Münster 1997 – scientific programme
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TT: Tiefe Temperaturen
TT 6: Postersitzung I: Mesoskopie(1-21), amorphe Metalle und Defektsysteme(22-29), Kryotechnik, Kernmagnetismus(30-37), festes N2(38), Quantenflüssigkeiten und -kristalle(39-48), dünne supraleitende Filme(49-68), schwere Fermionen und Kondosysteme(69-92), Fullerene(93-94)
TT 6.17: Poster
Tuesday, March 18, 1997, 09:30–13:00, Z1
Orbital magnetism of classically chaotic quantum systems — •Bernhard Mehlig and Klaus Richter — Max-Planck-Institut f"ur Physik komplexer Systeme, Bayreuther Str. 40, Haus 16, 01187 Dresden
We consider a ring threaded by a magnetic flux and calculate the orbital magnetic susceptibility. Assuming chaotic classical dynamics, we derive a semi-classical approximation for the orbital susceptibility and compare the results with exact quantum-mechanical calculations. In particular, we discuss the temperature dependence. At low temperatures, action correlations determine the magnetic response.