Charge density waves in the 2.5-dimensional quantum heterostructure

Yang, F. Z.; Zhang, T. T.; Meng, F. Y.; Lei, H. C.; Nelson, C.; Cai, Y. Q.; Vescovo, E.; Said, A. H.; Lozano, P. M.; Fabbris, G.; Miao, H.

doi:10.1103/physrevb.111.l041101

Title: Charge density waves in the 2.5-dimensional quantum heterostructure

Journal Article · 02 January 2025 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.111.l041101 · OSTI ID:2498453

^[1]; Zhang, T. T. ^[2]; Meng, F. Y. ^[3]; Lei, H. C. ^[3];

^[4];

^[4]; Vescovo, E. ^[4]; Said, A. H. ^[5];

^[5];

^[1]

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Chinese Academy of Sciences (CAS), Beijing (China)
Renmin Univ. of China, Beijing (China)
Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Charge density wave (CDW) and their interplay with correlated and topological quantum states are at the forefront of condensed matter research. The 4H_b-TaS₂ is a CDW ordered quantum heterostructure that is formed by alternative stacking of Mott insulating 1T-TaS₂ and Ising superconducting 1H-TaS₂. While the $$\sqrt{13}$$ ×$$\sqrt{13}$$ and 3 × 3 CDWs have been respectively observed in the bulk 1T-TaS₂ and 2H-TaS₂, the CDWs and their pivotal role for unconventional superconductivity in the 4⁢Hb-TaS₂ remain unsolved. In this Letter, we reveal the two-dimensional (2D) $$\sqrt{13}$$ ×$$\sqrt{13}$$ chiral CDW in the 1T layers and intraunit cell coupled 2D 2 × 2 CDW in the 1H and 1H' layers of 4⁢H_b-TaS₂. Here, our results establish 4⁢H_b-TaS₂ a 2.5D quantum heterostructure, where 2D quantum states emerge from 3D crystalline structure.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-06CH11357; AC05-00OR22725; SC0012704

OSTI ID:: 2498453

Report Number(s):: BNL--228327-2025-JAAM

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 4 Vol. 111; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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