Optical evidence of the chiral magnetic anomaly in the Weyl semimetal TaAs
Chiral pumping from optical electric fields oscillating at terahertz frequencies is observed in the Weyl material TaAs with electric and magnetic fields aligned along both the a and c axes. Free-carrier spectral weight enhancement is measured directly, confirming theoretical expectations of chiral p...
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| Veröffentlicht in: | Physical review. B 2020-01, Vol.101 (12), p.1, Article 125102 |
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| container_title | Physical review. B |
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| creator | Levy, A. L. Sushkov, A. B. Liu, Fengguang Shen, Bing Ni, Ni Drew, H. D. Jenkins, G. S. |
| description | Chiral pumping from optical electric fields oscillating at terahertz frequencies is observed in the Weyl material TaAs with electric and magnetic fields aligned along both the a and c axes. Free-carrier spectral weight enhancement is measured directly, confirming theoretical expectations of chiral pumping. A departure from linear field dependence of the Drude weight is observed at the highest fields in the quantum limit, providing evidence of field-dependent Fermi velocity of the chiral Landau level. Implications for the chiral magnetic effect in Weyl semimetals from the optical f-sum rule are discussed. |
| doi_str_mv | 10.1103/PhysRevB.101.125102 |
| format | Article |
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L. ; Sushkov, A. B. ; Liu, Fengguang ; Shen, Bing ; Ni, Ni ; Drew, H. D. ; Jenkins, G. S.</creator><creatorcontrib>Levy, A. L. ; Sushkov, A. B. ; Liu, Fengguang ; Shen, Bing ; Ni, Ni ; Drew, H. D. ; Jenkins, G. S.</creatorcontrib><description>Chiral pumping from optical electric fields oscillating at terahertz frequencies is observed in the Weyl material TaAs with electric and magnetic fields aligned along both the a and c axes. Free-carrier spectral weight enhancement is measured directly, confirming theoretical expectations of chiral pumping. A departure from linear field dependence of the Drude weight is observed at the highest fields in the quantum limit, providing evidence of field-dependent Fermi velocity of the chiral Landau level. Implications for the chiral magnetic effect in Weyl semimetals from the optical f-sum rule are discussed.</description><identifier>ISSN: 2469-9950</identifier><identifier>EISSN: 2469-9969</identifier><identifier>DOI: 10.1103/PhysRevB.101.125102</identifier><identifier>PMID: 38504773</identifier><language>eng</language><publisher>COLLEGE PK: Amer Physical Soc</publisher><subject>Electric fields ; Magnetic anomalies ; Magnetic effects ; Materials Science ; Materials Science, Multidisciplinary ; Metalloids ; Optical pumping ; Physical Sciences ; Physics ; Physics, Applied ; Physics, Condensed Matter ; Science & Technology ; Sum rules ; Technology ; Terahertz frequencies ; Weight</subject><ispartof>Physical review. 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B.</au><au>Liu, Fengguang</au><au>Shen, Bing</au><au>Ni, Ni</au><au>Drew, H. D.</au><au>Jenkins, G. S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Optical evidence of the chiral magnetic anomaly in the Weyl semimetal TaAs</atitle><jtitle>Physical review. B</jtitle><stitle>PHYS REV B</stitle><addtitle>Phys Rev B</addtitle><date>2020-01-01</date><risdate>2020</risdate><volume>101</volume><issue>12</issue><spage>1</spage><pages>1-</pages><artnum>125102</artnum><issn>2469-9950</issn><eissn>2469-9969</eissn><abstract>Chiral pumping from optical electric fields oscillating at terahertz frequencies is observed in the Weyl material TaAs with electric and magnetic fields aligned along both the a and c axes. Free-carrier spectral weight enhancement is measured directly, confirming theoretical expectations of chiral pumping. 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| source | American Physical Society Journals |
| subjects | Electric fields Magnetic anomalies Magnetic effects Materials Science Materials Science, Multidisciplinary Metalloids Optical pumping Physical Sciences Physics Physics, Applied Physics, Condensed Matter Science & Technology Sum rules Technology Terahertz frequencies Weight |
| title | Optical evidence of the chiral magnetic anomaly in the Weyl semimetal TaAs |
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