Hole--polaron formation in the 2D Holstein--t--J model: A variational Lanczos study (2007)
Fehske Roder Wellein, H. Fehske, H. Roder, G. Wellein, A. Mistriotis
Polaronic features of dopant--induced charge carriers are manifest in recent experiments on La 2\Gammax Sr x CuO 4+y and La 2\Gammax Ni x CuO 4+y . To study the formation of hole (bi)polarons in such...
Dimitrov, D. A., Roder, H., Bishop, A. R.
The effect of the powder average on the peak shapes and positions in neutron pair distribution functions of polycrystalline materials is examined. It is shown that for highly anisotropic crystals,...
A family of single-user autostereoscopic displays with head-tracking capabilities (2000)
Borner, R., Duckstein, B., Machui, O., Roder, H., Sinnig, T., Sikora, T.
We present prototypes of autostereoscopic displays which allow single users to experience stereoscopic vision without the need for special eye glasses or helmet-mounted displays. The design of the...
Observation of two time scales in the ferromagnetic manganite La(1-x)Ca(x)MnO(3), x = 0.3 (1999)
Heffner, R. H., Sonier, J. E., MacLaughlin, D. E., Nieuwenhuys, G. J., Ehlers, G., Mezei, F., ...
We report new zero-field muon spin relaxation and neutron spin echo measurements in ferromagnetic (FM) (La,Ca)MnO3 which taken together suggest two spatially separated regions in close proximity...
Gammel, J. T., Yonemitsu, K., Saxena, A., Bishop, A. R., Roder, H.
We discuss the consequence of both electron-phonon and electron-electron couplings in 1D and 2D multiband (Peierls- Hubbard) model. After briefly discussing various analytic limits, we focus on...
Determinants of protein hydrogen exchange studied in equine cytochrome c (1998)
MILNE, J. S., MAYNE, L., RODER, H., WAND, A. J., ENGLANDER, S. W.
We present an efficient algorithm for calculating spectral properties of large sparse Hamiltonian matrices such as densities of states and spectral functions. The combination of Chebyshev recursion...
High Temperature Thermodynamics of the Ferromagnetic Kondo-Lattice Model (1997)
Roder, H., Singh, R. R. P., Zang, J.
We present a high temperature series expansion for the ferromagnetic Kondo lattice model in the large coupling limit, which is used to model CMR perovskites. Our results show the expected cross-over...
Strain mediated two-dimensional growth kinetics in metal heteroepitaxy: Ag/Pt(1111) (1997)
Roder, H., Bromann, K., Brune, H., Kern, K.
We have investigated the influence of strain on the morphology in metal heteroepitaxy at temperatures where growth is dominated by kinetics. Whereas Ag(111) homoepitaxy is three dimensional below 400...
Schuster, R., Roder, H., Bromann, K., Brune, H., Kern, K.
Upon annealing above 620 K, submonolayers of Ag deposited on Pt(111) are known to mix into the first surface layer. Thereby the individual Ag atoms reduce the strain fields caused by the lattice...
Anisotropic corner diffusion as origin for dendritic growth on hexagonal substrates (1996)
Brune, H., Roder, H., Bromann, K., Kern, K., Jacobsen, J., Stoltze, P., ...
Ag aggregation on Ag(111), Pt(111), and 1 ML Ag pseudomorphically grown on Pt(111), has been studied with variable temperature STM. These systems all have in common that dendritic patterns with...
Double Degeneracy and Jahn-Teller Effects in CMR Perovskites (1995)
Zang, Jun, Bishop, A. R., Roder, H.
Jahn-Teller (JT) electron-phonon coupling effects in the colossal magnetoresistance perovskite compounds $La_{1-x}A_xMnO_3$ are investigated. Electron-electron correlations between two degenerate Mn...
Full-colour diffraction-based optical system for light-valve projection displays (1995)
Roder, H., Gerhard-Multhaupt, R., Ipp, E., Menzel, I.
