Unique Quantum Metallic State in Ti<sub>2</sub>O<sub>3</sub>/GaN
The emergence of quantum metallic state marked by a saturating finite electrical resistance in the zero-temperature limit in a variety of 2D superconductors injects an exciting momentum into the realm of heterostructure superconductivity. Despite much research effort over the last few decades, there is not yet a general consensus on the nature of this unexpected quantum metal. Here, we report the observation of a unique quantum metallic state within the hallmark of Bose-metal in Ti2O3/GaN. Remarkably, the quantum bosonic metallic state continuously tuned by a magnetic field in the vicinity of the two-dimensional superconductivity-metal transition persists in the normal phase, indicating the existence of composite bosons formed by electron Cooper pairs even in the normal phase. Our findings provide distinct evidence for electron pairing in the normal phase of heterointerface superconductors and shed fresh light on the pairing nature underlying heterointerface superconductivity.
Authors
- Yueshen Wu (ORCID: https://orcid.org/0000-0002-3784-0594)
- Gang Mu (ORCID: https://orcid.org/0000-0001-5676-4702)
- Zhongfeng Ning (ORCID: https://orcid.org/0009-0004-3683-9163)
- Huanyi Xue
- Wei Li (ORCID: https://orcid.org/0000-0002-4708-5764)
- Zhenghua An (ORCID: https://orcid.org/0000-0001-8664-6184)
- Jie Shen (ORCID: https://orcid.org/0000-0002-7205-5081)
- Guanqun Zhang
- Jun Li (ORCID: https://orcid.org/0000-0002-6928-1256)
- Yan Chen (ORCID: https://orcid.org/0000-0003-1723-0112)
- Yixin Liu
- Lijie Wang (ORCID: https://orcid.org/0000-0002-1786-5962)
- Jinghui Wang (ORCID: https://orcid.org/0000-0003-2661-7239)
- Chunlei Gao (ORCID: https://orcid.org/0009-0000-8656-7718)
- Guoan Li
Institutions
- Chinese Academy of Sciences (CN)
- Fudan University (CN)
- ShanghaiTech University (CN)
- Quantum Devices (United States) (US)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Science and Technology on Surface Physics and Chemistry Laboratory (CN)
- Shanghai Institute of Microsystem and Information Technology (CN)
- Institute of Physics (CN)
- University of Chinese Academy of Sciences (CN)
- State Key Laboratory of Surface Physics
Publication Details
- Journal
- ACS Applied Electronic Materials
- Published
- 2024-10-19
- DOI
- https://doi.org/10.1021/acsaelm.4c01291
- Citations
- 1
- Primary Topic
- Electronic and Structural Properties of Oxides
- Type
- article
- Field-Weighted Citation Impact
- 0.12
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Science and Technology Commission of Shanghai Municipality
- Beijing Nova Program