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Precursor of pair-density wave in doping Kitaev spin liquid on the honeycomb lattice

机译:掺杂Kitaev旋转液体在蜂窝晶格中的配对密度波的前兆

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We study the effects of doping the Kitaev model on the honeycomb lattice where the spins interact via the bond-directional interaction JK, which is known to have a quantum spin liquid as its exact ground state. The effect of hole doping is studied within the t-JK model on a three-leg cylinder using density-matrix renormalization group. Upon light doping, we find that the ground state of the system has a dominant quasi-long-range charge-density-wave correlations but short-range single-particle correlations. In the pairing channel, the even-parity superconducting correlation is dominant with d-wave-like symmetry, which oscillates in sign as a function of separation with a period equal to that of the spin-density wave and two times the charge-density wave. Although these correlations fall rapidly (possibly exponentially) at long distances, this is never-the-less the example where a pair-density wave is the leading instability in the pairing channel on the honeycomb lattice.
机译:我们研究将Kitaev模型掺杂在蜂窝状晶格上的效果,其中旋转通过粘合方向相互作用JK相互作用,已知具有量子旋转液体作为其精确地位。 利用密度 - 基质重整化组在三腿圆柱体上的T-JK模型中研究了孔掺杂的影响。 在光掺杂时,我们发现系统的地位具有主导的准远射电荷密度波相关性,但是短程的单粒子相关性。 在配对通道中,偶数奇偶校验超导相关性与D波样对称主导,其以符号振荡,作为分离的函数,与旋转密度波的周期和电荷密度波的两倍相等。 。 虽然这些相关性在长距离迅速下降(可能是指数的),但这绝不是较少的,其中一对密度波是蜂窝状晶格上的配对通道中的领先不稳定性的示例。

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