Publications related to Classical and Quantum Critical Phenomena in the Dipolar Antiferromagnet LiErF4

Spin dynamics of coupled spin ladders near quantum criticality in Ba2CuTeO6

We report inelastic neutron scattering measurements of the magnetic excitations in Ba2CuTeO6, proposed by ab initio calculations to magnetically realize weakly coupled antiferromagnetic two-leg spin-1/2 ladders. Isolated ladders are expected to have a sing ...

2018

Quantum critical scaling

The study of quantum matter has become a great part of modern physics research. Quantum criticality appears in the vicinity of a quantum critical point where there is an interplay between quantum and thermal fluctuations. In the quantum critical region, ’e ...

2018

Non-Abelian chiral spin liquid in a quantum antiferromagnet revealed by an iPEPS study

Abelian and non-Abelian topological phases exhibiting protected chiral edge modes are ubiquitous in the realm of the fractional quantum Hall (FQH) effect. Here, we investigate a spin-1 Hamiltonian on the square lattice which could, potentially, host the sp ...

2018

Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet

Henrik Moodysson Rønnow, Jonathan White

Magnetic skyrmions are vortex-like topological spin textures often observed to form a triangular-lattice skyrmion crystal in structurally chiral magnets with the Dzyaloshinskii-Moriya interaction. Recently, beta-Mn structure-type Co-Zn-Mn alloys were ident ...

AMER ASSOC ADVANCEMENT SCIENCE2018

Crystallography and substitution patterns in the ZrO2−YTaO4 system

Anirudh Raju Natarajan

Cation ordering is expected to influence the properties of oxides in the ZrO2−YTaO4 system, but the ordering patterns and their relative energies are not well understood. This work investigates the stability of zirconium-yttrium-tantalum orderings over the ...

APS2018

Neutron spectroscopy in the layered quantum magnet SrCu₂(BO₃)₂ and in transition metal phosphorus trisulfides (MPS₃)

Diane Virginie Marie Lançon

Collective magnetic excitations are a fascinating aspect of condensed matter physics, where neutron scattering can provide valuable insight into the magnetic properties of physical realisations of model systems. This thesis focuses on the excitation spectr ...

EPFL2017

Dimerization and exotic criticality in spin-S chains

Natalia Chepiga

In this thesis we have studied the emergence of spontaneously dimerized phases in frustrated spin-S chains, with emphasis on the nature of the critical lines between the dimerized and non-dimerized phases. The main numerical method used in this thesis is t ...

EPFL2017

J1−J2 square-lattice Heisenberg antiferromagnets with 4d1 spins: AMoOPO4Cl (A=K,Rb)

Henrik Moodysson Rønnow, Peter Babkevich

Magnetic properties of AMoOPO4Cl (A=K,Rb) with Mo5+ ions in the 4d1 electronic configuration are investigated by magnetization, heat capacity, and nuclear magnetic resonance (NMR) measurements on single crystals, combined with powder neutron diffraction ex ...

2017

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

Lin Yang

In this thesis I study the synthesis and basic physical properties characterization on 3

d

, 4

d

and 5

d

transition metal compounds. Great success has been obtained in 3

d

transition metal compounds, in which the electric states are well localized due t ...

EPFL2017

Coherent generation of symmetry-forbidden phonons by light-induced electron-phonon interactions in magnetite

Oleg Yazyev, Fabrizio Carbone, Frank van Mourik, Christopher Alexander Arrell, Edoardo Baldini, Andreas Helmut Christian Mann, Simone Borroni

Symmetry breaking across phase transitions often causes changes in selection rules and emergence of optical modes which can be detected via spectroscopic techniques or generated coherently in pump-probe experiments. In second-order or weakly first-order tr ...

Amer Physical Soc2017

Classical and Quantum Critical Phenomena in the Dipolar Antiferromagnet LiErF4

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Spin dynamics of coupled spin ladders near quantum criticality in Ba2CuTeO6

Quantum critical scaling

Non-Abelian chiral spin liquid in a quantum antiferromagnet revealed by an iPEPS study

Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet

Crystallography and substitution patterns in the ZrO2−YTaO4 system

Neutron spectroscopy in the layered quantum magnet SrCu₂(BO₃)₂ and in transition metal phosphorus trisulfides (MPS₃)

Dimerization and exotic criticality in spin-S chains

J1−J2 square-lattice Heisenberg antiferromagnets with 4d1 spins: AMoOPO4Cl (A=K,Rb)

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

Coherent generation of symmetry-forbidden phonons by light-induced electron-phonon interactions in magnetite

Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet

Crystallography and substitution patterns in the ZrO2−YTaO4 system

Neutron spectroscopy in the layered quantum magnet SrCu₂(BO₃)₂ and in transition metal phosphorus trisulfides (MPS₃)

J1−J2 square-lattice Heisenberg antiferromagnets with 4d1 spins: AMoOPO4Cl (A=K,Rb)

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

Spin dynamics of coupled spin ladders near quantum criticality in Ba2CuTeO6

Quantum critical scaling

Non-Abelian chiral spin liquid in a quantum antiferromagnet revealed by an iPEPS study

Dimerization and exotic criticality in spin-S chains

Coherent generation of symmetry-forbidden phonons by light-induced electron-phonon interactions in magnetite