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Pascal conductance series in ballistic one-dimensional LaAlO3/SrTiO3 channels
Science ( IF 41.037 ) Pub Date : 2020-02-14 , DOI: 10.1126/science.aat6467
Megan Briggeman, Michelle Tomczyk, Binbin Tian, Hyungwoo Lee, Jung-Woo Lee, Yuchi He, Anthony Tylan-Tyler, Mengchen Huang, Chang-Beom Eom, David Pekker, Roger S. K. Mong, Patrick Irvin, Jeremy Levy

One-dimensional electronic systems can support exotic collective phases because of the enhanced role of electron correlations. We describe the experimental observation of a series of quantized conductance steps within strongly interacting electron waveguides formed at the lanthanum aluminate–strontium titanate (LaAlO3/SrTiO3) interface. The waveguide conductance follows a characteristic sequence within Pascal’s triangle: (1, 3, 6, 10, 15, …) ⋅ e2/h, where e is the electron charge and h is the Planck constant. This behavior is consistent with the existence of a family of degenerate quantum liquids formed from bound states of n = 2, 3, 4, … electrons. Our experimental setup could provide a setting for solid-state analogs of a wide range of composite fermionic phases.
更新日期:2020-02-13

 

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