Scientific Highlights Titel Datum Year Year201920182017201620152014201320122011201020092008 Month MonthJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember 15 July 2019 Experimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore A quantum spin liquid is a state of matter where unpaired electrons’ spins, although entangled, do not show magnetic order even at the zero temperature. The realization of a quantum spin liquid is a long-sought goal in condensed-matter physics. 21 June 2019 Critical fields of Nb3Sn prepared for superconducting cavities Nb3Sn is currently the most promising material other than niobium for future superconducting radiofrequency cavities. Critical fields above 120 mT in pulsed operation and about 80 mT in CW have been achieved in cavity tests. This is large compared to the lower critical field as derived from the London penetration depth, extracted from low field surface impedance measurements. 5 June 2019 Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint A method to measure the superconducting (SC) stiffness tensor ρs, without subjecting the sample to external magnetic field, is applied to La1.875Sr0.125CuO4. The method is based on the London equation J=-ρsA, where J is the current density and A is the vector potential which is applied in the SC state. 27 May 2019 Kondo screening in a charge-insulating spinon metal The Kondo effect, an eminent manifestation of many-body physics in condensed matter, is traditionally explained as exchange scattering of conduction electrons on a spinful impurity in a metal. The resulting screening of the impurity's local moment by the electron Fermi sea is characterized by a Kondo temperature TK, below which the system enters a strongly coupled regime. 3 May 2019 Elementary excitation in the spin-stripe phase in quantum chains Elementary excitations in condensed matter capture the complex many-body dynamics of interacting basic entities in a simple quasiparticle picture. In magnetic systems the most established quasiparticles are magnons, collective excitations that reside in ordered spin structures, and spinons, their fractional counterparts that emerge in disordered, yet correlated spin states. 26 April 2019 Exotic Low-Energy Excitations Emergent in the Random Kitaev Magnet Cu2IrO3 We report on magnetization M(H), dc and ac magnetic susceptibility Χ(T), specific heat Cm(T) and muon spin relaxation (μSR) measurements of the Kitaev honeycomb iridate Cu2IrO3 with quenched disorder. In spite of the chemical disorders, we find no indication of spin glass down to 260 mK from the Cm(T) and μSR data. 18 February 2019 Negative flat band magnetism in a spin–orbit-coupled correlated kagome magnet Electronic systems with flat bands are predicted to be a fertile ground for hosting emergent phenomena including unconven- tional magnetism and superconductivity, but materials that manifest this feature are rare. Here, we use scanning tunnelling microscopy to elucidate the atomically resolved electronic states and their magnetic response in the kagome magnet Co3Sn2S2. 18 January 2019 Search for the Magnetic Monopole at a Magnetoelectric Surface We show, by solving Maxwell’s equations, that an electric charge on the surface of a slab of a linear magnetoelectric material generates an image magnetic monopole below the surface provided that the magnetoelectric has a diagonal component in its magnetoelectric response. The image monopole, in turn, generates an ideal monopolar magnetic field outside of the slab. 21 December 2018 Magnetism in semiconducting molybdenum dichalcogenides Transition metal dichalcogenides (TMDs) are interesting for understanding the fundamental physics of two-dimensional (2D) materials as well as for applications to many emerging technologies, including spin electronics. 1 2 3 4 5 6 7 Next page ›› Last page Last » older than 2015 Sidebar LMU and Groups Laboratory for Muon Spin Spectroscopy (LMU) Low-Energy Muons Group Bulk-µSR Group SμS Facility Instruments Beamlines User Services LMU Intranet Call for Proposals Next Deadline: December, 2019 User Office Provides all information about user research at PSI Large Research Facilities PSI User Facilities Newsletter Current News from PSI photon, neutron and muon user facilities NUM Homepage PSI Division Research with Neutrons and Muons. MuonSources.org MuonSources.org provides information about muon facilities and muon research worldwide. ISMS The International Society for µSR Spectroscopy (ISMS).
15 July 2019 Experimental signatures of a three-dimensional quantum spin liquid in effective spin-1/2 Ce2Zr2O7 pyrochlore A quantum spin liquid is a state of matter where unpaired electrons’ spins, although entangled, do not show magnetic order even at the zero temperature. The realization of a quantum spin liquid is a long-sought goal in condensed-matter physics.
21 June 2019 Critical fields of Nb3Sn prepared for superconducting cavities Nb3Sn is currently the most promising material other than niobium for future superconducting radiofrequency cavities. Critical fields above 120 mT in pulsed operation and about 80 mT in CW have been achieved in cavity tests. This is large compared to the lower critical field as derived from the London penetration depth, extracted from low field surface impedance measurements.
5 June 2019 Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint A method to measure the superconducting (SC) stiffness tensor ρs, without subjecting the sample to external magnetic field, is applied to La1.875Sr0.125CuO4. The method is based on the London equation J=-ρsA, where J is the current density and A is the vector potential which is applied in the SC state.
27 May 2019 Kondo screening in a charge-insulating spinon metal The Kondo effect, an eminent manifestation of many-body physics in condensed matter, is traditionally explained as exchange scattering of conduction electrons on a spinful impurity in a metal. The resulting screening of the impurity's local moment by the electron Fermi sea is characterized by a Kondo temperature TK, below which the system enters a strongly coupled regime.
3 May 2019 Elementary excitation in the spin-stripe phase in quantum chains Elementary excitations in condensed matter capture the complex many-body dynamics of interacting basic entities in a simple quasiparticle picture. In magnetic systems the most established quasiparticles are magnons, collective excitations that reside in ordered spin structures, and spinons, their fractional counterparts that emerge in disordered, yet correlated spin states.
26 April 2019 Exotic Low-Energy Excitations Emergent in the Random Kitaev Magnet Cu2IrO3 We report on magnetization M(H), dc and ac magnetic susceptibility Χ(T), specific heat Cm(T) and muon spin relaxation (μSR) measurements of the Kitaev honeycomb iridate Cu2IrO3 with quenched disorder. In spite of the chemical disorders, we find no indication of spin glass down to 260 mK from the Cm(T) and μSR data.
18 February 2019 Negative flat band magnetism in a spin–orbit-coupled correlated kagome magnet Electronic systems with flat bands are predicted to be a fertile ground for hosting emergent phenomena including unconven- tional magnetism and superconductivity, but materials that manifest this feature are rare. Here, we use scanning tunnelling microscopy to elucidate the atomically resolved electronic states and their magnetic response in the kagome magnet Co3Sn2S2.
18 January 2019 Search for the Magnetic Monopole at a Magnetoelectric Surface We show, by solving Maxwell’s equations, that an electric charge on the surface of a slab of a linear magnetoelectric material generates an image magnetic monopole below the surface provided that the magnetoelectric has a diagonal component in its magnetoelectric response. The image monopole, in turn, generates an ideal monopolar magnetic field outside of the slab.
21 December 2018 Magnetism in semiconducting molybdenum dichalcogenides Transition metal dichalcogenides (TMDs) are interesting for understanding the fundamental physics of two-dimensional (2D) materials as well as for applications to many emerging technologies, including spin electronics.
