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Density of states on fractals : « fractons »

- S. Alexander, R. Orbach
- Physics
- 1 September 1982

The density of states on a fractal is calculated taking into account the scaling properties of both the volume and the connectivity. We use a Green's function method developed elsewhere which… Expand

Linear antiferromagnetic chain with anisotropic coupling

- R. Orbach
- Physics
- 15 October 1958

The exact solution is given for a linear chain of $N$ atoms of spin \textonehalf{} coupled together by the anisotropic Hamiltonian… Expand

Excitation Dynamics in Random One-Dimensional Systems

- S. Alexander, J. Bernasconi, W. Schneider, R. Orbach
- Physics
- 1981

In a number of recent publications, [1] – [5], we have discussed the asymptotic form of the dynamics of a general type of random one-dimensional chains. The equations we discuss are of the form
… Expand

Dynamical properties of fractal networks: Scaling, numerical simulations, and physical realizations

- T. Nakayama, K. Yakubo, R. Orbach
- Physics
- 1 April 1994

This article describes the advances that have been made over the past ten years on the problem of fracton excitations in fractal structures. The relevant systems to this subject are so numerous that… Expand

Dynamics of Fractal Networks

- R. Orbach
- Physics, Medicine
- Science
- 21 February 1986

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Spin-lattice relaxation in rare-earth salts

- R. Orbach
- Chemistry
- Proceedings of the Royal Society of London…
- 5 December 1961

A general approach to spin-lattice relaxation is given for salts to which a crystalline field theory is appropriate. In particular, the theory of Elliott & Stevens for the interaction of a rare-earth… Expand

EXTRACTION OF THE SPIN GLASS CORRELATION LENGTH

- Y. Joh, R. Orbach, G. G. Wood, J. Hammann, E. Vincent
- Physics
- 18 September 1998

A change in magnetic field H quenches the barriers in a spin glass for heights less than an associated change in Zeeman energy, E_z. The shift of the peak of S(t)=-dM_{TRM}(t,t_w)/H/{d lnt} with H… Expand

Energy Production: A Global Perspective

- R. Orbach
- Engineering
- 2012

Abstract Canada has the world's third largest oil reserves, with 97% of these (170 Bb, billion barrels) in the oil sands. Of these, 20% are recoverable with mining, while most (80%) are recoverable… Expand

Spin-Lattice Relaxation in Cerium Magnesium Nitrate at Liquid Helium Temperature: A New Process

The spin-lattice relaxation time of Ce3+ in cerium magnesium nitrate has been measured as a function of temperature and of magnetic fields up to 1000 gauss. In the temperature range between 3° and… Expand

Full aging in spin glasses.

- G. F. Rodriguez, G. G. Kenning, R. Orbach
- Physics, Medicine
- Physical review letters
- 11 December 2002

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