In the final article of this three-part series, the optical system for a light-valve projector with metallized viscoelastic control layers and active-matrix addressing is described. The requirements...
Stability of Disk and Stripe Patterns of Nanostructures at Surfaces (1995)
Zeppenfeld, P., Krzyzowski, M. A., Romainczyk, C., David, R., Comsa, G., Roder, H., ...
The ordering of two-dimensional Ag islands embedded in the Pt(111) surface layer has been investigated using He-atom scattering and scanning tunneling microscopy. At lower Ag coverage the embedded...
Aggregation of Fractal and Dendritic Ag Clusters on a Pt(111) Surface (1995)
Brune, H., Roder, H., Romainczyk, C., Boragno, C., Kern, K.
We have used variable-temperature scanning tunneling microscopy to study the aggregation of two-dimensional Ag clusters on Pt(111). A transition from randomly ramified to dendritic fractal growth is...
Kinetic Processes in Metal Epitaxy Studied with Variable-Temperature Stm - Ag/Pt(111) (1995)
Brune, H., Roder, H., Bromann, K., Kern, K.
Variable-temperature scanning tunneling microscopy has been applied to study kinetic processes involved in epitaxial growth. This paper concentrates on nucleation and aggregation of submonolayer Ag...
Effect of Strain on Surface-Diffusion and Nucleation (1995)
Brune, H., Bromann, K., Roder, H., Kern, K., Jacobsen, J., Stoltze, P., ...
The influence of strain on diffusion and nucleation has been studied by means of scanning tunneling microscopy and effective-medium theory for Ag self-diffusion on strained and unstrained (111)...
Interlayer Mass-Transport in Homoepitaxial and Heteroepitaxial Metal Growth (1995)
Bromann, K., Brune, H., Roder, H., Kern, K.
We describe a general method for the quantitative determination of the interlayer mass transport in epitaxial growth. Through measurement of the nucleation rate on top of islands as a function of...
Mechanism of the Transition from Fractal to Dendritic Growth of Surface Aggregates (1994)
Brune, H., Romainczyk, C., Roder, H., Kern, K.
THE similarity of many patterns formed in non-equilibrium growth processes in physics, chemistry and biology is conspicuous, and many attempts have been made to discover common mechanisms underlying...
Strain Relief at Hexagonal-Close-Packed Interfaces (1994)
Brune, H., Roder, H., Boragno, C., Kern, K.
The mechanism of strain relief for compressively stressed Ag layers epitaxially grown on Pt(111) is studied by scanning tunneling microscopy. The strain in the compressed commensurate (1X1) Ag...
Microscopic View of Nucleation on Surfaces (1994)
Brune, H., Roder, H., Boragno, C., Kern, K.
Nucleation has been studied on atomic scale for Ag deposition on a Pt(111) surface at low temperature (50-120 K) by means of variable-temperature scanning tunneling microscopy. From island density...
Monolayer-Confined Mixing at the Ag-Pt(111) Interface (1993)
Roder, H., Schuster, R., Brune, H., Kern, K.
The present tunneling microscopy study reveals that the growth of silver on Pt(111) at substrate temperatures above 620 K results in the formation of a two-dimensional alloy consisting of Ag clusters...
Roder, H., Hahn, E., Brune, H., Bucher, J. P., Kern, K.
THE formation of nanometre-scale surface structures by atomic manipulation with the scanning tunneling microscope has opened up opportunities for creating new metastable states of matter atom by...
Changing Morphology of Metallic Monolayers Via Temperature-Controlled Heteroepitaxial Growth (1993)
Roder, H., Brune, H., Bucher, J. P., Kern, K.
Variable temperature scanning tunneling microscopy at substrate temperatures between 25 and 550 K reveals a transition from diffusion limited aggregation to thermodynamic equilibrium in the...
Squalamine: an aminosterol antibiotic from the shark.
