Publication Date:
2019
Description:
〈p〉High magnetic fields suppress cuprate superconductivity to reveal an unusual density wave (DW) state coexisting with unexplained quantum oscillations. Although routinely labeled a charge density wave (CDW), this DW state could actually be an electron-pair density wave (PDW). To search for evidence of a field-induced PDW, we visualized modulations in the density of electronic states 〈i〉N〈/i〉(〈i〉r〈/i〉) within the halo surrounding Bi〈sub〉2〈/sub〉Sr〈sub〉2〈/sub〉CaCu〈sub〉2〈/sub〉O〈sub〉8〈/sub〉 vortex cores. We detected numerous phenomena predicted for a field-induced PDW, including two sets of particle-hole symmetric 〈i〉N〈/i〉(〈i〉r〈/i〉) modulations with wave vectors 〈b〉〈i〉Q〈sub〉P〈/sub〉〈/i〉〈/b〉 and 〈b〉2〈i〉Q〈/i〉〈sub〉P〈/sub〉〈/b〉, with the latter decaying twice as rapidly from the core as the former. These data imply that the primary field-induced state in underdoped superconducting cuprates is a PDW, with approximately eight CuO〈sub〉2〈/sub〉 unit-cell periodicity and coexisting with its secondary CDWs.〈/p〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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