Condensed Matter Theory

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When All Length Scales are Important

Physics Bulletin IOP Publishing 36:9 (1985) 383-386
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The instability of long-period commensurate phases in the presence of quenched impurities

Journal of Physics C: Solid State Physics 18:20 (1985) 3911-3918

Authors:

P Bak, S Coppersmith, Y Shapir, S Fishman, J Yeomans

Abstract:

Domain-wall arguments are used to study the stability of long-period commensurate phases in the presence of quenched impurities. It is found that in three dimensions phases with periodicity larger than a critical value lc - 1/c, where c is the impurity concentration, are unstable. This results in disordered 'spin-glass'-like phases. The effect can be studied experimentally by varying the impurity concentration in modulated systems. © 1985, IOP Publishing Ltd.
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Localization of sensory levels in traumatic quadriplegia by segmental somatosensory evoked potentials

Clinical Neurophysiology Elsevier 62:4 (1985) 313-316

Authors:

Anne A Louis, Pramila Gupta, Inder Perkash
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Local magnetic field distributions. II. Further results.

Phys Rev B Condens Matter 31:11 (1985) 7355-7367

Authors:

TC Choy, D Sherrington, M Thomsen, MF Thorpe
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Axial Ising model with third-neighbour interactions

Journal of Physics C Solid State Physics 18:14 (1985) L393-L399

Authors:

W Selke, M Barreto, J Yeomans

Abstract:

A three-dimensional Ising model with competing interactions up to third-neighbour layers is analysed using low-temperature series expansions and mean field theory. New sequences of phases springing from multiphase lines are found and the crossover to the behaviour of the ANNNI model is studied. Results are related to experimental findings on alloys, ferroelectrics, and polytypes. © 1985 The Institute of Physics.
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