Plaquette versus ordinary d-wave pairing in the t '-Hubbard model on a width-4 cylinder
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Plaquette versus ordinary d-wave pairing in the t '-Hubbard model on a width-4 cylinder. / Chung, Chia-Min; Qin, Mingpu; Zhang, Shiwei; Schollwoeck, Ulrich; White, Steven R.; Simons Collaboration Many-Electron.
In: Physical Review B, Vol. 102, No. 4, 041106, 06.07.2020.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Plaquette versus ordinary d-wave pairing in the t '-Hubbard model on a width-4 cylinder
AU - Chung, Chia-Min
AU - Qin, Mingpu
AU - Zhang, Shiwei
AU - Schollwoeck, Ulrich
AU - White, Steven R.
AU - Simons Collaboration Many-Electron
PY - 2020/7/6
Y1 - 2020/7/6
N2 - The Hubbard model and its extensions are important microscopic models for understanding high-Tc superconductivity in cuprates. In the model with next-nearest-neighbor hopping t' (the t'-Hubbard model), pairing is strongly influenced by t'. In particular, a recent study on a width-4 cylinder observed quasi-long-range superconducting order, associated with a negative t', which was taken to imply superconductivity in the two-dimensional (2D) limit. In this work we study more carefully pairing in the width-4 t'-Hubbard model. We show that in this specific system, the pairing symmetry with t' < 0 is not the ordinary d-wave one would expect in the 2D limit. Instead we observe a so-called plaquette d-wave pairing. We show that the plaquette d-wave or its extension is difficult to generalize in other geometries, for example a 4-leg ladder with open boundaries or a width-6 cylinder. We find that a negative t' suppresses the conventional d-wave, leading to plaquette pairing. In contrast, a different t '' coupling acting diagonally on the plaquettes suppresses plaquette pairing, leading to conventional d-wave pairing.
AB - The Hubbard model and its extensions are important microscopic models for understanding high-Tc superconductivity in cuprates. In the model with next-nearest-neighbor hopping t' (the t'-Hubbard model), pairing is strongly influenced by t'. In particular, a recent study on a width-4 cylinder observed quasi-long-range superconducting order, associated with a negative t', which was taken to imply superconductivity in the two-dimensional (2D) limit. In this work we study more carefully pairing in the width-4 t'-Hubbard model. We show that in this specific system, the pairing symmetry with t' < 0 is not the ordinary d-wave one would expect in the 2D limit. Instead we observe a so-called plaquette d-wave pairing. We show that the plaquette d-wave or its extension is difficult to generalize in other geometries, for example a 4-leg ladder with open boundaries or a width-6 cylinder. We find that a negative t' suppresses the conventional d-wave, leading to plaquette pairing. In contrast, a different t '' coupling acting diagonally on the plaquettes suppresses plaquette pairing, leading to conventional d-wave pairing.
KW - STRIPES
KW - STATE
U2 - 10.1103/PhysRevB.102.041106
DO - 10.1103/PhysRevB.102.041106
M3 - Journal article
VL - 102
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 4
M1 - 041106
ER -
ID: 271542670