Abstract
We argue that the pseudogap phase may be an attribute of the non-BCS pairing of quantum-critical, diffusive fermions near the antiferromagnetic quantum critical point. We derive and solve a set of three coupled Eliashberg-type equations for spin-mediated pairing and show that in some Τ range below the pairing instability, there is no feedback from superconductivity on fermionic excitations, and fermions remain diffusive despite of the pairing. We conject that in this regime, fluctuations of the pairing gap destroy the superconducting condensate but preserve the leading edge gap in the fermionic spectral function.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 369-375 |
| Number of pages | 7 |
| Journal | Europhysics Letters |
| Volume | 55 |
| Issue number | 3 |
| DOIs | |
| State | Published - Aug 1 2001 |
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Quantum-critical superconductivity in underdoped cuprates. / Abanov, Ar; Chubukov, A. V.; Schmalian, J.
In: Europhysics Letters, Vol. 55, No. 3, 01.08.2001, p. 369-375.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quantum-critical superconductivity in underdoped cuprates
AU - Abanov, Ar
AU - Chubukov, A. V.
AU - Schmalian, J.
PY - 2001/8/1
Y1 - 2001/8/1
N2 - We argue that the pseudogap phase may be an attribute of the non-BCS pairing of quantum-critical, diffusive fermions near the antiferromagnetic quantum critical point. We derive and solve a set of three coupled Eliashberg-type equations for spin-mediated pairing and show that in some Τ range below the pairing instability, there is no feedback from superconductivity on fermionic excitations, and fermions remain diffusive despite of the pairing. We conject that in this regime, fluctuations of the pairing gap destroy the superconducting condensate but preserve the leading edge gap in the fermionic spectral function.
AB - We argue that the pseudogap phase may be an attribute of the non-BCS pairing of quantum-critical, diffusive fermions near the antiferromagnetic quantum critical point. We derive and solve a set of three coupled Eliashberg-type equations for spin-mediated pairing and show that in some Τ range below the pairing instability, there is no feedback from superconductivity on fermionic excitations, and fermions remain diffusive despite of the pairing. We conject that in this regime, fluctuations of the pairing gap destroy the superconducting condensate but preserve the leading edge gap in the fermionic spectral function.
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UR - http://www.scopus.com/inward/citedby.url?scp=0035413530&partnerID=8YFLogxK
U2 - 10.1209/epl/i2001-00425-9
DO - 10.1209/epl/i2001-00425-9
M3 - Article
VL - 55
SP - 369
EP - 375
JO - EPL
JF - EPL
SN - 0295-5075
IS - 3
ER -