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Hybrid Metal-Semiconductor Quantum Dots as a Platform for Quantum Simulation of Kondo Lattice Models
Hybrid Metal-Semiconductor Quantum Dots as a Platform for Quantum Simulation of Kondo Lattice Models
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105612
- ISBN
- 9798265429551
- DDC
- 000
- 저자명
- Sriram, Praveen.
- 서명/저자
- Hybrid Metal-Semiconductor Quantum Dots as a Platform for Quantum Simulation of Kondo Lattice Models
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 237 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
- 주기사항
- Advisor: Goldhaber-Gordon, David.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약Quantum systems that host exotic material phenomena-such as unconventional superconductivity and strong magnetism-are governed by complex many-body interactions at the microscopic scale. Simplified models such as the Kondo lattice capture essential aspects of these systems, but even these abstractions quickly exceed the capabilities of classical simulation. This challenge motivates the development of engineered quantum simulators: controllable, scalable platforms that can emulate strongly correlated physics.In this dissertation, we present a new approach to quantum simulation based on hybrid metal-semiconductor quantum dots. These devices combine the uniformity of metallic islands with the tunability of semiconductor heterostructures, offering a pathway to scalable arrays that connect to bulk material properties. In particular, we focus on hybrid metal--InAs quantum dots, a promising platform for probing lattice coherence over a wide temperature range relevant to heavy fermion materials.After introducing the motivation and theoretical context, we describe the growth and characterization of InAs quantum wells that host these devices, including transport in the integer quantum Hall regime. We then demonstrate smooth, monotonic control of edge-mode transmission using quantum point contacts, a key ingredient for defining hybrid dots with tunable couplings. Building on this, we characterize submicron metallic islands coupled to quantum Hall edge states, developing a Landauer--Buttiker model to extract their transparency. We identify challenges with conventional Ti/Au islands and establish robust contacts using PdGe, achieving reproducible high-transparency coupling.Integrating these components, we realize hybrid metal--InAs quantum dots. These devices exhibit a four-fold enhancement of charging energy compared to the GaAs platform. They display exceptional uniformity in charge quantization, control of tunneling from the weak- to strong-coupling limits, culminating in the quenching of charge quantization at the ballistic limit with a transition from static to dynamical Coulomb blockade. Preliminary work with Ge/SiGe quantum wells is also presented, pointing to future opportunities for reduced disorder and improved scalability.Together, these results establish hybrid metal--InAs quantum dots as a highly controllable and scalable platform for exploring emergent behavior in correlated electron systems. They open a pathway toward simulating coherence in Kondo lattice models and, more broadly, toward engineering quantum matter.
- 일반주제명
- Summer school
- 일반주제명
- Electrons
- 일반주제명
- Spectrum analysis
- 일반주제명
- Quantum dots
- 일반주제명
- Magnetic fields
- 일반주제명
- Pandemics
- 일반주제명
- Analytical chemistry
- 일반주제명
- Atomic physics
- 일반주제명
- Epidemiology
- 일반주제명
- Optics
- 일반주제명
- Education
- 일반주제명
- Electromagnetics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-05A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■1001 ▼aSriram, Praveen.
■24510▼aHybrid Metal-Semiconductor Quantum Dots as a Platform for Quantum Simulation of Kondo Lattice Models
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a237 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: A.
■500 ▼aAdvisor: Goldhaber-Gordon, David.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aQuantum systems that host exotic material phenomena-such as unconventional superconductivity and strong magnetism-are governed by complex many-body interactions at the microscopic scale. Simplified models such as the Kondo lattice capture essential aspects of these systems, but even these abstractions quickly exceed the capabilities of classical simulation. This challenge motivates the development of engineered quantum simulators: controllable, scalable platforms that can emulate strongly correlated physics.In this dissertation, we present a new approach to quantum simulation based on hybrid metal-semiconductor quantum dots. These devices combine the uniformity of metallic islands with the tunability of semiconductor heterostructures, offering a pathway to scalable arrays that connect to bulk material properties. In particular, we focus on hybrid metal--InAs quantum dots, a promising platform for probing lattice coherence over a wide temperature range relevant to heavy fermion materials.After introducing the motivation and theoretical context, we describe the growth and characterization of InAs quantum wells that host these devices, including transport in the integer quantum Hall regime. We then demonstrate smooth, monotonic control of edge-mode transmission using quantum point contacts, a key ingredient for defining hybrid dots with tunable couplings. Building on this, we characterize submicron metallic islands coupled to quantum Hall edge states, developing a Landauer--Buttiker model to extract their transparency. We identify challenges with conventional Ti/Au islands and establish robust contacts using PdGe, achieving reproducible high-transparency coupling.Integrating these components, we realize hybrid metal--InAs quantum dots. These devices exhibit a four-fold enhancement of charging energy compared to the GaAs platform. They display exceptional uniformity in charge quantization, control of tunneling from the weak- to strong-coupling limits, culminating in the quenching of charge quantization at the ballistic limit with a transition from static to dynamical Coulomb blockade. Preliminary work with Ge/SiGe quantum wells is also presented, pointing to future opportunities for reduced disorder and improved scalability.Together, these results establish hybrid metal--InAs quantum dots as a highly controllable and scalable platform for exploring emergent behavior in correlated electron systems. They open a pathway toward simulating coherence in Kondo lattice models and, more broadly, toward engineering quantum matter.
■590 ▼aSchool code: 0212.
■650 4▼aSummer school
■650 4▼aElectrons
■650 4▼aSpectrum analysis
■650 4▼aQuantum dots
■650 4▼aMagnetic fields
■650 4▼aPandemics
■650 4▼aAnalytical chemistry
■650 4▼aAtomic physics
■650 4▼aEpidemiology
■650 4▼aOptics
■650 4▼aEducation
■650 4▼aElectromagnetics
■690 ▼a0486
■690 ▼a0748
■690 ▼a0766
■690 ▼a0752
■690 ▼a0515
■690 ▼a0607
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-05A.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360732▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


