TY - JOUR
T1 - Synthesizing a ν=2/3 fractional quantum Hall effect edge state from counter-propagating ν=1 and ν=1/3 states
AU - Cohen, Yonatan
AU - Ronen, Yuval
AU - Yang, Wenmin
AU - Banitt, Daniel
AU - Park, Jinhong
AU - Heiblum, Moty
AU - Mirlin, Alexander D.
AU - Gefen, Yuval
AU - Umansky, Vladimir
N1 - We acknowledge Erez Berg, Yuval Oreg, Ady Stern, Dmitri Feldman, and Kyrylo Snizhko for fruitful discussions. We thank Diana Mahalu for her help in the E-beam processing, and Vitaly Hanin for his help in the ALD process. M.H. acknowledges the partial support of the Israeli Science Foundation (ISF)—no. 450/16, the Minerva foundation—712598, and the European Research Council under the European Community’s Seventh Framework Program (FP7/2007-2013)/ERC, No. 339070. Y.G acknowledges support by DFG grant No. MI 658/10-1, DFG grant No. RO 2247/81, CRC 183 of the DFG, ISF Grant No. 1349/14, Leverhulme Trust VP-2015-0005 and Italia–Israel project QUANTRA. J.P. acknowledges the Koshland Foundation support. Y.C., Y.R., and W.Y. contributed equally to this work in a heterostructure design, sample design, device fabrication, measurement setup, data acquisition, data analysis and interpretation, and writing of the paper. D.B. contributed to this work in a heterostructure design and sample design. M.H. contributed in a heterostructure design, sample design, data interpretation, and writing of the paper. J.P., A.D.M., and Y.G. contributed in the data interpretation and writing of the paper. V.U. contributed in a heterostructure design and molecular beam epitaxy growth.
PY - 2019/4/23
Y1 - 2019/4/23
N2 - Topological edge-reconstruction occurs in hole-conjugate states of the fractional quantum Hall effect. The frequently studied filling factor, ν = 2/3, was originally proposed to harbor two counter-propagating modes: a downstream v = 1 and an upstream v = 1/3. However, charge equilibration between these two modes always led to an observed downstream v = 2/3 charge mode accompanied by an upstream neutral mode. Here, we present an approach to synthetize a v = 2/3 edge mode from its basic counter-propagating charged constituents, allowing a controlled equilibration between the two counter-propagating charge modes. This platform is based on a carefully designed double-quantum-well, which hosts two populated electronic sub-bands (lower and upper), with corresponding filling factors, v l and v u . By separating the 2D plane to two gated intersecting halves, each with different fillings, counter-propagating chiral modes can be formed along the intersection line. Equilibration between these modes can be controlled with the top gates’ voltage and the magnetic field.
AB - Topological edge-reconstruction occurs in hole-conjugate states of the fractional quantum Hall effect. The frequently studied filling factor, ν = 2/3, was originally proposed to harbor two counter-propagating modes: a downstream v = 1 and an upstream v = 1/3. However, charge equilibration between these two modes always led to an observed downstream v = 2/3 charge mode accompanied by an upstream neutral mode. Here, we present an approach to synthetize a v = 2/3 edge mode from its basic counter-propagating charged constituents, allowing a controlled equilibration between the two counter-propagating charge modes. This platform is based on a carefully designed double-quantum-well, which hosts two populated electronic sub-bands (lower and upper), with corresponding filling factors, v l and v u . By separating the 2D plane to two gated intersecting halves, each with different fillings, counter-propagating chiral modes can be formed along the intersection line. Equilibration between these modes can be controlled with the top gates’ voltage and the magnetic field.
UR - http://www.scopus.com/inward/record.url?scp=85064904351&partnerID=8YFLogxK
U2 - 10.1038/s41467-019-09920-5
DO - 10.1038/s41467-019-09920-5
M3 - مقالة
C2 - 31015449
SN - 2041-1723
VL - 10
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1920
ER -