Title: Angular‐Momentum Transfer Mediated by a Vibronic‐Bound‐State

Journal Article · · Advanced Science
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  1. Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA, Materials Department University of California Santa Barbara Santa Barbara CA 93106 USA
  2. Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
  3. Materials Department University of California Santa Barbara Santa Barbara CA 93106 USA
  4. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA

Abstract The notion that phonons can carry pseudo‐angular momentum has many major consequences, including topologically protected phonon chirality, Berry curvature of phonon band structure, and the phonon Hall effect. When a phonon is resonantly coupled to an orbital state split by its crystal field environment, a so‐called vibronic bound state forms. Here, a vibronic bound state is observed in NaYbSe 2 , a quantum spin liquid candidate. In addition, field and polarization dependent Raman microscopy is used to probe an angular momentum transfer of Δ J z = ±ℏ between phonons and the crystalline electric field mediated by the vibronic bound stat. This angular momentum transfer between electronic and lattice subsystems provides new pathways for selective optical addressability of phononic angular momentum via electronic ancillary states.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC05-00OR22725; SC0017752
OSTI ID:
2205391
Journal Information:
Advanced Science, Journal Name: Advanced Science Journal Issue: 2 Vol. 11; ISSN 2198-3844
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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