In the Emery model, the maximum superconducting critical temperature increases with copper-oxygen energy distance at fixed charge gap, correlating with increased oxygen hole content and deeper charge-transfer character.
Beyond the conventional Emery model: crucial role of long-range hopping for cuprate superconductivity
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abstract
The Emery model is the quintessential model for cuprate superconductors. In his eponymous paper, Emery only considered the next-nearest-neighbor oxygen-copper hopping. Later, also the relevance of nearest- and next-nearest oxygen-oxygen hoppings has been pointed out. Using dynamical vertex approximation, we find a superconducting dome consistent with cuprates. However, long-range hoppings beyond the three conventional hopping parameters are necessary for the quantitatively correct phase diagram and for a proper d-wave order parameter.
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Long-range hoppings beyond the conventional three parameters are necessary in the Emery model for a quantitatively correct superconducting phase diagram and proper d-wave order parameter, as shown with dynamical vertex approximation.
CDMFT calculations on the Emery model show that charge-transfer gap size and oxygen hole content are two independent mechanisms controlling the maximum superconducting Tc, with oxygen hole content being the dominant driver.
citing papers explorer
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Correlation of maximum superconducting critical temperature with copper-oxygen energy distance and oxygen hole content in the Emery model
In the Emery model, the maximum superconducting critical temperature increases with copper-oxygen energy distance at fixed charge gap, correlating with increased oxygen hole content and deeper charge-transfer character.
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Beyond the conventional Emery model: crucial role of long-range hopping for cuprate superconductivity
Long-range hoppings beyond the conventional three parameters are necessary in the Emery model for a quantitatively correct superconducting phase diagram and proper d-wave order parameter, as shown with dynamical vertex approximation.
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Charge-transfer gap size and oxygen hole content as two mechanisms controlling $T_c$ in the Emery model
CDMFT calculations on the Emery model show that charge-transfer gap size and oxygen hole content are two independent mechanisms controlling the maximum superconducting Tc, with oxygen hole content being the dominant driver.