine learning algorithms. This paper presents a comprehensive review of such applications of gVXR.	Nov 2025
I16-Materials and Magnetism	Evidence of rotational and tilting disorder of ReO6 octahedra in single crystals of a 5d1 double perovskite Ba2CaReO6 Alasdair Nicholls , Jian-Rui Soh , Yikai Yang , Alessandro Bombardi , Daigorou Hirai , Henrik M. Ronnow , Ivica Zivkovic Journal Of Magnetism And Magnetic Materials 632 DOI: 10.1016/j.jmmm.2025.173516 Diamond Proposal Number(s): [34820] Open Access Show Abstract ▼ Abstract: We present results of an experimental study on single crystals of a 5d double perovskite Ba2CaReO6. Magnetization measurements reveal a weak splitting between zero-field-cooled and field-cooled protocols below 12 K. At magnetic fields above 1 T the splitting is absent and the magnetic susceptibility is featureless. A detailed specific heat study in a wide temperature range and comprising different heat pulses did not reveal any indication of a thermodynamic phase transition. At low temperatures we do observe specific heat deviating from a phonon background, leading to a total electronic entropy release of . Resonant and non-resonant x-ray diffraction of characteristic Bragg peaks indicates a significant presence of disorder, potentially related to random tilts and rotations of rigid ReO6 octahedra.	Nov 2025
	Emergence of pseudoresonance in high-intensity resonant inelastic x-ray scattering Sang-Kil Son , Thomas M. Baumann , Jacob Pedersen , Laura Budewig , Kai Li , Hans Ågren , Olle Björneholm , Rebecca Boll , John Bozek , Carl Caleman , Sebastian Cardoch , Lucas M. Cornetta , Alberto De Fanis , Emiliano De Santis , Simon Dold , Gilles Doumy , Ulrich Eichmann , Xiaochun Gong , Johan Gråsjö , Alice E. Green , Iyas Ismail , Ludvig Kjellsson , Eva Lindroth , Tommaso Mazza , Jacobo Montaño , Terry Mullins , Christian Ott , Yevheniy Ovcharenko , Thomas Pfeifer , Maria Novella Piancastelli , Ralph Püttner , Nils Rennhack , Nina Rohringer , Cecilia Sanchez-Hanke , Conny Såthe , Philipp Schmidt , Björn Senfftleben , Marc Simon , Nicuşor Tîmneanu , Moto Togawa , Kiyoshi Ueda , Sergey Usenko , Hans Jakob Wörner , Weiqing Xu , Zhong Yin , Linda Young , Joseph Nordgren , Marcus Agåker , Johan Söderström , Sonia Corian , Michael Meyer , Robin Santra , Jan-Erik Rubensson Physical Review A 112 DOI: 10.1103/drmh-vmgk Open Access Show Abstract ▼ Abstract: We report resonant inelastic x-ray scattering (RIXS) spectra of neon atoms interacting with intense x-ray pulses generated using an x-ray free-electron laser (XFEL). We find that an unexpected peak emerges near the 𝐾⁢𝛼 line of Ne, which does not coincide with any physical resonances of neon ions. We perform theoretical calculations based on a quantum-state-resolved rate-equation approach with x-ray-induced processes including possible resonant excitations. Our dynamics simulations demonstrate that a sequence of multiple resonant photoabsorption events are involved and the interplay of those multiple resonances in combination with the relatively large spectral bandwidth of XFEL radiation leads to the emergent resonance-like structure at a position where no resonances exist. Our finding offers critical guidance for future applications of high-intensity RIXS at XFEL facilities.	Nov 2025
