Print Email Facebook Twitter Electron-electron interactions and the paired-to-nematic quantum phase transition in the second Landau level Title Electron-electron interactions and the paired-to-nematic quantum phase transition in the second Landau level Author Schreiber, K. A. (Purdue University) Samkharadze, Nodar (TU Delft QCD/Vandersypen Lab; Purdue University) Gardner, G. C. (Purdue University) Lyanda-Geller, Y. (Purdue University) Manfra, M. J. (Purdue University) Pfeiffer, L. N. (Princeton University) West, K. W. (Princeton University) Csáthy, G. A. (Purdue University) Date 2018-12-01 Abstract In spite of its ubiquity in strongly correlated systems, the competition of paired and nematic ground states remains poorly understood. Recently such a competition was reported in the two-dimensional electron gas at filling factor ν = 5/2. At this filling factor a pressure-induced quantum phase transition was observed from the paired fractional quantum Hall state to the quantum Hall nematic. Here we show that the pressure-induced paired-to-nematic transition also develops at ν = 7/2, demonstrating therefore this transition in both spin branches of the second orbital Landau level. However, we find that pressure is not the only parameter controlling this transition. Indeed, ground states consistent with those observed under pressure also develop in a sample measured at ambient pressure, but in which the electron-electron interaction was tuned close to its value at the quantum critical point. Our experiments suggest that electron-electron interactions play a critical role in driving the paired-to-nematic transition. To reference this document use: http://resolver.tudelft.nl/uuid:becf9a2d-ed6d-46f3-9162-c1716cabbfe8 DOI https://doi.org/10.1038/s41467-018-04879-1 ISSN 2041-1723 Source Nature Communications, 9 (1) Part of collection Institutional Repository Document type journal article Rights © 2018 K. A. Schreiber, Nodar Samkharadze, G. C. Gardner, Y. Lyanda-Geller, M. J. Manfra, L. N. Pfeiffer, K. W. West, G. A. Csáthy Files PDF s41467_018_04879_1_1.pdf 1013.05 KB Close viewer /islandora/object/uuid:becf9a2d-ed6d-46f3-9162-c1716cabbfe8/datastream/OBJ/view