Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of SydneyAU578 papers
- Australian National UniversityAU542 papers
- Commonwealth Scientific and Industrial Research OrganisationAU329 papers
- Centre National de la Recherche ScientifiqueFR319 papers
- Macquarie UniversityAU309 papers
- Data61AU268 papers
- University of CambridgeGB253 papers
- Australian Astronomical ObservatoryAU246 papers
- Centre for Quantum Computation and Communication TechnologyAU243 papers
- Australian Defence Force AcademyAU233 papers
- ARC Centre of Excellence for All-sky AstrophysicsAU232 papers
- Swinburne University of TechnologyAU209 papers
21 papers · 2 filters
Further Series Studies of the Spin-1/2 Heisenberg Antiferromagnet at T=0: Magnon Dispersion and Structure Factors
Weihong Zheng, J. Oitmaa, C. J. Hamer
We have extended our previous series studies of quantum antiferromagnets at zero temperature by computing the one-magnon dispersion curves and various structure factors for the lin…
Relaxation energies and excited state structures of poly(para-phenylene)
Eric E. Moore, William Barford, Robert J. Bursill
We investigate the relaxation energies and excited state geometries of the light emitting polymer, poly(para-phenylene). We solve the Pariser-Parr-Pople-Peierls model using the den…
Temperature Dependence of the Magnetic Susceptibility for Triangular-Lattice Antiferromagnets with spatially anisotropic exchange constants
Weihong Zheng, Rajiv R. P. Singh, Ross H. McKenzie +1
We present the temperature dependence of the uniform susceptibility of spin-half quantum antiferromagnets on spatially anisotropic triangular-lattices, using high temperature serie…
Microscopic modelling of doped manganites
Alexander Weisse, Holger Fehske
Colossal magneto-resistance manganites are characterised by a complex interplay of charge, spin, orbital and lattice degrees of freedom. Formulating microscopic models for these co…
The field-induced magnetic ordering transition in TlCuCl
J. Sirker, A. Weiße, O. P. Sushkov
In the first part we investigate in detail if the Bose-Einstein condensation scenario for magnons can quantitatively explain the observed field-induced magnetic ordering in TlCuCl$…
Theory of incommensurate magnetic correlations across the insulator-superconductor transition in underdoped La_{2-x}Sr_xCuO_4
Oleg P. Sushkov, Valeri N. Kotov
The main feature in the elastic neutron scattering of La_{2-x}Sr_xCuO_4 is the existence of incommensurate peaks with positions that jump from 45 to 0 degrees at 5% doping. We show…
Long-range dynamics of magnetic impurities coupled to a two-dimensional Heisenberg antiferromagnet
Andreas Luscher, Oleg P. Sushkov
We consider a two-dimensional Heisenberg antiferromagnet on a square lattice with weakly coupled impurities, i.e. additional spins interacting with the host magnet by a small dimen…
Thermodynamics of a Spin-1/2 Chain Coupled to Einstein Phonons
Alexander Bühler, Götz S. Uhrig, Jaan Oitmaa
A high order series expansion is employed to study the thermodynamical properties of a S=1/2 chain coupled to dispersionless phonons. The results are obtained without truncating th…
Stability of the spiral phase in the 2D extended t-J model
Valeri N. Kotov, Oleg P. Sushkov
We analyze the t-t'-t''-J model at low doping by chiral perturbation theory and show that the (1,0) spiral state is stabilized by the presence of t',t'' above critical values aroun…
Unusual localisation effects in quantum percolation
Gerald Schubert, Alexander Weisse, Holger Fehske
We present a detailed study of the quantum site percolation problem on simple cubic lattices, thereby focussing on the statistics of the local density of states and the spatial str…
Ground state and finite temperature signatures of quantum phase transitions in the half-filled Hubbard model on a honeycomb lattice
Thereza Paiva, R. T. Scalettar, W. Zheng +2
We investigate ground state and finite temperature properties of the half-filled Hubbard model on a honeycomb lattice using quantum monte carlo and series expansion techniques. Unl…
Bose-Einstein condensation of magnons in TlCuCl
J. Sirker, A. Weisse, O. P. Sushkov
A quantitative study of the field-induced magnetic ordering in TlCuCl in terms of a Bose-Einstein condensation (BEC) of magnons is presented. It is shown that the hitherto prop…
Delocalisation transition in chains with correlated disorder
Gerald Schubert, Alexander Weisse, Holger Fehske
We show that in the one-dimensional (1D) Anderson model long-range correlations within the sequence of on-site potentials may lead to a region of extended states in the vicinity of…
Characterisation of Anderson localisation using distributions
A. Alvermann, G. Schubert, A. Weisse +2
We examine the use of distributions in numerical treatments of Anderson localisation and supply evidence that treating exponential localisation on Bethe lattices recovers the overa…
Spin-lattice coupling effects in the Holstein double-exchange model
Alexander Weisse, Holger Fehske, Dieter Ihle
Based on the Holstein double-exchange model and a highly efficient single cluster Monte Carlo approach we study the interplay of double-exchange and polaron effects in doped coloss…
Luttinger liquid versus charge density wave behaviour in the one-dimensional spinless fermion Holstein model
H. Fehske, G. Wellein, G. Hager +3
We discuss the nature of the different ground states of the half-filled Holstein model of spinless fermions in 1D. In the metallic regime we determine the renormalised effective co…
Soliton binding and low-lying singlets in frustrated odd-legged S=1/2 spin tubes
Andreas Luscher, Reinhard M. Noack, Gregoire Misguich +2
Motivated by the intriguing properties of the vanadium spin tube Na2V3O7, we show that an effective spin-chirality model similar to that of standard Heisenberg odd-legged S=1/2 spi…
Order and disorder in the triangular-lattice t-J-V model at 2/3 electron density
W. Zheng, J. Oitmaa, C. J. Hamer +1
Motivated by the recent discovery of superconductivity in NaCoOHO, we use series expansion methods and cluster mean-field theory to study spontaneous charge orde…
Interaction Correction to the Longitudinal Conductivity and Hall Resistivity in High Quality Two-Dimensional GaAs Electron and Hole Systems
C. E. Yasin, T. L. Sobey, A. P. Micolich +7
We present a systematic study of the corrections to both the longitudinal conductivity and Hall resistivity due to electron-electron interactions in high quality GaAs systems using…
Consequences of spin-orbit coupling for the Bose-Einstein condensation of magnons
J. Sirker, A. Weiße, O. P. Sushkov
In the first part we discuss how the BEC picture for magnons is modified by anisotropies induced by spin-orbit coupling. In particular we focus on the effects of antisymmetric spin…
Dynamical model of the dielectric screening of conjugated polymers
William Barford, Robert Bursill, David Yaron
A dynamical model of the dielectric screening of conjugated polymers is introduced and solved using the density matrix renormalization group method. The model consists of a line of…