3 papers
cond-mat1995
Disorder-Driven Pretransitional Tweed in Martensitic Transformations
Sivan Kartha, James Krumhansl, James Sethna +1
Defying the conventional wisdom regarding first--order transitions, {\it solid--solid displacive transformations} are often accompanied by pronounced pretransitional phenomena. Gen…
cond-mat1992
Hysteresis and hierarchies: dynamics of disorder-driven first-order phase transformations
James P. Sethna, Karin Dahmen, Sivan Kartha +3
We use the zero-temperature random-field Ising model to study hysteretic behavior at first-order phase transitions. Sweeping the external field through zero, the model exhibits hys…
cond-mat1992
Tweed in Martensites: A Potential New Spin Glass
James P. Sethna, Sivan Kartha, Teresa Cast'an +1
We've been studying the ``tweed'' precursors above the martensitic transition in shape--memory alloys. These characteristic cross--hatched modulations occur for hundreds of degrees…