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Raman and neutron evidence for unusual magnetic excitations in α-RuCl3

Sandilands and colleagues measured a broad Raman continuum and anomalous phonon line shapes in α-RuCl3. In a separate neutron study, Banerjee and colleagues reported magnetic ordering and an excitation spectrum whose broad component persisted above the ordering temperature. Both teams compared their observations with predictions for proximity to a Kitaev spin-liquid regime.

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What is recorded here?

Sandilands and colleagues measured a broad Raman continuum and anomalous phonon line shapes in α-RuCl3. In a separate neutron study, Banerjee and colleagues reported magnetic ordering and an excitation spectrum whose broad component persisted above the ordering temperature. Both teams compared their observations with predictions for proximity to a Kitaev spin-liquid regime.

Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.

Scientific scope

The Raman continuum and neutron spectra are observations; attribution to fractionalized Majorana excitations and proximity to a spin liquid is an interpretation based on models, not a unique identification. Both papers identify magnetic order at low temperatures and consider limitations of simple spin-wave descriptions. Raman alternatives include damped two-magnon scattering and stacking disorder; neutron spectra are powder averaged and competing Hamiltonians, resolution and sample structure remain relevant. The neutron preprint refers to separate supplementary material. Its individual contributor list shown here is incomplete. The Raman supplement contains a Fano formula requiring literal and fit-code reconciliation. The independent 2018 thermal-Hall HOLD is not resolved by these earlier measurements.

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People and systems

Luke J. Sandilands; Yao Tian; Kemp W. Plumb; Young-June Kim; Kenneth S. Burch; A. Banerjee; C. A. Bridges; J-Q. Yan

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English catalogue narrative

Raman and neutron evidence for unusual magnetic excitations in α-RuCl3

Sandilands and colleagues measured a broad Raman continuum and anomalous phonon line shapes in α-RuCl3. In a separate neutron study, Banerjee and colleagues reported magnetic ordering and an excitation spectrum whose broad component persisted above the ordering temperature. Both teams compared their observations with predictions for proximity to a Kitaev spin-liquid regime.

Scientific scope

The Raman continuum and neutron spectra are observations; attribution to fractionalized Majorana excitations and proximity to a spin liquid is an interpretation based on models, not a unique identification. Both papers identify magnetic order at low temperatures and consider limitations of simple spin-wave descriptions. Raman alternatives include damped two-magnon scattering and stacking disorder; neutron spectra are powder averaged and competing Hamiltonians, resolution and sample structure remain relevant. The neutron preprint refers to separate supplementary material. Its individual contributor list shown here is incomplete. The Raman supplement contains a Fano formula requiring literal and fit-code reconciliation. The independent 2018 thermal-Hall HOLD is not resolved by these earlier measurements.

Reading status

This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.

People and systems

Luke J. Sandilands; Yao Tian; Kemp W. Plumb; Young-June Kim; Kenneth S. Burch; A. Banerjee; C. A. Bridges; J-Q. Yan

These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.

Original sources