Pressure-induced phase transitions and superconductivity in a black phosphorus single crystal
Abstract
A high-pressure study of a black phosphorus crystal establishes a rich phase diagram, including Weyl semimetal and superconducting states, Lifshitz-type semiconductor–semimetal transitions, and two structural phase transitions. Transport properties and quantum oscillations under high pressure provide critically valuable information to understand the physics of these new phases. The pressure dependence of physical properties has been reliably measured under hydrostatic pressure and applied magnetic fields using a large-volume apparatus. Superconductivity in the A7 phase has been found to exhibit the largest magnetoresistance effect observed in its normal state so far. The Bardeen–Cooper–Schrieffer superconductivity in the A7 phase identified by the experiment can be accounted for by the phonon mechanism based on a first-principles calculation.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 14, 2018
- Source ID
- 10.1073/pnas.1810726115
Entities
People
- Allan H. MacDonald
- Jianping Sun
- Jianshi Zhou
- Jinguang Cheng
- John B. Goodenough
- Miao Gao
- Prashant Shahi
- Tao Xiang
- Xiang Li
- Yoshiya Uwatoko
Organizations
- Institute of Physics
- National Natural Science Foundation of China
- National Science Foundation
- Ningbo University
- Program 973
- United States Army
- University of Chinese Academy of Sciences
- University of Texas at Austin
- University of Tokyo