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6 papers · 2 filters
Study of diffuse scattering under hydrostatic pressure in PbMg1/3Nb2/3O3
G -M Rotaru, B Padmanabhan, S N Gvasaliya +5
We report measurements of the evolution of the diffuse scattering in a single crystal PbMg1/3Nb2/3O3 as a function of hydrostatic pressure. Upon applying pressure the diffuse scatt…
Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
P. Giannozzi, S. Baroni, N. Bonini +30
Quantum ESPRESSO is an integrated suite of computer codes for electronic-structure calculations and materials modeling, based on density-functional theory, plane waves, and pseudop…
Electron-Hole Crossover in Graphene Quantum Dots
J. Guettinger, C. Stampfer, F. Libisch +4
We investigate the addition spectrum of a graphene quantum dot in the vicinity of the electron-hole crossover as a function of perpendicular magnetic field. Coulomb blockade resona…
Anomalous spin-waves and the commensurate-incommensurate magnetic phase transition in LiNiPO4
T. B. S. Jensen, N. B. Christensen, M. Kenzelmann +9
Detailed spin-wave spectra of magneto-electric LiNiPO4 have been measured by neutron scattering at low temperatures in the commensurate (C) antiferromagnetic (AF) phase with orderi…
Field-induced magnetic phases and electric polarization in LiNiPO4
T. B. S. Jensen, N. B. Christensen, M. Kenzelmann +9
Neutron diffraction is used to probe the (H,T) phase diagram of magneto-electric (ME) LiNiPO4 for magnetic fields along the c-axis. At zero field the Ni spins order in two antiferr…
Spin-glass state and long-range magnetic order in Pb(Fe1/2Nb1/2)O3
G. -M. Rotaru, B. Roessli, A. Amato +4
We have investigated the magnetic ground-state of the multiferroic relaxor ferroelectric \pfn with SR spectroscopy and neutron scattering. We find that a transition to a partial…