Diagonal nematicity in the pseudogap phase of HgBa2CuO4+δ

H. Murayama, Y. Sato, R. Kurihara, S. Kasahara, Y. Mizukami, Y. Kasahara, H. Uchiyama, A. Yamamoto, E. G. Moon, J. Cai, J. Freyermuth, M. Greven, T. Shibauchi, Y. Matsuda

研究成果: Article

6 引用 (Scopus)


The pseudogap phenomenon in the cuprates is arguably the most mysterious puzzle in the field of high-temperature superconductivity. The tetragonal cuprate HgBa2CuO4+δ, with only one CuO2 layer per primitive cell, is an ideal system to tackle this puzzle. Here, we measure the magnetic susceptibility anisotropy within the CuO2 plane with exceptionally high-precision magnetic torque experiments. Our key finding is that a distinct two-fold in-plane anisotropy sets in below the pseudogap temperature T*, which provides thermodynamic evidence for a nematic phase transition with broken four-fold symmetry. Surprisingly, the nematic director orients along the diagonal direction of the CuO2 square lattice, in sharp contrast to the bond nematicity along the Cu-O-Cu direction. Another remarkable feature is that the enhancement of the diagonal nematicity with decreasing temperature is suppressed around the temperature at which short-range charge-density-wave formation occurs. Our result suggests a competing relationship between diagonal nematic and charge-density-wave order in HgBa2CuO4+δ.

ジャーナルNature Communications
出版物ステータスPublished - 2019 12 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

フィンガープリント Diagonal nematicity in the pseudogap phase of HgBa<sub>2</sub>CuO<sub>4+δ</sub>' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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    Murayama, H., Sato, Y., Kurihara, R., Kasahara, S., Mizukami, Y., Kasahara, Y., Uchiyama, H., Yamamoto, A., Moon, E. G., Cai, J., Freyermuth, J., Greven, M., Shibauchi, T., & Matsuda, Y. (2019). Diagonal nematicity in the pseudogap phase of HgBa2CuO4+δ Nature Communications, 10(1), [3282]. https://doi.org/10.1038/s41467-019-11200-1