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Bulk odd-frequency ...
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Tamura, ShunNagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan.
(författare)
Bulk odd-frequency pairing in the superconducting Su-Schrieffer-Heeger model
- Artikel/kapitelEngelska2020
Förlag, utgivningsår, omfång ...
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2020
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LIBRIS-ID:oai:DiVA.org:uu-418206
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-418206URI
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https://doi.org/10.1103/PhysRevB.101.214507DOI
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Språk:engelska
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Sammanfattning på:engelska
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The Su-Schrieffer-Heeger model describes fermions that hop on a one-dimensional chain with staggered hopping amplitude, where the unit cell contains two sites, or two sublattices. In this work we consider the Su-Schrieffer-Heeger model with superconducting pairing and show that the sublattice index acts as an additional quantum number in the classification of Cooper pairs, giving rise to inter- and intrasublattice odd-frequency pair correlations in the bulk. Interestingly, this system behaves as a two-band superconductor where the bulk odd-frequency correlations depend solely on the intrinsic staggering properties of the model. In general, odd-frequency correlations coexist with even-frequency correlations in both the trivial and topological phases, with comparable and even larger odd-frequency amplitudes at the topological phase transition points at low frequencies, due to the closing of the energy gap at these points. Furthermore, we also discuss how bulk odd-frequency amplitudes are correlated with pseudogaps in the density of states and also with a charge density wave that appears due to the chemical potential imbalance between sublattices.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Nakosai, ShoNagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan.
(författare)
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Black-Schaffer, Annica M.Uppsala universitet,Materialteori(Swepub:uu)annsc679
(författare)
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Tanaka, YukioNagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan.
(författare)
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Cayao, JorgeUppsala universitet,Materialteori(Swepub:uu)jorca487
(författare)
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Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan.Materialteori
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physical Review B101:212469-99502469-9969
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