Publications de Martin Mansson

Confirming the high pressure phase diagram of the Shastry-Sutherland model

A Muon Spin Rotation (mu+SR) study was conducted to investigate the magnetic properties of SrCu2(BO3)(2) (SCBO) as a function of temperature/pressure. Measurements in zero field and transverse field confirm the absence of long range magnetic order at high ...

IOP PUBLISHING LTD2023

Tomonaga-Luttinger Liquid Spin Dynamics in the Quasi-One-Dimensional Ising-Like Antiferromagnet BaCo2V2O8

Thierry Giamarchi, Martin Mansson, Jonathan White, Gregory Scott Tucker, Christian Rüegg

Combining inelastic neutron scattering and numerical simulations, we study the quasi-one-dimensional Ising anisotropic quantum antiferromagnet BaCo2V2O8 in a longitudinal magnetic field. This material shows a quantum phase transition from a Neel ordered ph ...

AMER PHYSICAL SOC2019

Direct observation of orbital hybridisation in a cuprate superconductor

Martin Mansson, Johan Juul Chang, Claudia Giuseppina Fatuzzo, Thorsten Schmitt

Nature Publishing Group2018

Dimensional Reduction in Quantum Dipolar Antiferromagnets

Henrik Moodysson Rønnow, Martin Mansson, Ivan Kovacevic, Peter Babkevich

We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF4. For the thermal transition, the order-parameter critical exponent is found to be 0.20(1) and the specific-heat critical exponent -0 ...

2016

Origin of the Spin-Orbital Liquid State in a Nearly J=0 Iridate Ba3ZnIr2O9

Henrik Moodysson Rønnow, Martin Mansson, Paul Gregory Freeman

We show using detailed magnetic and thermodynamic studies and theoretical calculations that the ground state of Ba3ZnIr2O9 is a realization of a novel spin-orbital liquid state. Our results reveal that Ba3ZnIr2O9 with Ir5+ (5d(4)) ions and strong spin-orbi ...

2016

Electron scattering, charge order, and pseudogap physics in La1.6-xNd0.4SrxCuO4: An angle-resolved photoemission spectroscopy study

Marco Grioni, Joël Mesot, Elia Razzoli, Martin Mansson, Johan Juul Chang, Sara Fatale, Claudia Giuseppina Fatuzzo

We report an angle-resolved photoemission study of the charge stripe ordered La1.6-xNd0.4SrxCuO4 (Nd-LSCO) system. A comparative and quantitative line-shape analysis is presented as the system evolves from the overdoped regime into the charge ordered phase ...

Amer Physical Soc2015

Dynamics across the structural transitions at elevated temperatures in Na0.7CoO2

Martin Mansson

The layered transition-metal oxide Nax CoO2 has been studied extensively both for its correlated electronic properties as well as for potential battery applications. It was discovered that high-temperature Na ion vacancy order and dynamics can be very usef ...

E D P Sciences2015

Probing two- and three-dimensional electrons in MgB2 with soft x-ray angle-resolved photoemission

Martin Mansson, Thorsten Schmitt

electronic band structure of MgB2 involves a unique combination of two-and three-dimensional (3D) electrons derived from the boron sigma and pi states, respectively. We have mapped out the sigma and pi bands over the complete Brillouin zone, including the ...

Amer Physical Soc2015

Magnetic order in the 2D Heavy-Fermion system CePt2In7 studied by mu+SR

Marco Grioni, Krunoslav Prsa, Martin Mansson, Kamil Sedlák

The low-temperature microscopic magnetic properties of the quasi-2D heavy-fermion compound, CePt2In7 are investigated by using a positive muon-spin rotation and relaxation (mu+SR) technique. Clear evidence for the formation of a commensurate antiferromagne ...

Iop Publishing Ltd2014

Spin-Nematic Interaction in the Multiferroic Compound Ba2CoGe2O7

Martin Mansson

We demonstrate the existence of the spin-nematic interactions in an easy-plane type antiferromagnet Ba2CoGe2O7 by exploring the magnetic anisotropy and spin dynamics. The combination of neutron scattering and magnetic susceptibility measurements reveals th ...

