Мақола

Evolution of the cyclotron mass with doping in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Anaëlle LegrosDepartment of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, USAK. W. PostNational High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAPrashant ChauhanDepartment of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, USAD.G. RickelNational High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAXi HeBrookhaven National Laboratory, Upton, New York 11973, USAXiaotao XuBrookhaven National Laboratory, Upton, New York 11973, USAXiaoyan ShiDepartment of Physics, The University of Texas at Dallas, Richardson, Texas 75080-3021, USAI. BožovićBrookhaven National Laboratory, Upton, New York 11973, USAS. A. CrookerNational High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAN. P. ArmitageCanadian Institute for Advanced Research, Toronto, Ontario, Canada M5G 1Z8

2022lv

ABI

Аннотация

The recent observation of cyclotron resonance in optimally doped La${}_{2\ensuremath{-}x}$Sr${}_{x}$CuO${}_{4}$ using terahertz spectroscopy in a high magnetic field has opened new possibilities for the study of cuprate superconductors. Here, the authors measured cyclotron resonance from slightly underdoped to highly overdoped samples. The cyclotron mass is monotonically increasing and positive for all dopings and with a magnitude systematically below the heat capacity mass for under and optimally doped samples, while exceeding it for overdoped samples. These results are surprising as photoemission reveals a Lifshitz transition in the middle of the doping range. The sign of the cyclotron mass determined from a finite frequency resonance is, in conventional theories, a topological quantity only sensitive to whether or not the Fermi surface is closed around holes or electrons. These results should provide motivation to investigate the cyclotron resonance in non-Fermi liquids and systems with strong anisotropic scattering.

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Идентификаторлар

DOI: 10.1103/physrevb.106.195110

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