B23-Circular Dichroism	Chiral supramolecular assembly to enhance the magneto-optical rotation of organic materials Leo Delage-Laurin , David Reger , Abdusalom A. Suleymanov , Zachary Nelson , Louis Minion , Steven Kooi , Jochen R. Brandt , Giuliano Siligardi , Robert P. Cameron , Jessica Wade , Timothy M. Swager , Matthew J. Fuchter Nature Communications 16 DOI: 10.1038/s41467-025-64663-w Diamond Proposal Number(s): [29153, 31975, 33533] Open Access Show Abstract ▼ Abstract: Connections between magnetic field induced optical activity and chirality have a rich and complicated history. Although the broken inversion symmetry of chiral molecules generates ‘natural’ optical activity, magnetic optical activity is generated by breaking time reversal symmetry. Therefore, molecular chirality is not expected to influence magnetic optical phenomena, such as Faraday rotation. Here we show that the chiral supramolecular assembly of polymers can result in large Faraday effects (Verdet constants = 105 °T–1m–1). This strong Faraday rotation, which is amongst the highest value known for organic materials, originates from the so-called Faraday B term. Typically, B term Faraday responses are weak. We demonstrate large amplification through excitonic coupling within the supramolecular assembly, where the chirality of the system controls the assembly formed. These observations provide an alternative means to enhance the Faraday rotation of low symmetry systems and clarify the role of chirality in previous reported materials.	Nov 2025
I21-Resonant Inelastic X-ray Scattering (RIXS)	Circular dichroism in resonant inelastic x-ray scattering: probing altermagnetic domains in MnTe D. Takegami , T. Aoyama , T. Okauchi , T. Yamaguchi , S. Tippireddy , S. Agrestini , Mirian Garcia-Fernandez , T. Mizokawa , K. Ohgushi , Ke-Jin Zhou , J. Chaloupka , J. Kuneš , A. Hariki , H. Suzuki Physical Review Letters 135 DOI: 10.1103/512v-n5f9 Open Access Show Abstract ▼ Abstract: X-ray magnetic circular dichroism provides a means to identify ferromagnetic, chiral, and altermagnetic orders via their time-reversal-symmetry (𝒯) breaking. However, the symmetry properties that govern circular dichroism (CD) in resonant inelastic x-ray scattering (RIXS) remain poorly understood. We show that, due to the inherent irreversibility of the RIXS process, RIXS-CD does not require 𝒯 breaking to be present, but reflects the change in unitary symmetries associated with magnetic ordering. Using the altermagnetic MnTe as a model system, we observe an azimuthal-angle dependent RIXS-CD signal in the magnon excitations. Our findings highlight the sensitivity of RIXS-CD to the relativistic symmetry in magnetic systems and its potential application as a probe of magnetic domains.	Nov 2025
Optics	Structure, stress, and optical property correlations in nano-structured Mo/Si and W/B4C multilayer mirrors for hard x-ray applications Faiyaz Mollick , Maheswar Nayak , Ajay Kumar Kashyap , Jitendra Kumar , Arindam Majhi , Nageswararao Pothana , Parasmani Rajput , Manoj Kumar Tiwari , Sanjay Kumar Rai , Manvendra Narayan Singh , Archna Sagdeo Journal Of Applied Physics 138 DOI: 10.1063/5.0291236 Open Access Show Abstract ▼ Abstract: The comprehensive structure, stress, and optical property correlation of high performance x-ray multilayer (ML) mirrors based on Mo/Si and W/B4C material systems is systematically investigated for hard x-ray applications in the 10–20 keV range. All MLs are deposited by magnetron sputtering with carefully tuned periodicities and number of layer pairs to optimize for either high photon flux or high spectral resolution. Structural properties are probed using x-ray reflectivity and diffuse scattering, while residual stress and crystallite characteristics of metallic layer are analyzed by grazing incidence x-ray diffraction. The Mo/Si MLs, with relatively large periods (∼6.53 and 9.43 nm), exhibit interlayer formation and demonstrate high reflectivity up to ∼92% along with very high integrated reflectivity, making them suitable for high-flux applications. In contrast, short and ultra-short period (∼3.74 and 1.85 nm) W/B4C MLs show sharp interfaces, supporting their use in high-resolution optics with relative energy resolution down to ∼1.2%.	Nov 2025
