Fragility of Fermi arcs in Dirac semimetals
Abstract
We use tunable, vacuum ultraviolet laser based angle-resolved photoemission spectroscopy and density functional theory (DFT) calculations to study the electronic properties of Dirac semimetal candidate cubic PtBi2 . In addition to bulk electronic states we also find surface states in PtBi2, which is expected as PtBi2 was theoretically predicated to be a candidate Dirac semimetal. The surface states are also well reproduced from DFT band calculations. Impressively, the topological surface states form Fermi contours rather than double Fermi arcs that were observed in Na3Bi. The surface bands forming the Fermi contours merge with bulk bands in proximity to the Dirac point projections, as expected. Our data validate the existence of Dirac states in PtBi2 and reveal the fragility of the Fermi arcs in Dirac semimetals. Because the Fermi arcs are not topologically protected in general, they can be deformed into Fermi contours, as proposed by M. Kargarian et al. [Proc. Natl. Acad. Sci. USA 113, 8648 (2016)]. Our results demonstrate the validity of this theory in PtBi2 .
- Authors:
-
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
- Ames Lab., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1514886
- Alternate Identifier(s):
- OSTI ID: 1507457
- Report Number(s):
- IS-J-9936
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- AC02-07CH11358; GBMF4411; DMR-1420451
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 16; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Wu, Yun, Jo, Na Hyun, Wang, Lin-Lin, Schmidt, Connor A., Neilson, Kathryn M., Schrunk, Benjamin, Swatek, Przemyslaw, Eaton, Andrew, Bud'ko, S. L., Canfield, P. C., and Kaminski, Adam. Fragility of Fermi arcs in Dirac semimetals. United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.99.161113.
Wu, Yun, Jo, Na Hyun, Wang, Lin-Lin, Schmidt, Connor A., Neilson, Kathryn M., Schrunk, Benjamin, Swatek, Przemyslaw, Eaton, Andrew, Bud'ko, S. L., Canfield, P. C., & Kaminski, Adam. Fragility of Fermi arcs in Dirac semimetals. United States. https://doi.org/10.1103/PhysRevB.99.161113
Wu, Yun, Jo, Na Hyun, Wang, Lin-Lin, Schmidt, Connor A., Neilson, Kathryn M., Schrunk, Benjamin, Swatek, Przemyslaw, Eaton, Andrew, Bud'ko, S. L., Canfield, P. C., and Kaminski, Adam. Wed .
"Fragility of Fermi arcs in Dirac semimetals". United States. https://doi.org/10.1103/PhysRevB.99.161113. https://www.osti.gov/servlets/purl/1514886.
@article{osti_1514886,
title = {Fragility of Fermi arcs in Dirac semimetals},
author = {Wu, Yun and Jo, Na Hyun and Wang, Lin-Lin and Schmidt, Connor A. and Neilson, Kathryn M. and Schrunk, Benjamin and Swatek, Przemyslaw and Eaton, Andrew and Bud'ko, S. L. and Canfield, P. C. and Kaminski, Adam},
abstractNote = {We use tunable, vacuum ultraviolet laser based angle-resolved photoemission spectroscopy and density functional theory (DFT) calculations to study the electronic properties of Dirac semimetal candidate cubic PtBi2 . In addition to bulk electronic states we also find surface states in PtBi2, which is expected as PtBi2 was theoretically predicated to be a candidate Dirac semimetal. The surface states are also well reproduced from DFT band calculations. Impressively, the topological surface states form Fermi contours rather than double Fermi arcs that were observed in Na3Bi. The surface bands forming the Fermi contours merge with bulk bands in proximity to the Dirac point projections, as expected. Our data validate the existence of Dirac states in PtBi2 and reveal the fragility of the Fermi arcs in Dirac semimetals. Because the Fermi arcs are not topologically protected in general, they can be deformed into Fermi contours, as proposed by M. Kargarian et al. [Proc. Natl. Acad. Sci. USA 113, 8648 (2016)]. Our results demonstrate the validity of this theory in PtBi2 .},
doi = {10.1103/PhysRevB.99.161113},
journal = {Physical Review B},
number = 16,
volume = 99,
place = {United States},
year = {Wed Apr 17 00:00:00 EDT 2019},
month = {Wed Apr 17 00:00:00 EDT 2019}
}
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