American Physical Society2014

Lithium diffusive behavior in Li2MnO3 detected by muon-spin relaxation

Martin Mansson

In a paramagnetic state of Li2MnO3, i.e. at temperatures above T-N = 35 K, muon-spin relaxation (mu+SR) measurements with zero applied magnetic field (ZF) and longitudinal-field (LF) revealed the presence of a dynamic fluctuation of a nuclear magnetic fiel ...

Elsevier Science Bv2014

Lineshape of the singlet-triplet excitations in the dimer system Sr3Cr2O8 to first order in the high-density 1/z expansion

Martin Mansson

The Cr5+ ions in Sr3Cr2O8 constitute a strongly correlated spin-1/2 dimer system. Experiments show that the collective singlet-triplet excitations in this system are well defined in the zero-temperature limit, but, when heated, the inelastic neutron scatte ...

American Physical Society2014

Hidden magnetic order in Sr2VO4 clarified with mu+SR

Martin Mansson

In order to elucidate the magnetic ground state of Sr2VO4, we have measured muon spin rotation and relaxation (mu+SR) spectra of a powder sample in the temperature range between 1.8 and 140 K. As a result, we have clarified that the transition at 105 K is ...

American Physical Society2014

Prismatic analyser concept for neutron spectrometers

Henrik Moodysson Rønnow, Martin Mansson, Paul Gregory Freeman

Developments in modern neutron spectroscopy have led to typical sample sizes decreasing from few cm to several mm in diameter samples. We demonstrate how small samples together with the right choice of analyser and detector components makes distance collim ...

American Institute of Physics2014

Na-ion dynamics in Quasi-1D compound NaV2O4

Martin Mansson

We have used the pulsed muon source at ISIS to study high-temperature Na-ion dynamics in the quasi-one-dimensional (Q1D) metallic antiferromagnet NaV2O4. By performing systematic zero-field and longitudinal-field measurements as a function of temperature w ...

Iop Publishing Ltd2014

Lithium Diffusion & Magnetism in Battery Cathode Material LixNi1/3Co1/3Mn1/3O2

Krunoslav Prsa, Martin Mansson, Kamil Sedlák

We have studied low-temperature magnetic properties as well as high-temperature lithium ion diffusion in the battery cathode materials LixNi1/3Co1/3Mn1/1O2 by the use of muon spin rotation/relaxation. Our data reveal that the samples enter into a 2D spin-g ...

Iop Publishing Ltd2014

The gradient distribution of Ni ions in cation-disordered Li[Ni1/2Mn3/2]O-4 clarified by muon-spin rotation and relaxation (mu SR)

Martin Mansson

Cation-ordered Li[Ni1/2Mn3/2]O-4 with a P4(3)32 space group (CO-LNMO) and "cation-disordered'' (CDO) LNMO are thought to be the state-of-the-art materials for lithium-ion batteries. However, in contrast to CO-LNMO, the crystal structure and electrochemical ...

RSC Publishing2013

Muon-spin relaxation study on Li- and Na-diffusion in solids

Martin Mansson

Solid state diffusion is a very complex mechanism and, up until recent studies, such properties had mainly been conducted by macroscopic methods that do not yield true material properties. This has been a major problem for materials development regarding e ...

Iop Publishing Ltd2013

Ortho-II band folding in YBa2Cu3O7-delta films revealed by angle-resolved photoemission

Joël Mesot, Elia Razzoli, Martin Mansson

We present an angle-resolved photoelectron spectroscopy study of YBa2Cu3O7-delta films in situ grown by pulsed laser deposition. We have successfully produced underdoped surfaces with ordered oxygen vacancies within the CuO chains resulting in a clear orth ...

2011

A spin- and angle-resolving photoelectron spectrometer

Martin Mansson

A new type of hemispherical electron energy analyzer that permits angle and spin resolved photoelectron spectroscopy has been developed. The analyzer permits standard angle resolved spectra to be recorded with a two-dimensional detector in parallel with sp ...

2010