Measurements of flux-dependent screening in aharonov-bohm rings
Phys Rev Lett
; 84(23): 5379-82, 2000 Jun 05.
Article
em En
| MEDLINE
| ID: mdl-10990948
ABSTRACT
In order to investigate the effect of electronic phase coherence on screening we have measured the flux-dependent polarizability of isolated mesoscopic rings at 350 MHz. At low temperatures (below 100 mK) both the nondissipative and the dissipative parts of the polarizability exhibit flux oscillations with a period of one-half a flux quantum in a ring. The sign and amplitude of the effect are in good agreement with recent theoretical predictions. The observed positive magnetopolarizability corresponds to an enhancement of screening when time reversal symmetry is broken. The effect of electronic density and temperature are also measured.
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Base de dados:
MEDLINE
Tipo de estudo:
Diagnostic_studies
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Screening_studies
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
França