期刊
PHYSICAL REVIEW LETTERS
卷 121, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.167002
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资金
- French Agence Nationale de la Recherche [AF-12-BS04-0012-01]
- Laboratoire d'excellence LANEF [ANR-10-LABX-51-01]
- Canadian Institute for Advanced Research (CIFAR)
- Natural Sciences and Engineering Research Council of Canada (NSERC) [123817]
- Fonds de recherche du Quebec-Nature et Technologies (FRQNT)
- Canada Foundation for Innovation (CFI)
- Canada Research Chair
- Canada First Research Excellence Fund
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF5306]
- Slovak Research and Development Agency [APVV-16-0372]
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 stabilization of a pair-density wave state, which calls for further investigation in this region of the phase diagram.
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