Moore, K S, Wehrli, S, Roder, H, Rogers, M, Forrest, J N, McCrimmon, D, ...
In recent years, a variety of low molecular weight antibiotics have been isolated from diverse animal species. These agents, which include peptides, lipids, and alkaloids, exhibit antibiotic activity...
Fast events in protein folding initiated by nanosecond laser photolysis.
Jones, C M, Henry, E R, Hu, Y, Chan, C K, Luck, S D, Bhuyan, A, ...
Initiation of protein folding by light can dramatically improve the time resolution of kinetic studies. Here we present an example of an optically triggered folding reaction by using nanosecond...
Early hydrogen-bonding events in the folding reaction of ubiquitin.
The formation of hydrogen-bonded structure in the folding reaction of ubiquitin, a small cytoplasmic protein with an extended beta-sheet and an alpha-helix surrounding a pronounced hydrophobic core,...
Comparison of the magnetic properties of deoxy- and photodissociated myoglobin.
Roder, H, Berendzen, J, Bowne, S F, Frauenfelder, H, Sauke, T B, Shyamsunder, E, ...
The magnetic susceptibility of photodissociated carbon monoxy myoglobin has been measured over the temperature range from 1.7 to 25 K at 10 and 50 kG with a superconducting susceptometer. The spin...
Dlott, D D, Frauenfelder, H, Langer, P, Roder, H, DiIorio, E E
Binding of carbon monoxide to beta chains of hemoglobin Zürich has been studied by flash photolysis over the time range of nanoseconds to seconds at temperatures from 20 to 300 K. From 20 to 200 K a...
Assignment of paramagnetically shifted resonances in the 1H NMR spectrum of horse ferricytochrome c.
Feng, Y Q, Roder, H, Englander, S W
The proton resonances of the heme, the axial ligands, and other hyperfine-shifted resonances in the 1H nuclear magnetic resonance spectrum of horse ferricytochrome c have been investigated by means...
Chemical exchange in two dimensions in the 1H NMR assignment of cytochrome c.
Feng, Y Q, Wand, A J, Roder, H, Englander, S W
The important role played by chemical exchange in solving the proton assignment problem for oxidized and reduced horse cytochrome c is described. Some novel approaches for establishing...
A continuous-flow capillary mixing method to monitor reactions on the microsecond time scale.
Shastry, M C, Luck, S D, Roder, H
A continuous-flow capillary mixing apparatus, based on the original design of Regenfuss et al. (Regenfuss, P., R. M. Clegg, M. J. Fulwyler, F. J. Barrantes, and T. M. Jovin. 1985. Rev. Sci. Instrum....
SQUID measurement of metalloprotein magnetization. New methods applied to the nitrogenase proteins.
Day, E P, Kent, T A, Lindahl, P A, Münck, E, Orme-Johnson, W H, Roder, H, ...
New techniques have been developed to exploit the sensitivity of a commercial SQUID susceptometer in the study of the magnetization of metalloproteins. Previous studies have ignored both the slow...
Chang, C H, Govindjee, R, Ebrey, T, Bagley, K A, Dollinger, G, Eisenstein, L, ...
We studied an analogue of bacteriorhodopsin whose chromophore is based on all-trans retinal. A five-membered ring was built around the 13-14 double bond so as to prohibit trans to 13-cis...
Squalamine: an aminosterol antibiotic from the shark.
Moore, K S, Wehrli, S, Roder, H, Rogers, M, Forrest, J N, McCrimmon, D, ...
In recent years, a variety of low molecular weight antibiotics have been isolated from diverse animal species. These agents, which include peptides, lipids, and alkaloids, exhibit antibiotic activity...
Fast events in protein folding initiated by nanosecond laser photolysis.
Jones, C M, Henry, E R, Hu, Y, Chan, C K, Luck, S D, Bhuyan, A, ...
Initiation of protein folding by light can dramatically improve the time resolution of kinetic studies. Here we present an example of an optically triggered folding reaction by using nanosecond...
