Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells

[2507.00565] Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Condensed Matter > Mesoscale and Nanoscale Physics arXiv:2507.00565 (cond-mat) [Submitted on 1 Jul 2025 ( v1 ), last revised 26 Mar 2026 (this version, v2)] Title: Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells Authors: S. Ruffenach , S. S. Krishtopenko , A. V. Ikonnikov , C. Consejo , J. Torres , X. Baudry , P. Ballet , B. Jouault , F. Teppe View a PDF of the paper titled Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells, by S. Ruffenach and 7 other authors View PDF HTML (experimental) Abstract: We present far-infrared magnetospectroscopy measurements of a HgTe quantum well in the inverted band structure regime over the temperature range of 2 to 60 K. The particularly low electron concentration enables us to probe the temperature evolution of all four possible optical transitions originating from zero-mode Landau levels, which are split off from the edges of the electron-like and hole-like bands. By analyzing their resonance energies, we reveal an unambiguous breakdown of the single-particle picture indicating that the explanation of the anticrossing of zero-mode Landau levels in terms of bulk and interface inversion asymmetries is insufficient. Instead, the observed behavior of the optical transitions is well explained by their hybridization driven by electron-electron interaction. We emphasize that our proposed many-particle mechanism is intrinsic to HgTe quantum wells of any crystallographic orientation, including (110) and (111) wells, where bulk and interface inversion asymmetries do not induce the anticrossing of zero-mode Landau levels. Comments: 7 pages, 4 figures and Supplemental materials Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ; Materials Science (cond-mat.mtrl-sci) Cite as: arXiv:2507.00565 [cond-mat.mes-hall] (or arXiv:2507.00565v2 [cond-mat.mes-hall] for this version) https://doi.org/10.48550/arXiv.2507.00565 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Phys. Rev. B 113, L161108 (2026) Related DOI : https://doi.org/10.1103/1c3q-yps4 Focus to learn more DOI(s) linking to related resources Submission history From: Frederic Teppe [ view email ] [v1] Tue, 1 Jul 2025 08:32:53 UTC (2,343 KB) [v2] Thu, 26 Mar 2026 19:02:19 UTC (2,647 KB) Full-text links: Access Paper: View a PDF of the paper titled Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells, by S. 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