Evolution of charge correlations in the hole-doped kagome superconductor CsV3−𝑥⁢Ti𝑥⁢Sb5

Pokharel, Ganesh; Zhang, Canxun; Redekop, Evgeny; Ortiz, Brenden R.; Salinas, Andrea N. Capa; Schwarz, Sarah; Alvarado, Steven J. Gomez; Sarker, Suchismita; Young, Andrea F.; Wilson, Stephen D.

doi:10.1103/gv69-1lyj

Title: Evolution of charge correlations in the hole-doped kagome superconductor CsV_3−𝑥⁢Ti_𝑥⁢Sb₅

Journal Article · Tue Sep 16 00:00:00 UTC 2025 · Physical Review Materials

DOI: https://doi.org/10.1103/gv69-1lyj · OSTI ID:3005529

^[1]; Zhang, Canxun ^[2];

^[2]; Ortiz, Brenden R. ^[2];

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^[3];

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University of California, Santa Barbara, CA (United States); University of West Georgia, Carrollton, GA (United States)
University of California, Santa Barbara, CA (United States)
Cornell University, Ithaca, NY (United States)

The interplay between superconductivity and charge correlations in the kagome metal CsV_3⁢Sb₅ can be tuned by external perturbations such as doping or pressure. Here we present a study of charge correlations and superconductivity upon hole doping via Ti substitution on the V kagome sites in CsV_3−𝑥⁢Ti_𝑥⁢Sb₅ via synchrotron x-ray diffraction and scanning superconducting quantum interference device measurements. While the superconducting phase, as viewed via the vortex structure, remains conventional and unchanged across the phase diagram, the nature of charge correlations evolves as a function of hole doping from the first superconducting dome into the second superconducting dome. For Ti doping in the first superconducting dome, competing 2×2×2 and 2×2×4 supercells form within the charge density wave state and are suppressed rapidly with carrier substitution. In the second superconducting dome, no charge correlations are detected. Here, comparing these results to those observed for CsV₃⁢Sb_5−𝑥⁢Sn_𝑥 suggests important differences between hole doping via chemical substitution on the V and Sb sites, particularly in the disorder potential associated with each dopant.

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Research Organization:: University of California, Santa Barbara, CA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: SC0020305

OSTI ID:: 3005529

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 9 Vol. 9; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Evolution of charge correlations in the hole-doped kagome superconductor CsV3−𝑥⁢Ti𝑥⁢Sb5

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Title: Evolution of charge correlations in the hole-doped kagome superconductor CsV_3−𝑥⁢Ti_𝑥⁢Sb₅