Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5. / Guguchia, Z.; Mielke, C.; Das, D.; Gupta, R.; Yin, J. -X.; Liu, H.; Yin, Q.; Christensen, M. H.; Tu, Z.; Gong, C.; Shumiya, N.; Hossain, Md Shafayat; Gamsakhurdashvili, Ts; Elender, M.; Dai, Pengcheng; Amato, A.; Shi, Y.; Lei, H. C.; Fernandes, R. M.; Hasan, M. Z.; Luetkens, H.; Khasanov, R.

In: Nature Communications, Vol. 14, No. 1, 153, 11.01.2023.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Guguchia, Z, Mielke, C, Das, D, Gupta, R, Yin, J-X, Liu, H, Yin, Q, Christensen, MH, Tu, Z, Gong, C, Shumiya, N, Hossain, MS, Gamsakhurdashvili, T, Elender, M, Dai, P, Amato, A, Shi, Y, Lei, HC, Fernandes, RM, Hasan, MZ, Luetkens, H & Khasanov, R 2023, 'Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5', Nature Communications, vol. 14, no. 1, 153. https://doi.org/10.1038/s41467-022-35718-z

APA

Guguchia, Z., Mielke, C., Das, D., Gupta, R., Yin, J. -X., Liu, H., Yin, Q., Christensen, M. H., Tu, Z., Gong, C., Shumiya, N., Hossain, M. S., Gamsakhurdashvili, T., Elender, M., Dai, P., Amato, A., Shi, Y., Lei, H. C., Fernandes, R. M., ... Khasanov, R. (2023). Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5. Nature Communications, 14(1), [153]. https://doi.org/10.1038/s41467-022-35718-z

Vancouver

Guguchia Z, Mielke C, Das D, Gupta R, Yin J-X, Liu H et al. Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5. Nature Communications. 2023 Jan 11;14(1). 153. https://doi.org/10.1038/s41467-022-35718-z

Author

Guguchia, Z. ; Mielke, C. ; Das, D. ; Gupta, R. ; Yin, J. -X. ; Liu, H. ; Yin, Q. ; Christensen, M. H. ; Tu, Z. ; Gong, C. ; Shumiya, N. ; Hossain, Md Shafayat ; Gamsakhurdashvili, Ts ; Elender, M. ; Dai, Pengcheng ; Amato, A. ; Shi, Y. ; Lei, H. C. ; Fernandes, R. M. ; Hasan, M. Z. ; Luetkens, H. ; Khasanov, R. / Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5. In: Nature Communications. 2023 ; Vol. 14, No. 1.

Bibtex

@article{bb4fb6b74c25427d8ccf423a0dc73e95,
title = "Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5",
abstract = "Unconventional superconductors often feature competing orders, small superfluid density, and nodal electronic pairing. While unusual superconductivity has been proposed in the kagome metals AV(3)Sb(5), key spectroscopic evidence has remained elusive. Here we utilize pressure-tuned and ultra-low temperature muon spin spectroscopy to uncover the unconventional nature of superconductivity in RbV3Sb5 and KV3Sb5. At ambient pressure, we observed time-reversal symmetry breaking charge order below T-1*similar or equal to 110 K in RbV3Sb5 with an additional transition at T-2*similar or equal to 50 K. Remarkably, the superconducting state displays a nodal energy gap and a reduced superfluid density, which can be attributed to the competition with the charge order. Upon applying pressure, the charge-order transitions are suppressed, the superfluid density increases, and the superconducting state progressively evolves from nodal to nodeless. Once optimal superconductivity is achieved, we find a superconducting pairing state that is not only fully gapped, but also spontaneously breaks time-reversal symmetry. Our results point to unprecedented tunable nodal kagome superconductivity competing with time-reversal symmetry-breaking charge order and offer unique insights into the nature of the pairing state.",
keywords = "MAGNETIC PENETRATION DEPTH, MU-SR, DENSITY, MODEL",
author = "Z. Guguchia and C. Mielke and D. Das and R. Gupta and Yin, {J. -X.} and H. Liu and Q. Yin and Christensen, {M. H.} and Z. Tu and C. Gong and N. Shumiya and Hossain, {Md Shafayat} and Ts Gamsakhurdashvili and M. Elender and Pengcheng Dai and A. Amato and Y. Shi and Lei, {H. C.} and Fernandes, {R. M.} and Hasan, {M. Z.} and H. Luetkens and R. Khasanov",
year = "2023",
month = jan,
day = "11",
doi = "10.1038/s41467-022-35718-z",
language = "English",
volume = "14",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "nature publishing group",
number = "1",

