Enhanced superconductivity via layer differentiation in the trilayer Hubbard model

Xun Liu; Mi Jiang

doi:10.1103/n28s-ggzc

← Back to search

Enhanced superconductivity via layer differentiation in the trilayer Hubbard model

Xun Liu, Mi Jiang

DOI 10.1103/n28s-ggzc · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Motivated by the highest superconducting transition temperature (Tc) in multilayer cuprates, we investigated the trilayer Hubbard model by adopting large-scale dynamical cluster quantum Monte Carlo simulations. Focusing on the systems with hole dopings within the two outer layers (OLs) higher than the inner layer (IL), which is believed to be relevant to the realistic multilayer cuprates, our exploration discovered that the IL and OL manifest strong differentiation in a wide range of hole doping combinations. Specifically, the OLs remain metallic while the IL shows a distinct transition from the pseudogap to superconducting state. More importantly, the highest Tc of the composite trilayer system can be largely enhanced compared to the single layer model and the imbalanced hole dopings between IL and OL are generically beneficial for global superconductivity (SC). We further provide strong numerical evidence on the possibility of d-wave SC solely hosted in the IL. Our investigation provides insight into the origin of highest Tc in multilayer cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
HgBa2Ca2Cu3O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	134	Pressure unresolved	unknown
Bi2Sr2Ca2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	110	Pressure not reported	unknown
CuC-1234 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	117	Pressure not reported	unknown
CuC-1223 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	71	Pressure not reported	unknown
(Cu1-xTlx)Ba2Ca3Cu4O12-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	126	Pressure not reported	unknown