Early hydrogen-bonding events in the folding reaction of ubiquitin.
The formation of hydrogen-bonded structure in the folding reaction of ubiquitin, a small cytoplasmic protein with an extended beta-sheet and an alpha-helix surrounding a pronounced hydrophobic core,...
Comparison of the magnetic properties of deoxy- and photodissociated myoglobin.
Roder, H, Berendzen, J, Bowne, S F, Frauenfelder, H, Sauke, T B, Shyamsunder, E, ...
The magnetic susceptibility of photodissociated carbon monoxy myoglobin has been measured over the temperature range from 1.7 to 25 K at 10 and 50 kG with a superconducting susceptometer. The spin...
Dlott, D D, Frauenfelder, H, Langer, P, Roder, H, DiIorio, E E
Binding of carbon monoxide to beta chains of hemoglobin Zürich has been studied by flash photolysis over the time range of nanoseconds to seconds at temperatures from 20 to 300 K. From 20 to 200 K a...
Assignment of paramagnetically shifted resonances in the 1H NMR spectrum of horse ferricytochrome c.
Feng, Y Q, Roder, H, Englander, S W
The proton resonances of the heme, the axial ligands, and other hyperfine-shifted resonances in the 1H nuclear magnetic resonance spectrum of horse ferricytochrome c have been investigated by means...
Chemical exchange in two dimensions in the 1H NMR assignment of cytochrome c.
Feng, Y Q, Wand, A J, Roder, H, Englander, S W
The important role played by chemical exchange in solving the proton assignment problem for oxidized and reduced horse cytochrome c is described. Some novel approaches for establishing...
A continuous-flow capillary mixing method to monitor reactions on the microsecond time scale.
Shastry, M C, Luck, S D, Roder, H
A continuous-flow capillary mixing apparatus, based on the original design of Regenfuss et al. (Regenfuss, P., R. M. Clegg, M. J. Fulwyler, F. J. Barrantes, and T. M. Jovin. 1985. Rev. Sci. Instrum....
SQUID measurement of metalloprotein magnetization. New methods applied to the nitrogenase proteins.
Day, E P, Kent, T A, Lindahl, P A, Münck, E, Orme-Johnson, W H, Roder, H, ...
New techniques have been developed to exploit the sensitivity of a commercial SQUID susceptometer in the study of the magnetization of metalloproteins. Previous studies have ignored both the slow...
Chang, C H, Govindjee, R, Ebrey, T, Bagley, K A, Dollinger, G, Eisenstein, L, ...
We studied an analogue of bacteriorhodopsin whose chromophore is based on all-trans retinal. A five-membered ring was built around the 13-14 double bond so as to prohibit trans to 13-cis...
A new approach to NMR solution structure refinement is introduced that uses paramagnetic effects on nuclear chemical shifts as constraints in energy minimization or molecular dynamics calculations....
Zhang, Y. Z., Paterson, Y., Roder, H.
In an effort to develop a more versatile quenched hydrogen exchange method for studies of peptide conformation and protein-ligand interactions, the mechanism of amide proton exchange for model...
Laub, P. B., Khorasanizadeh, S., Roder, H.
The local structure within an 8-A radius around residue 45 of a recombinant F45W variant of human ubiquitin has been determined using 67 interproton distance restraints measured by two-dimensional...
Determinants of protein hydrogen exchange studied in equine cytochrome c.
Milne, J. S., Mayne, L., Roder, H., Wand, A. J., Englander, S. W.
The exchange of a large number of amide hydrogens in oxidized equine cytochrome c was measured by NMR and compared with structural parameters. Hydrogens known to exchange through local structural...
Rankin, S. E., Watts, A., Roder, H., Pinheiro, T. J.
Unfolded apocytochrome c acquires an alpha-helical conformation upon interaction with lipid. Folding kinetic results below and above the lipid's CMC, together with energy transfer measurements of...