Abstract
When superconducting (SC) and charge-density-wave (CDW) orders compete, novel low-temperature behaviors can result. From an analysis of the Landau-Ginzburg-Wilson theory of competing orders, we demonstrate the generic occurrence of a “fragile” SC phase at low temperatures and high fields in the presence of weak disorder. Here, the SC order is largely concentrated in the vicinity of dilute dislocations in the CDW order, leading to transition temperatures and critical currents that are parametrically smaller than those characterizing the zero-field SC phase. This may provide the outline of an explanation of the recently discovered “resilient” superconducting phase at high fields in underdoped .
- Received 6 October 2018
- Revised 18 March 2019
DOI:https://doi.org/10.1103/PhysRevB.99.144513
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