Decoupling of the many-body effects from the electron mass in GaAs by means of reduced dimensionality
Decoupling of the many-body effects from the electron mass in GaAs by means of reduced dimensionality
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通过降维解耦 GaAs 中电子质量的多体效应
DOI:
10.1103/physrevb.107.115128
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发表时间:
2023
影响因子:
3.7
通讯作者:
Vianez P
中科院分区:
文献类型:
--
作者:
Vianez P
Determining the (bare) electron massin crystals is often hindered by many-body effects since Fermi-liquid physics renormalizes the band mass, making the observed effective massdepend on density. Here, we use a one-dimensional (1D) geometry to amplify the effect of interactions, forcing the electrons to form a nonlinear Luttinger liquid with separate holon and spinon bands, therefore separating the interaction effects from. Measuring the spectral function of gated quantum wires formed in GaAs by means of magnetotunnelling spectroscopy and interpreting them using the 1D Fermi-Hubbard model, we obtainin this material, whereis the free-electron mass. By varying the density in the wires, we change the interaction parameterin the range from–4 and show thatremains constant. The determined value ofislighter than observed in GaAs in geometries of higher dimensionality(), consistent with the quasiparticle picture of a Fermi liquid that makes electrons heavier in the presence of interactions.
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作者:
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Haule, Kristjan
DOI:
10.48550/arxiv.1511.02902
发表时间:
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期刊:
--
影响因子:
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DOI:
--
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