}

RIS

TY - JOUR

T1 - Tunable unconventional kagome superconductivity in charge ordered RbV3Sb5 and KV3Sb5

AU - Guguchia, Z.

AU - Mielke, C.

AU - Das, D.

AU - Gupta, R.

AU - Yin, J. -X.

AU - Liu, H.

AU - Yin, Q.

AU - Christensen, M. H.

AU - Tu, Z.

AU - Gong, C.

AU - Shumiya, N.

AU - Hossain, Md Shafayat

AU - Gamsakhurdashvili, Ts

AU - Elender, M.

AU - Dai, Pengcheng

AU - Amato, A.

AU - Shi, Y.

AU - Lei, H. C.

AU - Fernandes, R. M.

AU - Hasan, M. Z.

AU - Luetkens, H.

AU - Khasanov, R.

PY - 2023/1/11

Y1 - 2023/1/11

N2 - Unconventional superconductors often feature competing orders, small superfluid density, and nodal electronic pairing. While unusual superconductivity has been proposed in the kagome metals AV(3)Sb(5), key spectroscopic evidence has remained elusive. Here we utilize pressure-tuned and ultra-low temperature muon spin spectroscopy to uncover the unconventional nature of superconductivity in RbV3Sb5 and KV3Sb5. At ambient pressure, we observed time-reversal symmetry breaking charge order below T-1*similar or equal to 110 K in RbV3Sb5 with an additional transition at T-2*similar or equal to 50 K. Remarkably, the superconducting state displays a nodal energy gap and a reduced superfluid density, which can be attributed to the competition with the charge order. Upon applying pressure, the charge-order transitions are suppressed, the superfluid density increases, and the superconducting state progressively evolves from nodal to nodeless. Once optimal superconductivity is achieved, we find a superconducting pairing state that is not only fully gapped, but also spontaneously breaks time-reversal symmetry. Our results point to unprecedented tunable nodal kagome superconductivity competing with time-reversal symmetry-breaking charge order and offer unique insights into the nature of the pairing state.

AB - Unconventional superconductors often feature competing orders, small superfluid density, and nodal electronic pairing. While unusual superconductivity has been proposed in the kagome metals AV(3)Sb(5), key spectroscopic evidence has remained elusive. Here we utilize pressure-tuned and ultra-low temperature muon spin spectroscopy to uncover the unconventional nature of superconductivity in RbV3Sb5 and KV3Sb5. At ambient pressure, we observed time-reversal symmetry breaking charge order below T-1*similar or equal to 110 K in RbV3Sb5 with an additional transition at T-2*similar or equal to 50 K. Remarkably, the superconducting state displays a nodal energy gap and a reduced superfluid density, which can be attributed to the competition with the charge order. Upon applying pressure, the charge-order transitions are suppressed, the superfluid density increases, and the superconducting state progressively evolves from nodal to nodeless. Once optimal superconductivity is achieved, we find a superconducting pairing state that is not only fully gapped, but also spontaneously breaks time-reversal symmetry. Our results point to unprecedented tunable nodal kagome superconductivity competing with time-reversal symmetry-breaking charge order and offer unique insights into the nature of the pairing state.

KW - MAGNETIC PENETRATION DEPTH

KW - MU-SR

KW - DENSITY

KW - MODEL

U2 - 10.1038/s41467-022-35718-z

DO - 10.1038/s41467-022-35718-z

M3 - Journal article

C2 - 36631467

VL - 14

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 153

ER -

ID: 347879755