1999/08/31 by Stefan Kettemann, Peter Fulde, Peter Strehlow · 6 citations
Materials Science · Physics and Astronomy · #Phase-change materials and chalcogenides #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.dis-nn #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.83.4325
published as Phys. Rev. Lett. 83, 4325(1999) · 4 pages
openalex publication_date 1999/11/22 · arxiv created 2000/03/25 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
Low temperature properties of glasses are derived within a generalized tunneling model, considering the motion of charged particles on a closed path in a double-well potential. The presence of a magnetic induction field B violates the time reversal invariance due to the Aharonov-Bohm phase, and leads to flux periodic energy levels. At low temperature, this effect is shown to be strongly enhanced by dipole-dipole and elastic interactions between tunneling systems and becomes measurable. Thus, the recently observed strong sensitivity of the electric permittivity to weak magnetic fields can be explained. In addition, superimposed oscillations as a function of the magnetic field are predicted.