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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Edge-State Wave Functions from Momentum-Conserving Tunneling Spectroscopy

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Author(s):
Patlatiuk, T. [1] ; Scheller, C. P. [1] ; Hill, D. [2] ; Tserkovnyak, Y. [2] ; Egues, J. C. [3] ; Barak, G. [4] ; Yacoby, A. [4] ; Pfeiffer, L. N. [5] ; West, K. W. [5] ; Zumbuehl, D. M. [1]
Total Authors: 10
Affiliation:
[1] Univ Basel, Dept Phys, Klingelbergstr 82, CH-4056 Basel - Switzerland
[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 - USA
[3] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[4] Harvard Univ, Dept Phys, Cambridge, MA 02138 - USA
[5] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 - USA
Total Affiliations: 5
Document type: Journal article
Source: Physical Review Letters; v. 125, n. 8 AUG 21 2020.
Web of Science Citations: 0
Abstract

We perform momentum-conserving tunneling spectroscopy using a GaAs cleaved-edge overgrowth quantum wire to investigate adjacent quantum Hall edge states. We use the lowest five wire modes with their distinct wave functions to probe each edge state and apply magnetic fields to modify the wave functions and their overlap. This reveals an intricate and rich tunneling conductance fan structure which is succinctly different for each of the wire modes. We self-consistently solve the Poisson-Schrodinger equations to simulate the spectroscopy, reproducing the striking fans in great detail, thus, confirming the calculations. Further, the model predicts hybridization between wire states and Landau levels, which is also confirmed experimentally. This establishes momentum-conserving tunneling spectroscopy as a powerful technique to probe edge state wave functions. (AU)

FAPESP's process: 16/50200-4 - Quantum correction to the conductivity of 2D electron gases near the Rashba-Dresselhaus SU(2) sysmmetry point
Grantee:José Carlos Egues de Menezes
Support type: Regular Research Grants
FAPESP's process: 16/08468-0 - Topological insulators and Majorana fermions
Grantee:José Carlos Egues de Menezes
Support type: Regular Research Grants