4.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University College LondonGB816 papers
- Thomas Young CentreGB105 papers
- University of CambridgeGB94 papers
- University of OxfordGB89 papers
- Rutherford Appleton LaboratoryGB87 papers
- Paul Scherrer InstituteCH81 papers
- Centre National de la Recherche ScientifiqueFR78 papers
- Imperial College LondonGB59 papers
- École Polytechnique Fédérale de LausanneCH57 papers
- Brookhaven National LaboratoryUS52 papers
- University of GenevaCH52 papers
- ETH ZurichCH48 papers
38 papers · 1 filter
Covalent bonding and magnetism in cuprates
A. C. Walters, T. G. Perring, J. -S. Caux +5
The importance of covalent bonding for the magnetism of 3d metal complexes was first noted by Pauling in 1931. His point became moot, however, with the success of the ionic picture…
Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
B. Thielemann, Ch. Rüegg, H. M. Rønnow +12
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon m…
Nanomechanical detection of antibiotic-mucopeptide binding in a model for superbug drug resistance
J. W. Ndieyira, M. Watari, A. Donoso Barrera +10
The alarming growth of the antibiotic-resistant superbugs methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus (VRE) is driving the development…
Silicon as a model ion trap: time domain measurements of donor Rydberg states
N Q Vinh, P T Greenland, K Litvinenko +9
One of the great successes of quantum physics is the description of the long-lived Rydberg states of atoms and ions. The Bohr model is equally applicable to donor impurity atoms in…
Dipole-active optical phonons in YTiO_3: ellipsometry study and lattice-dynamics calculations
N. N. Kovaleva, A. V. Boris, L. Capogna +6
The anisotropic complex dielectric response was accurately extracted from spectroscopic ellipsometry measurements at phonon frequencies for the three principal crystallographic dir…
Toward Perfection: Kapellasite, Cu3Zn(OH)6Cl2, a New Model S = 1/2 Kagome Antiferromagnet
R. H. Colman, C. Ritter, A. S. Wills
The search for the resonating valence bond (RVB) state continues to underpin many areas of condensed matter research. The RVB is made from the dimerisation of spins on different si…
Hydrogen dissociation on the Mg(0001) surface from quantum Monte Carlo calculations
M. Pozzo, D. Alfe`
We have used diffusion Monte Carlo (DMC) simulations to calculate the energy barrier for H dissociation on the Mg(0001) surface. The calculations employ pseudopotentials and sy…
Macroscopic signature of protected spins in a dense frustrated magnet
S. Ghosh, T. F. Rosenbaum, G. Aeppli
The inability of systems of interacting objects to satisfy all constraints simultaneously leads to frustration. A particularly important consequence of frustration is the ability t…
Doping a semiconductor to create an unconventional metal
N. Manyala, J. F. DiTusa, G. Aeppli +1
Landau Fermi liquid theory, with its pivotal assertion that electrons in metals can be simply understood as independent particles with effective masses replacing the free electron…
The role of magnetic anisotropy in the Kondo effect
Alexander F. Otte, Markus Ternes, Kirsten von Bergmann +5
In the Kondo effect, a localized magnetic moment is screened by forming a correlated electron system with the surrounding conduction electrons of a non-magnetic host. Spin S=1/2 Ko…
Ordering of localized electronic states in multiferroic TbMnO3: a soft X-ray resonant scattering study
T. R. Forrest, S. R. Bland, S. B. Wilkins +8
Soft X-ray resonant scattering (XRS) has been used to observe directly, for the first time, the ordering of localized electronic states on both the Mn and Tb sites in multiferroic…
Field-Controlled Magnetic Order in the Quantum Spin-Ladder System (Hpip)2CuBr4
B. Thielemann, Ch. Rüegg, K. Kiefer +18
Neutron diffraction is used to investigate the field-induced, antiferromagnetically ordered state in the two-leg spin-ladder material (Hpip)2CuBr4. This "classical" phase, a conseq…
On the accuracy of DFT exchange-correlation functionals for H bonds in small water clusters II: The water hexamer and van der Waals interactions
Biswajit Santra, Angelos Michaelides, Martin Fuchs +3
Second order Moeller-Plesset perturbation theory (MP2) at the complete basis set (CBS) limit and diffusion quantum Monte Carlo (DMC) are used to examine several low energy isomers…
Thermodynamics of the Spin Luttinger-Liquid in a Model Ladder Material
Ch. Rüegg, K. Kiefer, B. Thielemann +11
The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-ladder compound (C5H12N)2CuBr4 is studied by measurements of the specific heat and the magne…
Thermal fluctuations in moderately damped Josephson junctions: Multiple escape and retrapping, switching- and return-current distributions and hysteresis
J. C. Fenton, P. A. Warburton
A crossover at a temperature T* in the temperature dependence of the width s of the distribution of switching currents of moderately damped Josephson junctions has been reported in…
Mechanism of phase transitions and the electronic density of states in (La,Sm)FeAsOF from ab initio calculations
P. V. Sushko, A. L. Shluger, M. Hirano +1
The structure and electronic density of states in layered LnFeAsOF (Ln=La,Sm; =0.0, 0.125, 0.25) are investigated using density functional theory. For the =0.0 sy…
Comment on 'Molybdenum at High Pressure and Temperature: Melting from Another Solid Phase'
C. Cazorla, D. Alfè, M. J. Gillan
There has been a major controversy over the past seven years about the high-pressure melting curves of transition metals. Static compression (diamond-anvil cell: DAC) experiments u…
Two-dimensional molecular para-hydrogen and ortho-deuterium at zero temperature
C. Cazorla, J. Boronat
We study molecular para-hydrogen (p-) and ortho-deuterium (o-) in two dimensions and in the limit of zero temperature by means of the diffusion Monte Carl…
Long-lived spin entanglement induced by a spatially correlated thermal bath
Dara P. S. McCutcheon, Ahsan Nazir, Sougato Bose +1
We investigate how two spatially separated qubits coupled to a common heat bath can be entangled by purely dissipative dynamics. We identify a dynamical time scale associated with…
Fast nuclear spin hyperpolarization of phosphorus in silicon
D. R. McCamey, J. van Tol, G. W. Morley +1
We experimentally demonstrate a method for obtaining nuclear spin hyperpolarization, that is, polarization significantly in excess of that expected for a thermal equilibrium. By ex…
Long spin coherence in silicon with an electrical spin trap readout
G. W. Morley, D. R. McCamey, H. A. Seipel +3
Pulsed electrically-detected magnetic resonance of phosphorous (31P) in bulk crystalline silicon at very high magnetic fields (B > 8.5 T) and low temperatures (T = 2.8 K) is presen…
Dynamic nuclear polarization with simultaneous excitation of electronic and nuclear transitions
G. W. Morley, K. Porfyrakis, A. Ardavan +1
Dynamic nuclear polarization transfers spin polarization from electrons to nuclei. We have achieved this by a new method, simultaneously exciting transitions of electronic and nucl…
Molecular Thin Films: a New Type of Magnetic Switch
S. M. Heutz, C. Mitra, W. Wu +9
The design and fabrication of materials that exhibit both semiconducting and magnetic properties for spintronics and quantum computing has proven difficult. Important starting poin…
Bose-Einstein Quantum Statistics and the Ground State of Solid 4He
C. Cazorla, G. E. Astrakharchik, J. Casulleras +1
The ground state of solid He is studied using the diffusion Monte Carlo method and a new trial wave function able to describe the supersolid. The new wave function is symmetric…