TY - JOUR
T1 - Energy relaxation in edge modes in the quantum Hall effect
AU - Rosenblatt, Amir
AU - Konyzheva, Sofia
AU - Lafont, Fabien
AU - Schiller, Noam
AU - Park, Jinhong
AU - Snizhko, Kyrylo
AU - Heiblum, Moty
AU - Oreg, Yuval
AU - Umansky, Vladimir
N1 - We thank Ron Melcer, Yuval Gefen and Yigal Meir for insightful discussions. M.H. acknowledges the partial support of the Israeli Science Foundation (ISF), the Minerva foundation, and the European Research Council under the European Community’s Seventh Framework Program (FP7/2007– 2013)/ERC Grant agreement 339070. Y.O. acknowledge the partial support of the ERC under the European Union’s Horizon 2020 research and innovation programme (grant agreement LEGOTOP No 788715), the DFG CRC SFB/TRR183, the BSF and NSF (2018643), the ISF (1335/16), and the ISF MAFAT Quantum Science and Technology (2074/19). JP acknowledges funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Projektnummer 277101999 – TRR 183 (project A01). K.S. acknowledges funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Projektnummer 277101999 – TRR 183 (project C01), by the Minerva foundation, and by the German-Israel foundation (GIF). A.R., F.L., S.K. and M.H. designed the experiment. A.R. fabricated the device. A.R. S.K. performed the measurements. A.R. S.K and N.S. did the analysis. A.R., S.K., N.S., J.P., K.S., F.L., Y.O. and M.H. contributed to the theoretical model. V.U. grew the 2DEG heterostructure. All contributed to the write up of the manuscript.
PY - 2020/12/18
Y1 - 2020/12/18
N2 - Studies of energy flow in quantum systems complement the information provided by common conductance measurements. The quantum limit of heat flow in one dimensional (1D) ballistic modes was predicted, and experimentally demonstrated, to have a universal value for bosons, fermions, and fractionally charged anyons. A fraction of this value is expected in non-abelian states. Nevertheless, open questions about energy relaxation along the propagation length in 1D modes remain. Here, we introduce a novel experimental setup that measures the energy relaxation in chiral 1D modes of the quantum Hall effect (QHE). Edge modes, emanating from a heated reservoir, are partitioned by a quantum point contact (QPC) located at their path. The resulting noise allows a determination of the 'effective temperature' at the location of the QPC. We found energy relaxation in all the tested QHE states, being integers or fractional. However, the relaxation was found to be mild in particle-like states, and prominent in hole-conjugate states.
AB - Studies of energy flow in quantum systems complement the information provided by common conductance measurements. The quantum limit of heat flow in one dimensional (1D) ballistic modes was predicted, and experimentally demonstrated, to have a universal value for bosons, fermions, and fractionally charged anyons. A fraction of this value is expected in non-abelian states. Nevertheless, open questions about energy relaxation along the propagation length in 1D modes remain. Here, we introduce a novel experimental setup that measures the energy relaxation in chiral 1D modes of the quantum Hall effect (QHE). Edge modes, emanating from a heated reservoir, are partitioned by a quantum point contact (QPC) located at their path. The resulting noise allows a determination of the 'effective temperature' at the location of the QPC. We found energy relaxation in all the tested QHE states, being integers or fractional. However, the relaxation was found to be mild in particle-like states, and prominent in hole-conjugate states.
UR - http://www.scopus.com/inward/record.url?scp=85098119650&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevLett.125.256803
DO - https://doi.org/10.1103/PhysRevLett.125.256803
M3 - مقالة
C2 - 33416348
SN - 0031-9007
VL - 125
JO - Physical review letters
JF - Physical review letters
IS - 25
M1 - 256803
ER -