Search


	Podcast:		Geowissenschaften - Open Access LMU
	Episode:		Reliability of low-energy electron diffraction for studies of surface order-disorder phenomena
	Category:		Science & Medicine
	Duration:		00:00:00
	Publish Date:		1986-01-01 05:00:00
	Description:		It is shown that a determination of critical exponents in surface phase transformations based on a kinematic analysis of LEED peak intensities is subject to errors caused by multiple scattering that are large enough to prevent a clear assignment to a known universality class. The multiple-scattering contribution arises from short-range flucutations and has its maximum value at the transition temperature. The specific-heat exponent of the surface phase can be measured directly from the variation of the integral-order-beam intensity with temperature that is caused by the multiple scattering.
	Total Play:		0