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Local Thermodynamic Measurements of Semiconductor Moire Systems
Local Thermodynamic Measurements of Semiconductor Moire Systems
Local Thermodynamic Measurements of Semiconductor Moire Systems

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152744
ISBN  
9798342107303
DDC  
515.39
저자명  
Rios, Carlos Roberto Kometter.
서명/저자  
Local Thermodynamic Measurements of Semiconductor Moire Systems
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
239 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
주기사항  
Advisor: Feldman, Ben.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약Semiconductor moire superlattices provide an ideal platform to study strongly correlated quantum phases due to their high degree of tunability and the diverse array of interaction-driven ground states they host. These superlattices are formed by stacking two or more two-dimensional semiconductors with a slight twist or lattice mismatch, resulting in a periodic moire pattern with a much larger unit cell compared to the original lattices.In this thesis, I present a series of local electronic compressibilty measurements using a scanning single-electron transistor (SET) to analyze local properties of correlated states in semiconductor moire systems. First, I review two phenomena in lattice systems with very large lattice constants: Hofstadter's physics and generalized Wigner crystals (GWC). By employing a scanning SET, we achieve high-resolution measurements of the local electronic compressibility and chemical potential in these moire superlattices.Then, I describe measurements of a twisted WSe2/MoSe2heterobilayer, where the coexistence of flat and dispersive moire bands leads to intricate competition between Hofstadter and GWCs. I discuss how these charge-ordered states form spatial domains and how these domains respond to twist angle disorder and both intrinsic and extrinsic potentials at mesoscopic scales. Finally, I present measurements on twisted bilayer WSe2, where interlayer tunneling must be taken into account and leads to topological bands.
일반주제명  
Fractals
일반주제명  
Phase transitions
일반주제명  
Energy
일반주제명  
Electrons
일반주제명  
Transistors
일반주제명  
Quantum dots
일반주제명  
Magnetic fields
일반주제명  
Electric fields
일반주제명  
Atomic physics
일반주제명  
Electromagnetics
일반주제명  
Quantum physics
일반주제명  
Thermodynamics
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
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MARC

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■006m          o    d                
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■020    ▼a9798342107303
■035    ▼a(MiAaPQ)AAI31520268
■035    ▼a(MiAaPQ)Stanfordfn043zj8338
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a515.39
■1001  ▼aRios,  Carlos  Roberto  Kometter.
■24510▼aLocal  Thermodynamic  Measurements  of  Semiconductor  Moire  Systems
■260    ▼a[Sl]▼bStanford  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a239  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-04,  Section:  B.
■500    ▼aAdvisor:  Feldman,  Ben.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aSemiconductor  moire  superlattices  provide  an  ideal  platform  to  study  strongly  correlated  quantum  phases  due  to  their  high  degree  of  tunability  and  the  diverse  array  of  interaction-driven  ground  states  they  host.  These  superlattices  are  formed  by  stacking  two  or  more  two-dimensional  semiconductors  with  a  slight  twist  or  lattice  mismatch,  resulting  in  a  periodic  moire  pattern  with  a  much  larger  unit  cell  compared  to  the  original  lattices.In  this  thesis,  I  present  a  series  of  local  electronic  compressibilty  measurements  using  a  scanning  single-electron  transistor  (SET)  to  analyze  local  properties  of  correlated  states  in  semiconductor  moire  systems.  First,  I  review  two  phenomena  in  lattice  systems  with  very  large  lattice  constants:  Hofstadter's  physics  and  generalized  Wigner  crystals  (GWC).  By  employing  a  scanning  SET,  we  achieve  high-resolution  measurements  of  the  local  electronic  compressibility  and  chemical  potential  in  these  moire  superlattices.Then,  I  describe  measurements  of  a  twisted  WSe2/MoSe2heterobilayer,  where  the  coexistence  of  flat  and  dispersive  moire  bands  leads  to  intricate  competition  between  Hofstadter  and  GWCs.  I  discuss  how  these  charge-ordered  states  form  spatial  domains  and  how  these  domains  respond  to  twist  angle  disorder  and  both  intrinsic  and  extrinsic  potentials  at  mesoscopic  scales.  Finally,  I  present  measurements  on  twisted  bilayer  WSe2,  where  interlayer  tunneling  must  be  taken  into  account  and  leads  to  topological  bands.
■590    ▼aSchool  code:  0212.
■650  4▼aFractals
■650  4▼aPhase  transitions
■650  4▼aEnergy
■650  4▼aElectrons
■650  4▼aTransistors
■650  4▼aQuantum  dots
■650  4▼aMagnetic  fields
■650  4▼aElectric  fields
■650  4▼aAtomic  physics
■650  4▼aElectromagnetics
■650  4▼aQuantum  physics
■650  4▼aThermodynamics
■690    ▼a0791
■690    ▼a0748
■690    ▼a0607
■690    ▼a0599
■690    ▼a0348
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g86-04B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163718▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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