Abstract
In underdoped cuprates, an incommensurate charge density wave (CDW) order is known to coexist with superconductivity. A dip in at the hole doping level where the CDW is strongest () suggests that CDW order may suppress superconductivity. We investigate the interplay of charge order with superconductivity in underdoped by measuring the temperature dependence of the Hall coefficient at high magnetic field and at high hydrostatic pressure. We find that, although pressure increases by up to 10 K at 2.6 GPa, it has very little effect on . This suggests that pressure, at these levels, only weakly affects the CDW and that the increase in with pressure cannot be attributed to a suppression of the CDW. We argue, therefore, that the dip in at at ambient pressure is probably not caused by the CDW formation.
- Received 21 July 2017
DOI:https://doi.org/10.1103/PhysRevLett.120.117002
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