Dominant end-tunneling effect in two distinct Luttinger liquids coexisting in one quantum wire.

ABSTRACT: Luttinger liquids occupy a notable place in physics as one of the most understood classes of quantum many-body systems. The experimental mission of measuring its main prediction, power laws in observable quantities, has already produced a body of exponents in different semiconductor and metallic structures. Here, we combine tunneling spectroscopy with density-dependent transport measurements in the same quantum wires over more than two orders of magnitude in temperature to very low electron temperatures down to ∼40 mK. This reveals that, when the second 1D subband becomes populated, the temperature dependence splits into two ranges with different exponents in the power-law dependence of the conductance, both dominated by the finite-size effect of the end-tunneling process. This result demo

SUBMITTER: Weldeyesus H 

PROVIDER: S-EPMC12310979 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature