Correlated Oxide Dirac Semimetal in the Extreme Quantum Limit
Abstrak
Quantum materials (QMs) with strong correlation and non-trivial topology are indispensable to next-generation information and computing technologies. Exploitation of topological band structure is an ideal starting point to realize correlated topological QMs. Herein, we report that strain-induced symmetry modification in correlated oxide SrNbO3 thin films creates an emerging topological band structure. Dirac electrons in strained SrNbO3 films reveal ultra-high mobility (100,000 cm2/Vs), exceptionally small effective mass (0.04me), and non-zero Berry phase. More importantly, strained SrNbO3 films reach the extreme quantum limit, exhibiting a sign of fractional occupation of Landau levels and giant mass enhancement. Our results suggest that symmetry-modified SrNbO3 is a rare example of a correlated topological QM, in which strong correlation of Dirac electrons leads to the realization of fractional occupation of Landau levels.
Topik & Kata Kunci
Penulis (20)
Jong Mok Ok
Narayan Mohanta
Jie Zhang
Sangmoon Yoon
Satoshi Okamoto
Eun Sang Choi
Hua Zhou
Megan Briggeman
Patrick Irvin
Andrew R. Lupini
Yun-Yi Pai
Elizabeth Skoropata
Changhee Sohn
Haoxiang Li
Hu Miao
Benjamin Lawrie
Woo Seok Choi
Gyula Eres
Jeremy Levy
Ho Nyung Lee
Akses Cepat
- Tahun Terbit
- 2021
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