Abstract
A grand challenge in many-body quantum physics is to explain the apparent connection between quantum criticality and high-temperature superconductivity in the cuprates and similar systems, such as the iron pnictides and chalcogenides. Here we argue that the quantum-critical regime plays an essential role in activating a strong-pairing mechanism: although pairing bosons create a symmetry-breaking instability which suppresses pairing, the combination of these broken-symmetry states within the critical regime can restore this symmetry for the paired quasiparticles. This condition is shown to be met within a large-U ansatz. A hidden quantum phase transition then arises between a Fermi-liquid and a non-Fermi-liquid broken-symmetry striped state, and a critical regime in which the broken-symmetry states are combined.
| Original language | English (US) |
|---|---|
| Article number | 47011 |
| Journal | EPL |
| Volume | 98 |
| Issue number | 4 |
| DOIs | |
| State | Published - May 2012 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Pairing glue activation in cuprates within the quantum critical regime. / Ashkenazi, Josef; Johnson, Neil F.
In: EPL, Vol. 98, No. 4, 47011, 05.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pairing glue activation in cuprates within the quantum critical regime
AU - Ashkenazi, Josef
AU - Johnson, Neil F
PY - 2012/5
Y1 - 2012/5
N2 - A grand challenge in many-body quantum physics is to explain the apparent connection between quantum criticality and high-temperature superconductivity in the cuprates and similar systems, such as the iron pnictides and chalcogenides. Here we argue that the quantum-critical regime plays an essential role in activating a strong-pairing mechanism: although pairing bosons create a symmetry-breaking instability which suppresses pairing, the combination of these broken-symmetry states within the critical regime can restore this symmetry for the paired quasiparticles. This condition is shown to be met within a large-U ansatz. A hidden quantum phase transition then arises between a Fermi-liquid and a non-Fermi-liquid broken-symmetry striped state, and a critical regime in which the broken-symmetry states are combined.
AB - A grand challenge in many-body quantum physics is to explain the apparent connection between quantum criticality and high-temperature superconductivity in the cuprates and similar systems, such as the iron pnictides and chalcogenides. Here we argue that the quantum-critical regime plays an essential role in activating a strong-pairing mechanism: although pairing bosons create a symmetry-breaking instability which suppresses pairing, the combination of these broken-symmetry states within the critical regime can restore this symmetry for the paired quasiparticles. This condition is shown to be met within a large-U ansatz. A hidden quantum phase transition then arises between a Fermi-liquid and a non-Fermi-liquid broken-symmetry striped state, and a critical regime in which the broken-symmetry states are combined.
UR - http://www.scopus.com/inward/record.url?scp=84861693467&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861693467&partnerID=8YFLogxK
U2 - 10.1209/0295-5075/98/47011
DO - 10.1209/0295-5075/98/47011
M3 - Article
AN - SCOPUS:84861693467
VL - 98
JO - Europhysics Letters
JF - Europhysics Letters
SN - 0295-5075
IS - 4
M1 - 47011
ER -