Unusual interplay between superconductivity and field-induced charge order in YBa2Cu3Oy

Abstract

We present a detailed study of the temperature (T) and magnetic field (H) dependence of the electronic density of states (DOS) at the Fermi level, as deduced from specific heat and Knight shift measurements in underdoped YBa2Cu3Oy. We find that the DOS becomes field-independent above a characteristic field H_{DOS} and that the H_{DOS}(T) line displays an unusual inflection near the onset of the long range 3D charge-density wave order. The unusual S-shape of H_{DOS}(T) is suggestive of two mutually-exclusive orders that eventually establish a form of cooperation in order to coexist at low T. On theoretical grounds, such a collaboration could result from the stabilisation of a pair-density wave state, which calls for further investigations in this region of the phase diagram

arXiv comment6 pages, 4 figures

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Cited by in corpus (31)

• The Physics of Pair Density Waves
• The remarkable underlying ground states of cuprate superconductors
• Thermodynamic signatures of quantum criticality in cuprates
• Cuprate superconductors as viewed through a striped lens
• Disorder raises the critical temperature of a cuprate superconductor
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• Ubiquitous Charge Order Correlations in High-Temperature Superconducting Cuprates
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• Calculations of Spin Fluctuation Spectral Functions ${\alpha }^{2}F$ in High-Temperature Superconducting Cuprates
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• Raman Response of the Charge Density Wave in Cuprate Superconductors
• From Heat Capacity to Coherence in Ultra-Narrow-Linewidth Solid-State Optical Emitters at Sub-Kelvin Temperatures