Interacting Arrays of Steps and Lines in Random Media
Jan Kienfeld and Terence Hwa
Abastract
The phase diagram of two interacting planar arrays of directed
lines in random media is obtained by a renormalization group analysis.
The results are discussed in the contexts of the roughening of
reconstructed crystal surfaces, and the pinning of flux line arrays
in layered superconductors. Among the findings are a glassy flat
phase with disordered domain structures, a novel second-order
phase transition with continuously varying critical exponents,
and the generic disappearance of the glassy ``super-rough'' phases
found previously for a single array.
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