22 research outputs found
Can disorder induce a finite thermal conductivity in 1D lattices?
We study heat conduction in one dimensional mass disordered harmonic and
anharmonic lattices. It is found that the thermal conductivity of the
disordered anharmonic lattice is finite at low temperature, whereas it diverges
as at high temperature. Moreover, we demonstrate that a
unique nonequilibrium stationary state in the disordered harmonic lattice does
not exist at all.Comment: 4 pages with 4 eps figure
Comparison of the Electronic Structures and Energetics of Ferroelectric LiNbO3 and LiTaO3
This paper explains the origin of the ferroelectric instability in LiNbO3 and
LiTaO3 and compares the electronic structures and energetics of the two
materials.Comment: 31 pages, 11 Postscript figure