Observation of Dirac-like semi-metallic phase in NdSb

Neupane, Madhab; Mofazzel Hosen, M.; Belopolski, Ilya; Wakeham, Nicholas; Dimitri, Klauss; Dhakal, Nagendra; Zhu, Jian-Xin; Zahid Hasan, M.; Bauer, Eric D.; Ronning, Filip

doi:10.1088/0953-8984/28/23/23LT02

Title: Observation of Dirac-like semi-metallic phase in NdSb

Journal Article · Mon May 09 00:00:00 EDT 2016 · Journal of Physics. Condensed Matter

DOI:https://doi.org/10.1088/0953-8984/28/23/23LT02· OSTI ID:1441303

Neupane, Madhab ^[1]; Mofazzel Hosen, M. ^[1]; Belopolski, Ilya ^[2]; Wakeham, Nicholas ^[3]; Dimitri, Klauss ^[1]; Dhakal, Nagendra ^[1]; Zhu, Jian-Xin ^[3]; Zahid Hasan, M. ^[2]; Bauer, Eric D. ^[3]; Ronning, Filip ^[3]

Univ. of Central Florida, Orlando, FL (United States). Dept. of Physics
Princeton Univ., NJ (United States). Joseph Henry Lab. Dept. of Physics
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The search of new topological phases of matter is one of the new directions in condensed matter physics. Recent experimental realizations of Dirac semimetal phases pave the way to look for other exotic phases of matter in real materials. In this paper, we present a systematic angle-resolved photoemission spectroscopy (ARPES) study of NdSb, a potential candidate for hosting a Dirac semi-metal phase. Our studies reveal two hole-like Fermi surface pockets present at the zone center ($$\Gamma$$ ) point as well as two elliptical electron-pockets present in the zone corner (X) point of the Brillouin zone (BZ). Interestingly, Dirac-like linearly dispersive states are observed about the zone corner (X) point in NdSb. Our first-principles calculations agree with the experimentally observed bands at the $$\Gamma$$ point. Moreover, the Dirac-like state observed in NdSb may be a novel correlated state, not yet predicted in calculations. Finally, our study opens a new direction to look for Dirac semi-metal states in other members of the rare earth monopnictide family.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Princeton Univ., NJ (United States); Univ. of Central Florida, Orlando, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC); LANL Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); Gordon and Betty Moore Foundation (United States)

Grant/Contract Number:: AC52-06NA25396; NSF-DMR-1507585; NSF-DMR-1006492; GBMF4547

OSTI ID:: 1441303

Report Number(s):: LA-UR-17-22718; TRN: US1900887

Journal Information:: Journal of Physics. Condensed Matter, Vol. 28, Issue 23; ISSN 0953-8984

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 37 works

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