Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session F07: Fractional Quantum Hall 2
11:15 AM–2:15 PM,
Tuesday, March 6, 2018
LACC Room: 153B
Sponsoring Unit: DCMP
Chair: Jeanie Lau, Ohio State University
Abstract: F07.00007 : Observation of Fractional Quantum Hall Effect in an InAs Quantum Well*
12:27 PM–12:39 PM
Md. Shafayat Hossain
Kevin Villegas Rosales
The InAs two-dimensional electron system is one of the prime candidates for hosting exotic quasiparticles such as Majorana fermions and parafermions that exhibit non-Abelian statistics. To fulfill its full promise, however, the system must be clean enough to show evidence of electron-electron interaction. Here we study a very low disorder, 24-nm-wide InAs quantum well with density of 7.8 × 1011 cm-2 and low-temperature mobility 1.8 × 106 cm2/Vs. The sample exhibits resolvable Shubnikov de Haas oscillations at magnetic field as low as ≈ 0.5 T (v = 68) and becomes spin-resolved at B > 0.9 T (v ≤ 37). At a temperature of ≈ 35 mK and B ≈ 24 T, we observe a deep minimum in longitudinal resistance, accompanied by a nearly quantized Hall plateau at filling factor v = 4/3. This observation places the InAs two-dimensional electron system among the few systems that exhibit fractional quantum Hall effect, and it is an important step towards the realization of exotic quasi-particles, such as parafermions, that are required for universal quantum computation.
*Work supported by NSF Grants (ECCS 1508925, DMR 1305691, and DMR 1709076), QuantEmX grants from ICAM and the Gordon and Betty Moore Foundation (GBMF5305), NSF Cooperative Agreement DMR 1157490 by the state of Florida and DOE.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
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