SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: Poster Session: Correlated Electrons
TT 9.9: Poster
Dienstag, 28. September 2021, 13:30–16:00, P
Quadrature Magnetoresistance from Impeded Cyclotron Motion — •Roemer Hinlopen1, Stijn Hinlopen2, Jake Ayres1, and Nigel Hussey1, 3 — 1University of Bristol, United Kingdom — 2Fudura B.V., Netherlands — 3High Field Magnet Laboratory (HFML-EMFL), Netherlands
Recently, quadratic to linear magnetoresistance (MR) as a function of magnetic field has emerged as a pervasive phenomenon among strange and quantum critical metals. Examples are the antiferromagnetic quantum critical metal BaFe2(As,P)2 (1), heavy fermion (Yb,La)Rh2Si2 (2) and optimally and overdoped cuprates (Nd-)LSCO (3,4), Tl-2201 and Bi-2201 (5) as well as electron doped LCCO (6). Given the variety of Fermi surface topologies, dominant interactions and energy scales in these systems, the striking similarity of their magnetic-field response suggests some universal, but as yet unidentified, organizing principle. Here, we propose a new, simple theory to explain this phenomenology based on impeded cyclotron motion. We reproduce the quadrature form and show a high level of robustness to scattering and correlation effects. The unsaturating nature of the MR is found even in the high field limit. We predict this model also explains the magnetoresistance observed in charge density wave systems such as the dichalcogenides.
[1] Nat. Phys. 12:916-919 (2016)
[2] Physica B: Cond. Matt. 378-380:72-73 (2006)
[3] Science 361:6401 (2018)
[4] G. Grissonnanche arXiv:2011.13054 (2020)
[5] J. Ayres et al. Nature (in press)
[6] Sci. Adv. 5:5, eaav6753 (2019)