Rpa orbital-fluctuation-mediated s++ pairing
WebApr 1, 2024 · In addition, we uncover that moderate bond-order fluctuations mediate sizable pairing glue, and this mechanism gives rise to both singlet s-wave and triplet p-wave superconductivity. Furthermore, characteristic pressure-induced phase transitions in CsV 3 Cb 5 are naturally understood by the present theory. WebApr 1, 2012 · For both cases with s + + - and s ±-wave superconductivities, the RPA result of T c is always higher than that of T s (= T Q) and/or T N, where the orbital and/or the …
Rpa orbital-fluctuation-mediated s++ pairing
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WebThese fluctuations give rise to the strong pairing interaction for the s-wave superconducting (SC) state without sign reversal (s++-wave state), which is consistent with experimentally observed robustness of superconductivity against impurities. WebD Summary K x Fe 2-y Se 2 different from other Fe based SC missing hole-pocket makes s-wave instability less likely (spin-fluctuation theory), dominant d x2-y2 wave symmetry quasinodes (vertical or horizontal) small hybridization regime also with spin-orbit coupling differences to experimental results – small effect of Z-centered hole pockets – …
WebRemarkably, the s++-pairing phase due to the orbital fluctuation is largely expanded relative to the RPA result, while the s+--pairing phase due to the magnetic fluctuation is reduced. We investigate the electronic state and the superconductivity in the 5-orbital Hubbard model for iron pnictides by using the dynamical mean-field theory in ... WebBoth the spin fluctuation mediated S+- wave state and the orbital fluctuation mediated S++ wave state have been studied in various Fe-based superconductors. In BaFe2(As,P)2, the spin fluctuation theory predicts that the horizontal node appears on the hole like Fermi surface composed of z2 orbital [1].
WebOct 28, 2013 · Remarkably, the s++-pairing phase due to the orbital fluctuation is largely expanded relative to the RPA result, while the s+--pairing phase due to the magnetic … WebWe study the pairing mechanism in iron pnictide superconductors based on the five-orbital Hubbard-Holstein model. Due to Fe-ion oscillations, the s -wave superconducting (SC) state without sign reversal (s++ -wave state) is induced by orbital fluctuations by using realistic model parameters.
WebDec 11, 2009 · When the intraorbital repulsion U is larger than the interorbital one U', an extended s-wave (s+--wave) pairing with sign reversal of order parameter is mediated by …
WebBoth the spin fluctuation mediated S+- wave state and the orbital fluctuation mediated S++ wave state have been studied in various Fe-based superconductors. In BaFe2(As,P)2, the spin fluctuation theory predicts that the horizontal node appears on the hole like Fermi surface composed of z2 orbital. In contrast, fully-gapped s++ wave state is obtained … day spa in wesley chapel floridaWebRemarkably, the s++-pairing phase due to the orbital fluctuation is largely expanded relative to the RPA result, while the s+--pairing phase due to the magnetic fluctuation is reduced. Full PDF gcf of 3 11 and 6WebMar 21, 2012 · The hallmark of the orbital-fluctuations-mediated-by-phonons scenario is the s++ order parameter, i.e., the superconducting gap of one sign for the whole BZ. According to the authors of [ 13 ], this superconducting state is likely to be realized exactly in electron-doped IBSC even without impurities (see Figure 4 c in [ 13 ]). gcf of 30y 3 and 20y 2WebDec 12, 2009 · When the intraorbital repulsion U is larger than the interorbital one U', an extended s-wave (s+--wave) pairing with sign reversal of order parameter is mediated by … day spa in south bend indianaWebJul 3, 2014 · Here, we study the five-orbital model of LiFeAs based on the recently developed orbital-spin fluctuation theories. It is found that the experimentally observed gap structure of LiFeAs, which is a “fingerprint” of the pairing mechanism, is quantitatively reproduced in terms of the orbital-fluctuation-mediated s++ -wave state. day spa in whitbyWebOct 28, 2013 · Remarkably, the s++-pairing phase due to the orbital fluctuation is largely expanded relative to the RPA result, while the s+--pairing phase due to the magnetic fluctuation is reduced. Submission history From: Jun Ishizuka [ view email ] [v1] Mon, 28 … day spa jersey city njWebOrbital-Fluctuation-Mediated Superconductivity . in Iron Pnictide Superconductors. Hiroshi Kontani (Nagoya Univ.) in collaboration with. Tetsuro Saito (Nagoya Univ.) Seiichro Onari (Nagoya Univ.) CONTENTS. 1. Why we study S++ wave state? ・impurity effect. 2. orbital-fluctuation theory ・a natural model for orbital fluctuations ・As-Fe-As ... gcf of 31 and 11