Hall resistance anomalies in the integer and fractional quantum Hall regime
Küçük Resim Yok
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
CC0 1.0 Universal
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
Özet
Experimental evidence of resistance anomalies in the high-mobility two-dimensional electron gas (2DEG) formed in the GaAs/AlGaAs heterostructure, in the integer and fractional quantized Hall regime, is shown. The data complement to a good approximation the semianalytic calculations used to describe the formation of integral and fractional incompressible strips. The widths of current-carrying channels were calculated by incorporating the screening properties of the 2DEG and the effect of a magnetic field in the perpendicular mode. The manybody effects of the composite fermions are taken into consideration for the energy gap for the fractional states. It is shown that incompressible strips at the edges for both integer and fractional filling factors coexist in their evanescent phase for a particular range of magnetic fields, resulting in overshoot effects at the Hall resistance. Specifically, anomalous Hall resistances were noticed for filling factors v = 4/3, 3/2, 5/3, 8/3, 3, 10/3, 7/2, and 5. This effect is explained and discussed using the screening theory.
Açıklama
Anahtar Kelimeler
2-dimensional electron-gas, edge channels, states, electrostatics
Kaynak
Physical Review B
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
102
Sayı
11
Künye
Peraticos, E., Kumar, S., Pepper, M., Siddiki, A., Farrer, I., Ritchie, D., Jones, G. ve Griffiths, J. (2020). Hall resistance anomalies in the integer and fractional quantum Hall regime. Physical Review B, American Physical Society. 102(11).
