Title: Electronic Raman scattering in the 2D antiferromagnet NiPS3

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [2]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [9]
  1. Boston Univ., MA (United States). Dept. of Chemistry
  2. Nanjing Univ. (China). Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering
  3. National High Magnetic Field Laboratory, Tallahassee, FL (United States); Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
  4. Boston Univ., MA (United States). Dept. of Materials Science and Engineering
  5. Boston College, Chestnut Hill, MA (United States). Dept. of Physics
  6. National High Magnetic Field Laboratory, Tallahassee, FL (United States)
  7. Boston Univ., MA (United States). Dept. of Chemistry; Boston Univ., MA (United States). Division of Materials Science and Engineering; Boston Univ., MA (United States). Dept. of Electrical and Computer Engineering, Boston Univ., MA (United States). Dept. of Physics
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
  9. Boston Univ., MA (United States). Dept. of Chemistry; Boston Univ., MA (United States). Division of Materials Science and Engineering; Boston Univ., MA (United States). The Photonics Center
+ Show Author Affiliations

Correlated-electron systems have long been an important platform for various interesting phenomena and fundamental questions in condensed matter physics. As a pivotal process in these systems, d-d transitions have been suggested as a key factor toward realizing optical spin control in two-dimensional (2D) magnets. However, it remains unclear how d-d excitations behave in quasi-2D systems with strong electronic correlation and spin-charge coupling. Here, we present a systematic electronic Raman spectroscopy investigation on d-d transitions in a 2D antiferromagnet—NiPS3, from bulk to atomically thin samples. Two electronic Raman modes originating from the scattering of incident photons with d electrons in Ni2+ ions are observed at ~1.0 eV. This electronic process persists down to trilayer flakes and exhibits insensitivity to the spin ordering of NiPS3. Our study demonstrates the utility of electronic Raman scattering in investigating the unique electronic structure and its coupling to magnetism in correlated 2D magnets.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
NSF; Office of Naval Research; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; FG02-07ER46451; SC0018080
OSTI ID:
1841496
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 2 Vol. 8; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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