Details

Autor(en) / Beteiligte

• Li, Haoxiang
• Fabbris, G.
• Said, A. H.
• Sun, J. P.
• Jiang, Yu-Xiao
• Yin, J.-X.
• Pai, Yun-Yi
• Yoon, Sangmoon
• Lupini, Andrew R.
• Nelson, C. S.
• Yin, Q. W.
• Gong, C. S.
• Tu, Z. J.
• Lei, H. C.
• Cheng, J.-G.
• Hasan, M. Z.
• Wang, Ziqiang
• Yan, Binghai
• Thomale, R.
• Lee, H. N.
• Miao, H.

Titel

Discovery of conjoined charge density waves in the kagome superconductor CsV3Sb5

Ist Teil von

• Nature communications, 2022-10, Vol.13 (1), p.6348-6348, Article 6348

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Abstract The electronic instabilities in CsV 3 Sb 5 are believed to originate from the V 3 d -electrons on the kagome plane, however the role of Sb 5 p -electrons for 3-dimensional orders is largely unexplored. Here, using resonant tender X-ray scattering and high-pressure X-ray scattering, we report a rare realization of conjoined charge density waves (CDWs) in CsV 3 Sb 5 , where a 2 × 2 × 1 CDW in the kagome sublattice and a Sb 5 p -electron assisted 2 × 2 × 2 CDW coexist. At ambient pressure, we discover a resonant enhancement on Sb L 1 -edge (2 s →5 p ) at the 2 × 2 × 2 CDW wavevectors. The resonance, however, is absent at the 2 × 2 × 1 CDW wavevectors. Applying hydrostatic pressure, CDW transition temperatures are separated, where the 2 × 2 × 2 CDW emerges 4 K above the 2 × 2 × 1 CDW at 1 GPa. These observations demonstrate that symmetry-breaking phases in CsV 3 Sb 5 go beyond the minimal framework of kagome electronic bands near van Hove filling.