Superconducting state of Sr2RuO4 in the presence of longer-range Coulomb interactions
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Superconducting state of Sr2RuO4 in the presence of longer-range Coulomb interactions. / Romer, Astrid T.; Hirschfeld, P. J.; Andersen, Brian M.
I: Physical Review B, Bind 104, Nr. 6, 064507, 20.08.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Superconducting state of Sr2RuO4 in the presence of longer-range Coulomb interactions
AU - Romer, Astrid T.
AU - Hirschfeld, P. J.
AU - Andersen, Brian M.
PY - 2021/8/20
Y1 - 2021/8/20
N2 - The symmetry of the superconducting condensate in Sr2RuO4 remains controversial after recent experiments overturned the dominant chiral p-wave paradigm. We perform a theoretical study of pairing by spin- and chargefluctuations in Sr2RuO4, including the effects of spin-orbit coupling, and both local and longer-range Coulomb repulsion. The latter has important consequences for Sr2RuO4 due to the near-degeneracy of symmetry-distinct pairing states in this material. We find leading nodal s', d(xy), and helical (p) solutions, while both the g- and d(x2-y2)-wave channels remain noncompetitive. This suggests nodal time-reversal symmetry broken s'+ id(xy) or s,+ ip phases, promoted by longer-range Coulomb repulsion, as the most favorable candidates for Sr2RuO4. We analyze the properties of these states and show that the s'+ id(xy) solution agrees with the bulk of available experimental data.
AB - The symmetry of the superconducting condensate in Sr2RuO4 remains controversial after recent experiments overturned the dominant chiral p-wave paradigm. We perform a theoretical study of pairing by spin- and chargefluctuations in Sr2RuO4, including the effects of spin-orbit coupling, and both local and longer-range Coulomb repulsion. The latter has important consequences for Sr2RuO4 due to the near-degeneracy of symmetry-distinct pairing states in this material. We find leading nodal s', d(xy), and helical (p) solutions, while both the g- and d(x2-y2)-wave channels remain noncompetitive. This suggests nodal time-reversal symmetry broken s'+ id(xy) or s,+ ip phases, promoted by longer-range Coulomb repulsion, as the most favorable candidates for Sr2RuO4. We analyze the properties of these states and show that the s'+ id(xy) solution agrees with the bulk of available experimental data.
U2 - 10.1103/PhysRevB.104.064507
DO - 10.1103/PhysRevB.104.064507
M3 - Journal article
VL - 104
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 6
M1 - 064507
ER -
ID: 276905062