B16-Test Beamline	Characterisation and quantification of the ‘Excess-Leakage-Current’ effect in Redlen HF-CdZnTe at > 106 ph s-1 mm-2 B. Cline , D. Banks , M. Bishop , A. Davis , J. Harris , M. Hart , S. Knowles , T. Nicholls , J. Nobes , S. Pradeep , M. Roberts , M. C. Veale , M. D. Wilson , V. P. Dhamgaye , O. J. L. Fox , K. J. S. Sawhney , S. Scully Journal Of Instrumentation 20 DOI: 10.1088/1748-0221/20/10/P10021 Diamond Proposal Number(s): [36472] Open Access Show Abstract ▼ Abstract: In this paper, results are presented from the characterisation of a 2 mm thick Redlen Technologies high-flux-capable Cadmium Zinc Telluride (HF-CZT) sensor hybridised to the small-pixel, spectroscopic-imaging HEXITEC_MHz ASIC. Dynamic datasets were taken on the B16 Test Beamline at the Diamond Light Source to study a previously-identified 'excess-leakage-current' phenomenon in HF-CZT, where additional leakage current was temporarily generated upon the application of an X-ray flux. A study of the response of the detector as a function of X-ray intensity demonstrated a measurable excess leakage current signal above 105 ph s-1 mm-2. At a 20 keV flux of 7.81 × 106 ph s-1 mm-2, this effect contributed a signal equivalent to 3.79 ± 1.59 nA mm-2in addition to the expected photocurrent. On removal of X-rays at this flux, this excess leakage current took ∼ 10 s to decay below the noise floor of the detector. This long lifetime has implications for detectors required to operate at high frame rates and fluxes. The use of a small-pixel detector also allowed the spatial variation of this effect to be studied. A per-pixel comparison between the magnitude of the excess leakage current and the spectroscopic performance of the pixel showed no correlation. This suggests that the phenomenon is less likely to be a bulk-crystal effect and more likely the result of the properties of the CZT surface or metal/semiconductor interface. An Arrhenius analysis of the temperature-dependence of the dark and excess leakage currents in the detector yielded values of 0.69 ± 0.04 eV and 0.13 ± 0.01 eV respectively. The change in dark current with temperature is consistent with deep levels pinning the Fermi level close to the mid band gap, whilst the activation energy of the excess leakage current suggests shallower defects at the metal-semiconductor interface are responsible.	Oct 2025
I05-ARPES	Metal-insulator transition driven by the interplay of vacancies and charge orders in square-net materials GdSbxTe2-x-δ Qun Wang , Yifang Jiang , Songyuan Geng , Hanpu Liang , Yunbo Wu , Risi Guo , Fangjie Chen , Kangjie Li , Xin Wang , Bin Cao , Keyu An , Shengtao Cui , Zhe Sun , Mao Ye , Zhengtai Liu , Changming Yue , Shiming Lei , Haoxiang Li Advanced Materials 39 DOI: 10.1002/adma.202510303 Show Abstract ▼ Abstract: Engineering narrow-bandgap semiconductors remains a pivotal challenge for next-generation electronic and energy devices. Charge density wave (CDW) systems offer a promising platform for bandgap engineering. However, most 2D and 3D CDW systems remain metallic despite exhibiting Fermi surface nesting. Here, a doping-dependent metal-insulator transition (MIT) with tunable bandgaps is reported in square-net materials GdSbxTe2-x-δ and a cooperative interaction between CDWs and vacancies that drives the MIT is discovered. Angle-resolved photoemission spectroscopy (ARPES) reveals the MIT in the low Sb-content regime of GdSbxTe2-x-δ, with a maximum energy gap of Δ ≈ 98 meV at x = 0.16, corroborated