Magnetic phase diagram of underdoped YBa 2 Cu 3 O y inferred from torque magnetization and thermal conductivity
| Autor: | Benjamin Lawson, John Singleton, Gang Li, Tian Liang, Juan Porras, Tomoya Asaba, Gregory S. Boebinger, Lu Li, Max Hirschberger, N. Phuan Ong, Bernhard Keimer, Toshinao Loew, Fan Yu, J. B. Kemper |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Multidisciplinary Field (physics) Condensed matter physics Scattering Condensed Matter - Superconductivity FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Vortex Superconductivity (cond-mat.supr-con) Magnetization Condensed Matter::Superconductivity Phase (matter) Physical Sciences 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Cuprate 010306 general physics 0210 nano-technology Critical field |
| Zdroj: | Proceedings of the National Academy of Sciences. 113:12667-12672 |
| ISSN: | 1091-6490 0027-8424 |
| DOI: | 10.1073/pnas.1612591113 |
| Popis: | Strong evidence for charge-density correlation in the underdoped phase of the cuprate YBa2Cu3Oy was obtained by nuclear magnetic resonance (NMR) and resonant x-ray scatter- ing. The fluctuations were found to be enhanced in strong magnetic fields. Recently, 3D (three dimensional) charge-density wave (CDW) formation with long-range order (LRO) was observed by x-ray diffraction in H >15 T. To elucidate how the CDW transition impacts the pair condensate, we have used torque magnetization to 45 T and thermal conductivity $\kappa_{xx}$ to construct the magnetic phase diagram in untwinned crystals with hole density p = 0.11. We show that the 3D CDW transitions appear as sharp features in the susceptibility and $\kappa_{xx}$ at the fields HK and Hp, which define phase boundaries in agreement with spectroscopic techniques. From measurements of the melting field Hm(T) of the vortex solid, we obtain evidence for two vortex solid states below 8 K. At 0.5 K, the pair condensate appears to adjust to the 3D CDW by a sharp transition at 24 T between two vortex solids with very different shear moduli. At even higher H (42 T) the second vortex solid melts to a vortex liquid which survives to fields well above 45 T. de Haas-van Alphen oscillations appear at fields 24-28 T, below the lower bound for the upper critical field Hc2. Comment: 7 pages, 8 figures; New version of previous posting, reporting torque measurements to 45 Tesla and final magnetic phase diagram |
| Databáze: | OpenAIRE |
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