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Optical Study of Symmetry Breaking in Two-Dimensional Antiferromagnets- [electronic resource]
Optical Study of Symmetry Breaking in Two-Dimensional Antiferromagnets - [electronic resou...
Optical Study of Symmetry Breaking in Two-Dimensional Antiferromagnets- [electronic resource]

Detailed Information

자료유형  
 학위논문파일 국외
최종처리일시  
20240214101656
ISBN  
9798380327961
DDC  
530
저자명  
Hwangbo, Kyle.
서명/저자  
Optical Study of Symmetry Breaking in Two-Dimensional Antiferromagnets - [electronic resource]
발행사항  
[S.l.]: : University of Washington., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(118 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Xu, Xiaodong.
학위논문주기  
Thesis (Ph.D.)--University of Washington, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약The advent of two-dimensional (2D) materials has paved the way for the discovery and investigation of unique properties that arise from their low dimensionality. But, it also provided an avenue to study and test traditional, theoretical ideas related to long-range ordering in reduced dimensions. In particular, two-dimensional antiferromagnetism underlies many interesting and pertinent phenomena in modern condensed matter physics. However, the absence of net magnetization in systems exhibiting 2D antiferromagnetic order poses significant experimental challenges for their probing. This thesis delves into the captivating emergent optical behaviors in two-dimensional zigzag antiferromagnetic materials of the transition metal phosphorus trichalcogenide family that can be used to study 2D antiferromagnetic behavior. We first showcase zigzag antiferromagnetic order-induced excitons in NiPS3. The photoluminescence (PL) signal exhibits remarkable characteristics, including an exceptionally narrow linewidth and high linear polarization. Intriguingly, the PL intensity and polarization mirror the behavior of the zigzag antiferromagnetic order, vanishing above the Neel temperature. Our findings reveal a direct link between the exciton properties and the presence of antiferromagnetic order. Expanding our optical investigation, we demonstrate the ubiquitous presence of a linear dichroism response in the MPX3 zigzag antiferromagnets, exemplified by FePS3. The reduction of three-fold rotational symmetry to two-fold, induced by magnetic order, manifests as two-fold anisotropy in the optical response. Lastly, we demonstrate the remarkable ability to reversibly tune the three-state Potts nematicity in FePSe3 using strain. Through in-situ strain measurements, we elucidate the electronic nematic phase as the origin of the linear dichroism response. We also unveil strain-controlled nematic domain populations and the manipulation of the nematic phase transition nature. This strain control of the nematic phase provides a window into the nematic susceptibility near the magnetic ordering temperature, offering deeper insights into the behavior of these correlated materials. Through detailed optical experimental investigations, we provide a comprehensive understanding of the interplay between magnetic order, symmetry breaking, and emergent properties in zigzag antiferromagnets.
일반주제명  
Condensed matter physics.
일반주제명  
Electromagnetics.
키워드  
Unique properties
키워드  
Magnetization
키워드  
Photoluminescence
기타저자  
University of Washington Physics
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■00520240214101656
■006m          o    d                
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■020    ▼a9798380327961
■035    ▼a(MiAaPQ)AAI30635018
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a530
■1001  ▼aHwangbo,  Kyle.
■24510▼aOptical  Study  of  Symmetry  Breaking  in  Two-Dimensional  Antiferromagnets▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  Washington.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(118  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Xu,  Xiaodong.
■5021  ▼aThesis  (Ph.D.)--University  of  Washington,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aThe  advent  of  two-dimensional  (2D)  materials  has  paved  the  way  for  the  discovery  and  investigation  of  unique  properties  that  arise  from  their  low  dimensionality.  But,  it  also  provided  an  avenue  to  study  and  test  traditional,  theoretical  ideas  related  to  long-range  ordering  in  reduced  dimensions.  In  particular,  two-dimensional  antiferromagnetism  underlies  many  interesting  and  pertinent  phenomena  in  modern  condensed  matter  physics.  However,  the  absence  of  net  magnetization  in  systems  exhibiting  2D  antiferromagnetic  order  poses  significant  experimental  challenges  for  their  probing.  This  thesis  delves  into  the  captivating  emergent  optical  behaviors  in  two-dimensional  zigzag  antiferromagnetic  materials  of  the  transition  metal  phosphorus  trichalcogenide  family  that  can  be  used  to  study  2D  antiferromagnetic  behavior.  We  first  showcase  zigzag  antiferromagnetic  order-induced  excitons  in  NiPS3.  The  photoluminescence  (PL)  signal  exhibits  remarkable  characteristics,  including  an  exceptionally  narrow  linewidth  and  high  linear  polarization.  Intriguingly,  the  PL  intensity  and  polarization  mirror  the  behavior  of  the  zigzag  antiferromagnetic  order,  vanishing  above  the  Neel  temperature.  Our  findings  reveal  a  direct  link  between  the  exciton  properties  and  the  presence  of  antiferromagnetic  order.  Expanding  our  optical  investigation,  we  demonstrate  the  ubiquitous  presence  of  a  linear  dichroism  response  in  the  MPX3  zigzag  antiferromagnets,  exemplified  by  FePS3.  The  reduction  of  three-fold  rotational  symmetry  to  two-fold,  induced  by  magnetic  order,  manifests  as  two-fold  anisotropy  in  the  optical  response.  Lastly,  we  demonstrate  the  remarkable  ability  to  reversibly  tune  the  three-state  Potts  nematicity  in  FePSe3  using  strain.  Through  in-situ  strain  measurements,  we  elucidate  the  electronic  nematic  phase  as  the  origin  of  the  linear  dichroism  response.  We  also  unveil  strain-controlled  nematic  domain  populations  and  the  manipulation  of  the  nematic  phase  transition  nature.  This  strain  control  of  the  nematic  phase  provides  a  window  into  the  nematic  susceptibility  near  the  magnetic  ordering  temperature,  offering  deeper  insights  into  the  behavior  of  these  correlated  materials.  Through  detailed  optical  experimental  investigations,  we  provide  a  comprehensive  understanding  of  the  interplay  between  magnetic  order,  symmetry  breaking,  and  emergent  properties  in  zigzag  antiferromagnets.
■590    ▼aSchool  code:  0250.
■650  4▼aCondensed  matter  physics.
■650  4▼aElectromagnetics.
■653    ▼aUnique  properties
■653    ▼aMagnetization
■653    ▼aPhotoluminescence
■690    ▼a0611
■690    ▼a0607
■71020▼aUniversity  of  Washington▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0250
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16934811▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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