Finite-size effects on the W(001) low-temperature phase transition

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Abstract
The W(001) low-temperature, reconstructive phase transition was studied by low-energy electron diffraction with use of a carefully aligned, low-step-density W(001) surface. Finite-size effects on this transition were studied by observing the same transition on a high-step-density W(001) surface which has limited size reconstruction domains of \ensuremath{\sim}60\times\else\texttimes\fi{}30 A\r{}. The critical behavior of the step-limited domains shows rounding of the order parameter and shifting of the critical temperature as compared with the results obtianed from the much larger flat-surface domains.