Two-level quantum dot in the Aharonov-Bohm ring. Towards understanding "phase lapse"

• Autorzy: Stefański P.
• Konferencja: New Materials for Magnetoelectronics MAG-EL-MAT 2007, Będlewo near Poznań, 7-10 May 2007
• Języki publikacji: EN

Abstrakty

EN

It is shown theoretically that indirect interaction between two quantum dot levels can generate an anomalous phase shift for a system of the dot placed in one of the arms of the Aharonov-Bohm ring. The interaction between levels arises from the non-conservation of the orbital quantum number during the hopping process of electrons between the levels and leads. Such an unusual "phase lapse" behavior is observed experimentally and still lacks of proper theoretical description.

Słowa kluczowe

EN

quantum dot; Aharonov-Bohm ring; phase shift; phase lapse

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2007
• Tom: Vol. 25, No. 4
• Strony: 1243--1249
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Stefański P.

• Institute of Molecular Physics of the Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

Bibliografia

• [1] SCHUSTER R., BUKS E., HEILBLUM M., MAHALU D., UMANSKY V., STRINKMAN H., Nature, 385 (2000), 779.
• [2] AVINUN-KALISH M., HEILBLUM M., ZARCHIN O., MAHALU D., UMANSKY V., Nature, 436 (2005), 529.
• [3] SILVESTROV P.G., IMRY Y., Phys. Rev. Lett., 85 (2000), 2565.
• [4] SILVA A., OREG Y., GEFEN Y., Phys. Rev. B, 66 (2002), 195316
• [5] LANGRETH D.C., [in:] Linear and Nonlinear Transport in Solids, Plenum Press, New York, 1976.
• [6] HOFSTETTER W., KÖNIG J., SCHOELLER H., Phys. Rev. Lett., 87 (2001), 156803.
• [7] HEWSON A.C., The Kondo Problem to Heavy Fermions, Cambridge University Press, 1993.
• [8] FANO U., Phys. Rev., 124 (1961), 1866.
• [9] STEFAŃSKI P., TAGLIACOZZO A., BUŁKA B.R., Phys. Rev. Lett., 93 (2004), 186805.