Revealing Fano resonance in the Dirac material ZrTe5 through Raman scattering

Di Cheng; Tao Jiang; Feng Zhang; Genda Gu; Liang Luo; Chuankun Huang; Boqun Song; Martin Mootz; Avinash Khatri; Joong Mok Park; Qiang Li; Yongxin Yao; Jigang Wang

doi:10.1103/zj2h-zt13

Revealing Fano resonance in the Dirac material ZrTe₅ through Raman scattering

Di Cheng
, Tao Jiang
, Feng Zhang
, Genda Gu
, Liang Luo
, Chuankun Huang
, Boqun Song
, Martin Mootz
, Avinash Khatri
, Joong Mok Park
, Qiang Li
, Yongxin Yao
, Jigang Wang

Ames Laboratory
Iowa State University
Brookhaven National Laboratory Condensed Matter Physics and Materials Science Department

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

3 Scopus citations

Abstract

We explore the Fano resonance in ZrTe₅, using terahertz Raman scattering measurements. We identified two closely spaced B_2g phonon modes, B_2g I and B_2g II, around 9 meV and 11 meV, respectively. Interestingly, only B_2g I exhibited the Fano resonance, an outcome of quantum interference between discrete phonon modes and continuous electronic excitations. This is consistent with the much stronger electron-phonon coupling of B_2g I mode demonstrated by first-principles calculations. Additionally, temperature-dependent measurements highlight an enhanced Fano asymmetry at elevated temperatures, contributed by the thermal renormalization of the band structure and electron-phonon coupling. This study offers insights into the complex interrelation of electron-phonon coupling, thermal effects, and Fano resonances in topological materials.

Original language	English
Article number	075108
Pages (from-to)	1-9
Number of pages	9
Journal	Physical Review B
Volume	112
Issue number	7
DOIs	https://doi.org/10.1103/zj2h-zt13
State	Published - Aug 4 2025

Access to Document

10.1103/zj2h-zt13

Cite this

@article{10f830bbe5c0414196eaeafcfeebcbc5,

title = "Revealing Fano resonance in the Dirac material ZrTe5 through Raman scattering",

abstract = "We explore the Fano resonance in ZrTe5, using terahertz Raman scattering measurements. We identified two closely spaced B2g phonon modes, B2g I and B2g II, around 9 meV and 11 meV, respectively. Interestingly, only B2g I exhibited the Fano resonance, an outcome of quantum interference between discrete phonon modes and continuous electronic excitations. This is consistent with the much stronger electron-phonon coupling of B2g I mode demonstrated by first-principles calculations. Additionally, temperature-dependent measurements highlight an enhanced Fano asymmetry at elevated temperatures, contributed by the thermal renormalization of the band structure and electron-phonon coupling. This study offers insights into the complex interrelation of electron-phonon coupling, thermal effects, and Fano resonances in topological materials.",

author = "Di Cheng and Tao Jiang and Feng Zhang and Genda Gu and Liang Luo and Chuankun Huang and Boqun Song and Martin Mootz and Avinash Khatri and Park, \{Joong Mok\} and Qiang Li and Yongxin Yao and Jigang Wang",

note = "Publisher Copyright: {\textcopyright}2025 American Physical Society",

year = "2025",

month = aug,

day = "4",

doi = "10.1103/zj2h-zt13",

language = "English",

volume = "112",

pages = "1--9",

journal = "Physical Review B",

issn = "2469-9950",

number = "7",

}

TY - JOUR

T1 - Revealing Fano resonance in the Dirac material ZrTe5 through Raman scattering

AU - Cheng, Di

AU - Jiang, Tao

AU - Zhang, Feng

AU - Gu, Genda

AU - Luo, Liang

AU - Huang, Chuankun

AU - Song, Boqun

AU - Mootz, Martin

AU - Khatri, Avinash

AU - Park, Joong Mok

AU - Li, Qiang

AU - Yao, Yongxin

AU - Wang, Jigang

PY - 2025/8/4

Y1 - 2025/8/4

N2 - We explore the Fano resonance in ZrTe5, using terahertz Raman scattering measurements. We identified two closely spaced B2g phonon modes, B2g I and B2g II, around 9 meV and 11 meV, respectively. Interestingly, only B2g I exhibited the Fano resonance, an outcome of quantum interference between discrete phonon modes and continuous electronic excitations. This is consistent with the much stronger electron-phonon coupling of B2g I mode demonstrated by first-principles calculations. Additionally, temperature-dependent measurements highlight an enhanced Fano asymmetry at elevated temperatures, contributed by the thermal renormalization of the band structure and electron-phonon coupling. This study offers insights into the complex interrelation of electron-phonon coupling, thermal effects, and Fano resonances in topological materials.

AB - We explore the Fano resonance in ZrTe5, using terahertz Raman scattering measurements. We identified two closely spaced B2g phonon modes, B2g I and B2g II, around 9 meV and 11 meV, respectively. Interestingly, only B2g I exhibited the Fano resonance, an outcome of quantum interference between discrete phonon modes and continuous electronic excitations. This is consistent with the much stronger electron-phonon coupling of B2g I mode demonstrated by first-principles calculations. Additionally, temperature-dependent measurements highlight an enhanced Fano asymmetry at elevated temperatures, contributed by the thermal renormalization of the band structure and electron-phonon coupling. This study offers insights into the complex interrelation of electron-phonon coupling, thermal effects, and Fano resonances in topological materials.

UR - https://www.scopus.com/pages/publications/105020940007

U2 - 10.1103/zj2h-zt13

DO - 10.1103/zj2h-zt13

M3 - Article

AN - SCOPUS:105020940007

SN - 2469-9950

VL - 112

SP - 1

EP - 9

JO - Physical Review B

JF - Physical Review B

IS - 7

M1 - 075108

ER -

Revealing Fano resonance in the Dirac material ZrTe₅ through Raman scattering

Abstract

Access to Document

Other files and links

Fingerprint

Cite this