Degenerate monolayer Ising superconductors via chiral-achiral molecule intercalation
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908724680982528 |
|---|---|
| author | Margineda, Daniel Álvarez-García, Covadonga Tezze, Daniel Gerivani, Sanaz Furqan, Mohammad Rivilla, Iván Casanova, Fèlix Arenal, Raul Artacho, Emilio Hueso, Luis E. Gobbi, Marco |
| author_facet | Margineda, Daniel Álvarez-García, Covadonga Tezze, Daniel Gerivani, Sanaz Furqan, Mohammad Rivilla, Iván Casanova, Fèlix Arenal, Raul Artacho, Emilio Hueso, Luis E. Gobbi, Marco |
| contents | Engineering unconventional superconductors is a central challenge in condensed matter physics. Molecule-intercalated TaS2 superlattices have recently been reported to host such states, yet their origin remains debated, underscoring the urgent need for controlled, device-integrated studies. Here, we report that nanometer-thick TaS2 and NbSe2 intercalated with chiral and achiral organic cations instead exhibit robust monolayer-like Ising superconductivity, with no evidence of unconventional pairing. Using high-quality superlattices integrated into devices, we disentangle the roles of interlayer coupling and charge transfer in shaping their superconducting behavior. In TaS2, intercalation induces interlayer decoupling regardless of molecular size or symmetry, yielding monolayer-like Ising superconductivity. NbSe2 instead retains quasi-three-dimensional transport, with a gradual Ising enhancement and near-monolayer behavior only at the largest interlayer spacing. Transport remains reciprocal across all superlattices, consistent with preserved inversion symmetry and incompatible with parity-breaking superconductivity and noncentrosymmetric monolayers. We attribute the behavior to electronically detached monolayers with opposite spin-split bands, coupled through thermal and tunneling processes, which overall preserve inversion symmetry. These findings establish molecular intercalation compounds as a robust, device-ready, platform for engineering advanced superconducting superlattices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_18051 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Degenerate monolayer Ising superconductors via chiral-achiral molecule intercalation Margineda, Daniel Álvarez-García, Covadonga Tezze, Daniel Gerivani, Sanaz Furqan, Mohammad Rivilla, Iván Casanova, Fèlix Arenal, Raul Artacho, Emilio Hueso, Luis E. Gobbi, Marco Superconductivity Engineering unconventional superconductors is a central challenge in condensed matter physics. Molecule-intercalated TaS2 superlattices have recently been reported to host such states, yet their origin remains debated, underscoring the urgent need for controlled, device-integrated studies. Here, we report that nanometer-thick TaS2 and NbSe2 intercalated with chiral and achiral organic cations instead exhibit robust monolayer-like Ising superconductivity, with no evidence of unconventional pairing. Using high-quality superlattices integrated into devices, we disentangle the roles of interlayer coupling and charge transfer in shaping their superconducting behavior. In TaS2, intercalation induces interlayer decoupling regardless of molecular size or symmetry, yielding monolayer-like Ising superconductivity. NbSe2 instead retains quasi-three-dimensional transport, with a gradual Ising enhancement and near-monolayer behavior only at the largest interlayer spacing. Transport remains reciprocal across all superlattices, consistent with preserved inversion symmetry and incompatible with parity-breaking superconductivity and noncentrosymmetric monolayers. We attribute the behavior to electronically detached monolayers with opposite spin-split bands, coupled through thermal and tunneling processes, which overall preserve inversion symmetry. These findings establish molecular intercalation compounds as a robust, device-ready, platform for engineering advanced superconducting superlattices. |
| title | Degenerate monolayer Ising superconductors via chiral-achiral molecule intercalation |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2512.18051 |