Author： Carignano M. A. Gladich I.
Publisher： Edp Sciences
E-ISSN： 1286-4854|90|6|63001-63001
ISSN： 0295-5075
Source： EPL (EUROPHYSICS LETTERS), Vol.90, Iss.6, 2010-07, pp. : 63001-63001
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Abstract
We propose a new mechanism to explain the origin of negative heat capacity in small systems. We show how a particular structure of the potential energy surface combined with a microcanonical treatment results in negative heat capacity. Moreover, this effect occurs under true equilibrium conditions. An energy landscape with a sudden and spatially large opening leads to a negative heat capacity. The magnitude of this effect is related to the extent of the opening and the number of particles in the system.
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