Observation of nearly identical superconducting transition temperatures in the pressurized Weyl semimetals MIrTe4 (M=Nb and Ta)
- Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China); National High Magnetic Field Lab / Florida State University
- Chinese Academy of Sciences (CAS), Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China); Songshan Lake Materials Laboratory, Guangdong (China)
- Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China); Songshan Lake Materials Laboratory, Guangdong (China)
In this work, we report the observation of pressure-induced superconductivity in type-II Weyl semimetal (WSM) candidate NbIrTe4 and the evolution of its Hall coefficient (RH), magnetoresistance (MR), and lattice with increasing pressure to ~ 63 GPa. These results provide a significant opportunity to investigate the universal high-pressure behavior of ternary WSMs, including the sister compound TaIrTe4 that has been known through our previous studies. We find that the pressure-tuned evolution from the WSM to the superconducting (SC) state in these two compounds exhibit the same trend, i.e., a pressure-induced SC state emerges from the matrix of the non-superconducting WSM state at ~ 27 GPa, and then the WSM state and the SC state coexist up to 40 GPa. Above this pressure, an identical high-pressure behavior, characterized by almost the same value of RH and MR in its normal state and the same value of Tc in its SC state, appears in both compounds. Our results not only reveal the evolution from the WSM state to the SC state, but also demonstrate that NbIrTe4 and TaIrTe4 can make the same contribution to the normal and SC states that inhabit in the high-pressure phase, although these two compounds have dramatically different band structure at ambient pressure.
- Research Organization:
- Florida State Univ., Tallahassee, FL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences; National Key Research and Development Program of China; China Postdoctoral Science Foundation
- Grant/Contract Number:
- SC0002613
- OSTI ID:
- 1825523
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 14 Vol. 104; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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