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Discerning electronic fingerprints of nodal and antinodal nestings and their phase coherences in doped cuprate superconductors

机译：掺杂铜酸盐超导体中节点和反节点嵌套的电子指纹及其相位相干性

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摘要

The complexity of competing orders in cuprates has recently been multiplied by a number of bulk evidences of charge ordering with wave vector that connects the antinodal region of the Fermi surface. This result contradicts many spectroscopic results of the nodal nesting. To resolve this issue, we carry out a unified study of the resulting electronic fingerprints of both nodal and antinodal nestings (NNs/ANs) and compare with angle-resolved photoemission, scanning tunneling spectroscopic data, as well as bulk-sensitive Hall-effect measurements. Our result makes several definitive distinctions between them in that while both nestings gap out the antinodal region, AN induces an additional quasiparticle gap below the Fermi level along the nodal direction, which is so far uncharted in spectroscopic data. Furthermore, we show that the Hall coefficient in the AN state obtains a discontinuous jump at the phase transition from an electronlike nodal pocket (negative value) to a large holelike Fermi surface (positive value), in contrast to a continuous transition in the available data. We conclude that individual NNs and ANs have difficulties in explaining all of the data. In this spirit, we study a possibility of coexisting NN and AN phases within a Ginsburg-Landau functional formalism. An interesting possibility of disorder pinned "chiral" charge ordering is finally discussed.
机译：近来，铜价竞争性订单的复杂性被大量的电荷定序和波矢所连接，这些波矢连接了费米表面的反节点区域。该结果与节点嵌套的许多光谱结果相矛盾。为解决此问题，我们对结点和反结点嵌套（NNs / ANs）产生的电子指纹进行了统一研究，并与角度分辨光发射，扫描隧道光谱数据以及体敏霍尔效应测量进行了比较。我们的结果在它们之间进行了几个明确的区分，尽管两个嵌套都在反结点区域之外，而AN沿结点方向在费米能级以下又引起了一个额外的准粒子间隙，这在光谱数据中尚属未知。此外，我们发现，与可用数据中的连续跃迁相反，在AN状态下的霍尔系数在从电子状结腔（负值）到大孔状费米表面（正值）的相变处获得不连续跃迁。我们得出的结论是，单个的NN和AN难以解释所有数据。本着这种精神，我们研究了在Ginsburg-Landau功能形式主义中NN和AN阶段共存的可能性。最后讨论了无序固定的“手性”电荷排序的一种有趣的可能性。

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  • 来源
    《Physical review》 |2013年第14期|144505.1-144505.6|共6页
  • 作者

    Tanmoy Das;

  • 作者单位

    Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    electronic structure;

    机译：电子结构;

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