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Odd-frequency pair density wave correlations in underdoped cuprates
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- Chakraborty, Debmalya (author)
- Uppsala universitet,Materialteori,Kvantmateriens teori
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- Black-Schaffer, Annica M. (author)
- Uppsala universitet,Materialteori,Kvantmateriens teori
- (creator_code:org_t)
- 2021-03-04
- 2021
- English.
- In: New Journal of Physics. - : Institute of Physics Publishing (IOPP). - 1367-2630. ; 23:3
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Pair density waves, identified by Cooper pairs with finite center-of-mass momentum, have recently been observed in copper oxide based high T-c superconductors (cuprates). A charge density modulation or wave is also ubiquitously found in underdoped cuprates. Within a general mean-field one-band model we show that the coexistence of charge density waves (CDWs) and uniform superconductivity in d-wave superconductors like cuprates, generates an odd-frequency spin-singlet pair density wave, in addition to the even-frequency counterparts. The strength of the induced odd-frequency pair density wave depends on the modulation wave vector of the CDW, with the odd-frequency pair density waves even becoming comparable to the even-frequency ones in parts of the Brillouin zone. We show that a change in the modulation wave vector of the CDW from bi-axial to uni-axial, can enhance the odd-frequency component of the pair density waves. Such a coexistence of superconductivity and uni-axial CDW has already been experimentally verified at high magnetic fields in underdoped cuprates. We further discuss the possibility of an odd-frequency spin-triplet pair density wave generated in the coexistence regime of superconductivity and spin density waves, applicable to the iron-based superconductors. Our work thus presents a route to bulk odd-frequency superconductivity in high T-c superconductors.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- superconducitivity
- odd-frequency superconductivity
- pair density waves
- high temperature superconductors
Publication and Content Type
- ref (subject category)
- art (subject category)
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