Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.26203 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917445247172608 |
|---|---|
| author | Wang, Yuejian Wu, Zhongyan Bhupendra, K C Zhang, Dongzhou Wang, Lin Khare, Sanjay V. Prodan, Lilian Tsurkan, Vladimir |
| author_facet | Wang, Yuejian Wu, Zhongyan Bhupendra, K C Zhang, Dongzhou Wang, Lin Khare, Sanjay V. Prodan, Lilian Tsurkan, Vladimir |
| contents | Understanding how electronic transport evolves from localized to itinerant regimes in correlated cluster solids remains an important challenge in condensed-matter physics. Here we investigate the pressure-dependent transport properties of the lacunar spinel GaNb4Se8, a cluster Mott insulator at ambient conditions. At low pressures, the resistivity follows Efros-Shklovskii variable-range hopping, indicating Coulomb-gap-controlled carrier localization (x ~ 6.1 Angstrom). A crossover toward metallic transport begins near ~ 5 GPa, whereas a crystallographic transition from the cubic phase to a monoclinic C2 phase occurs at significantly higher pressure (~ 20 GPa), establishing a hierarchy characterized by the decoupling of electronic delocalization from structural symmetry change. At higher pressures, superconductivity (xi(0) ~ 80-90 Angstrom) emerges from the correlated metallic regime. These results identify GaNb4Se8 as a platform for studying correlation-controlled transport evolution in cluster-based solids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_26203 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | From Wavefunction Collapse to Superconductivity: Evolution of the Electronic State in Compressed GaNb4Se8 Wang, Yuejian Wu, Zhongyan Bhupendra, K C Zhang, Dongzhou Wang, Lin Khare, Sanjay V. Prodan, Lilian Tsurkan, Vladimir Superconductivity Understanding how electronic transport evolves from localized to itinerant regimes in correlated cluster solids remains an important challenge in condensed-matter physics. Here we investigate the pressure-dependent transport properties of the lacunar spinel GaNb4Se8, a cluster Mott insulator at ambient conditions. At low pressures, the resistivity follows Efros-Shklovskii variable-range hopping, indicating Coulomb-gap-controlled carrier localization (x ~ 6.1 Angstrom). A crossover toward metallic transport begins near ~ 5 GPa, whereas a crystallographic transition from the cubic phase to a monoclinic C2 phase occurs at significantly higher pressure (~ 20 GPa), establishing a hierarchy characterized by the decoupling of electronic delocalization from structural symmetry change. At higher pressures, superconductivity (xi(0) ~ 80-90 Angstrom) emerges from the correlated metallic regime. These results identify GaNb4Se8 as a platform for studying correlation-controlled transport evolution in cluster-based solids. |
| title | From Wavefunction Collapse to Superconductivity: Evolution of the Electronic State in Compressed GaNb4Se8 |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2604.26203 |