Spin-phonon coupling and two-magnons scattering behaviors in hexagonal NiAs-type antiferromagnetic MnTe epitaxial films

Jiyue Zhang; Qin Lian; Zhiqiang Pan; Wei Bai; Jing Yang; Yuanyuan Zhang; Xiaodong Tang; Junhao Chu

doi:10.1002/jrs.5928

Spin-phonon coupling and two-magnons scattering behaviors in hexagonal NiAs-type antiferromagnetic MnTe epitaxial films

Jiyue Zhang, Qin Lian, Zhiqiang Pan, Wei Bai, Jing Yang, Yuanyuan Zhang, Xiaodong Tang, Junhao Chu

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Temperature-dependent Raman scattering spectra of NiAs-type MnTe epitaxial films were measured to explore the temperature evolution of phonon modes and especially the spin-phonon coupling across Néel temperature (T_N). A significant deviation from an anharmonic mode below T_N strongly supports the existence of spin-phonon interaction, and its coupling strength is calculated to be approximately −0.16 cm⁻¹ from the E_2g phonon. Two-magnons (2M) scattering is found, which is proposed to closely relate to the nearest neighbor (NN) exchange interaction. These data elucidate the nature of the spin-phonon coupling in antiferromagnetic (AFM) MnTe and can avail to develop MnTe-based AFM spintronic devices.

Original language	English
Pages (from-to)	1383-1389
Number of pages	7
Journal	Journal of Raman Spectroscopy
Volume	51
Issue number	8
DOIs	https://doi.org/10.1002/jrs.5928
State	Published - 1 Aug 2020

Keywords

MnTe film
Raman spectroscopy
spin-phonon coupling
temperature dependence
two-magnons scattering

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10.1002/jrs.5928

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title = "Spin-phonon coupling and two-magnons scattering behaviors in hexagonal NiAs-type antiferromagnetic MnTe epitaxial films",

abstract = "Temperature-dependent Raman scattering spectra of NiAs-type MnTe epitaxial films were measured to explore the temperature evolution of phonon modes and especially the spin-phonon coupling across N{\'e}el temperature (TN). A significant deviation from an anharmonic mode below TN strongly supports the existence of spin-phonon interaction, and its coupling strength is calculated to be approximately −0.16 cm−1 from the E2g phonon. Two-magnons (2M) scattering is found, which is proposed to closely relate to the nearest neighbor (NN) exchange interaction. These data elucidate the nature of the spin-phonon coupling in antiferromagnetic (AFM) MnTe and can avail to develop MnTe-based AFM spintronic devices.",

keywords = "MnTe film, Raman spectroscopy, spin-phonon coupling, temperature dependence, two-magnons scattering",

author = "Jiyue Zhang and Qin Lian and Zhiqiang Pan and Wei Bai and Jing Yang and Yuanyuan Zhang and Xiaodong Tang and Junhao Chu",

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year = "2020",

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doi = "10.1002/jrs.5928",

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TY - JOUR

T1 - Spin-phonon coupling and two-magnons scattering behaviors in hexagonal NiAs-type antiferromagnetic MnTe epitaxial films

AU - Zhang, Jiyue

AU - Lian, Qin

AU - Pan, Zhiqiang

AU - Bai, Wei

AU - Yang, Jing

AU - Zhang, Yuanyuan

AU - Tang, Xiaodong

AU - Chu, Junhao

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Temperature-dependent Raman scattering spectra of NiAs-type MnTe epitaxial films were measured to explore the temperature evolution of phonon modes and especially the spin-phonon coupling across Néel temperature (TN). A significant deviation from an anharmonic mode below TN strongly supports the existence of spin-phonon interaction, and its coupling strength is calculated to be approximately −0.16 cm−1 from the E2g phonon. Two-magnons (2M) scattering is found, which is proposed to closely relate to the nearest neighbor (NN) exchange interaction. These data elucidate the nature of the spin-phonon coupling in antiferromagnetic (AFM) MnTe and can avail to develop MnTe-based AFM spintronic devices.

AB - Temperature-dependent Raman scattering spectra of NiAs-type MnTe epitaxial films were measured to explore the temperature evolution of phonon modes and especially the spin-phonon coupling across Néel temperature (TN). A significant deviation from an anharmonic mode below TN strongly supports the existence of spin-phonon interaction, and its coupling strength is calculated to be approximately −0.16 cm−1 from the E2g phonon. Two-magnons (2M) scattering is found, which is proposed to closely relate to the nearest neighbor (NN) exchange interaction. These data elucidate the nature of the spin-phonon coupling in antiferromagnetic (AFM) MnTe and can avail to develop MnTe-based AFM spintronic devices.

KW - MnTe film

KW - Raman spectroscopy

KW - spin-phonon coupling

KW - temperature dependence

KW - two-magnons scattering

UR - https://www.scopus.com/pages/publications/85087436399

U2 - 10.1002/jrs.5928

DO - 10.1002/jrs.5928

M3 - 文章

AN - SCOPUS:85087436399

SN - 0377-0486

VL - 51

SP - 1383

EP - 1389

JO - Journal of Raman Spectroscopy

JF - Journal of Raman Spectroscopy

IS - 8

ER -

Spin-phonon coupling and two-magnons scattering behaviors in hexagonal NiAs-type antiferromagnetic MnTe epitaxial films

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