Magnetic field-induced pair density wave state in the cuprate vortex halo
Magnetic field-induced pair density wave state in the cuprate vortex halo
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DOI：
10.1126/science.aat1773
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发表时间：
2019-06-07
期刊：
影响因子：
56.9
通讯作者：
Hamidian, M. H.
中科院分区：
文献类型：
--
作者：
Edkins, S. D.;Kostin, A.;Hamidian, M. H.
高磁场抑制铜的超导性，揭示了不寻常的密度波（DW）状态与无法解释的量子振荡共存。虽然通常被标记为电荷密度波（CDW），但这种DW状态实际上可能是电子对密度波（PDW）。为了寻找场致PDW的证据，我们可视化了Bi2Sr2CaCu2O8涡旋核心周围光晕内电子态N(r)密度的调制。我们发现了许多场致PDW预测的现象，包括两组具有波矢量Q(P)和2Q(P)的粒子-空穴对称N(r)调制，后者从核心衰减的速度是前者的两倍。这些数据表明，欠掺杂超导铜酸盐的初级场致态是PDW，具有大约8个CuO2单位胞周期，并与次级cdw共存。
High magnetic fields suppress cuprate superconductivity to reveal an unusual density wave (DW) state coexisting with unexplained quantum oscillations. Although routinely labeled a charge density wave (CDW), this DW state could actually be an electron-pair density wave (PDW). To search for evidence of a field-induced PDW, we visualized modulations in the density of electronic states N(r) within the halo surrounding Bi2Sr2CaCu2O8 vortex cores. We detected numerous phenomena predicted for a field-induced PDW, including two sets of particle-hole symmetric N(r) modulations with wave vectors Q(P) and 2Q(P), with the latter decaying twice as rapidly from the core as the former. These data imply that the primary field-induced state in underdoped superconducting cuprates is a PDW, with approximately eight CuO2 unit-cell periodicity and coexisting with its secondary CDWs.