by electrical transport measurements. Following the MIT, X-ray diffraction reveals a doping-dependent shift of the CDW wavevector toward a commensurate structure with q = 0.25 a*, concurrent with the appearance of Te vacancies in the square-net layers. Density functional theory (DFT) calculations attribute the gap formation to the ordered Te vacancies modulated by the 4×1×1 CDW superstructure, which suppresses the electronic states near the Fermi level. Contrasting with the partial gap scenarios in conventional CDW systems, this synergy between the CDW and the vacancy stabilizes the insulating phase, offering a distinct avenue for narrow bandgap engineering in electronic materials.	Oct 2025
I09-Surface and Interface Structural Analysis	Determining the band alignment at the (010)-oriented β-(Al𝑥Ga1−𝑥)2O3/Ga2O3 interface using hard x-ray photoemission spectroscopy and ab initio calculations Wenjing Xu , Hailing Guo , Zhenni Yang , Yihong Chen , Xiangyu Xu , Tien-Lin Lee , Duanyang Chen , Xinxin Yu , Yuzheng Guo , Zhaofu Zhang , Hongji Qi , Kelvin H. I. Zhang Physical Review Applied 24 DOI: 10.1103/255q-v9k4 Diamond Proposal Number(s): [37428] Show Abstract ▼ Abstract: In this work, we investigate the electronic structure and interfacial band alignment of β-(Al𝑥⁢Ga1−𝑥)2⁢O3/Ga2⁢O3 heterojunctions using a combination of synchrotron-based hard x-ray photoemission spectroscopy (HAXPES) and first-principles hybrid density functional theory calculations. β-(Al𝑥⁢Ga1−𝑥)2⁢O3 films with Al compositions of x = 0.12, 0.19, and 0.29 were grown on Fe-doped β-Ga2⁢O3 (010) substrates via pulsed laser deposition. The band gap of β-(Al𝑥⁢Ga1−𝑥)2⁢O3 increases from (4.83 ± 0.05) eV (x = 0) to (5.37 ± 0.08) eV (x = 0.29), primarily driven by an upward shift of the conduction band edge due to hybridization between Al 3s and Ga 4s states, while the valence band edge exhibits a slight downward shift. Both experimental HAXPES data and theoretical calculations confirmed the formation of a “type I” (straddling) band alignment in the β-(Al𝑥⁢Ga1−𝑥)2⁢O3/Ga2⁢O3 heterojunctions. For instance, at x = 0.29, the conduction band offset and valence band offset are approximately 0.33 and 0.21 eV, respectively. These findings provide valuable insights for designing modulation-doped β-(Al𝑥⁢Ga1−𝑥)2⁢O3/Ga2⁢O3 heterostructures, enabling the realization of a two-dimensional electron gas and its application in high-frequency electronic devices.	Oct 2025
I11-High Resolution Powder Diffraction	Control of magnetism via B-site order and disorder in Y2NiTiO6 perovskite Nataliya L. Gulay , Hai Lin , Anna Krowitz , Manel Sonni , Troy D. Manning , Luke M. Daniels , Matthew S. Dyer , John B. Claridge , Matthew J. Rosseinsky Inorganic Chemistry DOI: 10.1021/acs.inorgchem.5c03186 Open Access Show Abstract ▼ Abstract: The first reported phase in the Y2O3–NiO–TiO2 chemical space, the Y2NiTiO6 perovskite undergoes a temperature-induced order–disorder transition. Above ∼1700 K, it adopts the structure of a disordered CaTiO3-type orthorhombic perovskite with a = 5.26939(2), b = 5.60367(2), and c = 7.58137(3) Å, with the B site uniformly occupied by 0.5Ni+0.5Ti. Below this temperature, Y2NiTiO6 adopts rock-salt ordering of the transition metals in a monoclinic unit cell (a = 5.26695(2), b = 5.60164(2), c = 7.57493(2) Å, β = 90.4940(2)°) with 0.9/0.1 ordering of the B site. Ordering of Ni and Ti changes the magnetic properties from spin-glass behavior in the orthorhombic phase to antiferromagnetic order (TN = 17 K) for the monoclinic phase, while the optical properties of both phases remain unchanged across the transition.	Oct 2025

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User