The size and surface effects in the specific heat of the monatomic linear chain are investigated for a small to intermediate number of atoms and for temperatures from OK u p t o B0, the zero-Debye temperature. It is shown that the surface-excess heat capacity, 6C, can reliably be extracted for chains of as few as ten atoms, although size effects are still quite appreciable for 50 to 100 atoms. The low-temperature limiting value of + k~ for 6C is reached for T & 0.076,. The freezing out of the lowest non-zero frequency in 6C becomes appreciable only for T & 0.058,, in the ten-atom chain and, more generally, for T & 9 , / N in the N-atom chain.GroBen-und Oberflacheneffekte der spezifischen Wbrme der monoatomaren. linearen Kette werden fur kleine his mittlere Atomnummern und fur Temperaturen von 0 K bis Oo (Null-Debye-Temperatur) untersucht. E s wird gezeigt, daJ3 die zusatzliche Oberflachenwarmekapazitlt 6C selbst fur Ketten mit nur etwa 10 Atomen zuverlassig bestimmt werden kann, obwohl der GroBeneffekt fur 50 his 100 Atome noch betrachtlich ist. Der Tieftemperatur-Grenzwert von a k B fur SC wird fur T 5 0.076, erreicht. Das Einfrieren der niedrigsten von null verschiedenen Frequenz von 6C ist in der
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