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• W2261566754 abstract "Charge fractionalization is a possible emergent excitation in a low-dimensional system of interacting electrons. A known example is that of fractional charges in the fractional quantum Hall effect (FQHE) regime, which is a consequence of strong Coulomb interaction among the electrons whose kinetic energy is quenched by the strong magnetic field. Alternatively, the integer QHE (IQHE), with electrons behaving largely as independent particles in Landau levels (LLs), lacks such fractionalization. However, for integer LLs filling v=2, 3,... electrons propagate in copropagating adjacent chiral edge channels, and thus interact and modify the non-interacting LLs. For example, at v=2, an electron injected selectively into a single non-interacting (bare) edge channel is expected to decompose into a 'fast' mode and a 'slow' mode in the region of interaction; each mode carry fractional charges shared between the two bare channels. Here, we report our sensitive shot noise measurement that affirms the presence of such fractionalization in v=2. Injecting partitioned current into a 'hot' edge channel led to low frequency shot noise in the adjacent currentless 'cold' edge channel after it had been partitioned. Controlling the partitioning of the hot and cold channels allowed a determination of the fractional charges in both channels as well as the channels' velocity difference. This approach can be easily extended to study interaction in two-dimensional systems with a topology dictating edge channels transport." @default.
• W2261566754 created "2016-06-24" @default.
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• W2261566754 date "2013-10-02" @default.
• W2261566754 modified "2023-09-27" @default.
• W2261566754 title "Fractional charges in emergent neutral modes at the integer quantum Hall effect" @default.
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