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Emergent Phenomena in Two-Dimensiona...

Huang, Bevin.

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Emergent Phenomena in Two-Dimensional Magnetic Crystals.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Emergent Phenomena in Two-Dimensional Magnetic Crystals./
作者:	Huang, Bevin.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	135 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-04, Section: B.
Contained By:	Dissertations Abstracts International82-04B.
標題:	Condensed matter physics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28088182
ISBN:	9798684659980

Emergent Phenomena in Two-Dimensional Magnetic Crystals.
Huang, Bevin.

Emergent Phenomena in Two-Dimensional Magnetic Crystals. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 135 p.

Source: Dissertations Abstracts International, Volume: 82-04, Section: B.

Thesis (Ph.D.)--University of Washington, 2020.

This item must not be sold to any third party vendors.

Two-dimensional (2D) van der Waals (vdW) crystals and their heterostructures offer a simple, yet powerful platform for discovering emergent phenomena and implementing device structures in the atomically thin limit. Fervent work over the past several years has pushed this frontier to include magnetism. These advances have brought forth a new wave of layered materials that intrinsically possess a wide variety of magnetic properties and are significant in integrating exchange and spin-orbit interactions into vdW heterostructures. In this thesis, we will focus on exploring the tantalizing physics that has been enabled by the discovery of one of these 2D magnetic vdW crystals, namely the magnetic insulator chromium triiodide (CrI3). While its bulk form is ferromagnetic, emergent layer-dependent magnetism is observed when CrI3 is cleaved down to just a countable number of layers - it is a ferromagnet in the monolayer, but a layered antiferromagnet when it possesses two to four layers. We leverage this unprecedented magnetic behavior to demonstrate the electrical control of 2D magnetism in bilayer CrI3, an important step towards realizing efficient, low-power spintronics devices for computing and memory storage applications. We also uncover a host of magneto-optical phenomena that arise from symmetry-breaking in a 2D magnetic insulator: electrical generation of Kerr signal in a layered antiferromagnet; giant polarization rotation and magnetoelectrical manipulation of Raman phonon selection rules; and discrete angular momentum conservation and its imprint on 2D magnon optical selection rules.

ISBN: 9798684659980Subjects--Topical Terms:

3173567
Condensed matter physics.
Subjects--Index Terms:

2D magnetism

Emergent Phenomena in Two-Dimensional Magnetic Crystals.
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520 $a Two-dimensional (2D) van der Waals (vdW) crystals and their heterostructures offer a simple, yet powerful platform for discovering emergent phenomena and implementing device structures in the atomically thin limit. Fervent work over the past several years has pushed this frontier to include magnetism. These advances have brought forth a new wave of layered materials that intrinsically possess a wide variety of magnetic properties and are significant in integrating exchange and spin-orbit interactions into vdW heterostructures. In this thesis, we will focus on exploring the tantalizing physics that has been enabled by the discovery of one of these 2D magnetic vdW crystals, namely the magnetic insulator chromium triiodide (CrI3). While its bulk form is ferromagnetic, emergent layer-dependent magnetism is observed when CrI3 is cleaved down to just a countable number of layers - it is a ferromagnet in the monolayer, but a layered antiferromagnet when it possesses two to four layers. We leverage this unprecedented magnetic behavior to demonstrate the electrical control of 2D magnetism in bilayer CrI3, an important step towards realizing efficient, low-power spintronics devices for computing and memory storage applications. We also uncover a host of magneto-optical phenomena that arise from symmetry-breaking in a 2D magnetic insulator: electrical generation of Kerr signal in a layered antiferromagnet; giant polarization rotation and magnetoelectrical manipulation of Raman phonon selection rules; and discrete angular momentum conservation and its imprint on 2D magnon optical selection rules.
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