Signatures of hydrodynamic transport in an electron system
Name
1082867657-MIT.pdf
Description
Full printable version
Size
5.73 MB
Format
Adobe PDF
Checksum (MD5)
63fdda16709a2e9d51b61ddfe92d7554
Author(s)
Guo, Haoyu, S.B. Massachusetts Institute of Technology
Advisor(s)
Leonid S. Levitov.
Date Issued
2018
Publisher
Massachusetts Institute of Technology
Abstract
Electrons in strongly-correlated systems move in a neatly coordinated manner, in many ways resembling the movement of viscous fluids and leading to surprising collective behaviors. Here we explore how the hydrodynamic behavior manifests itself in the electron transport through nanoscale constrictions. Free electron flows through constrictions in metals are often regarded as an ultimate high-conduction charge transfer mechanism. However, as shown in this thesis, interactions can facilitate transport and give rise to super-ballistic conduction, allowing conductance to exceed the ballistic limit value. In other words, interactions and viscous effects, rather than presenting a hindrance for conduction, help increase carrier mobility and suppress dissipation. This interesting behavior represents a clear signature of the electron hydrodynamic regime, and provides a way to determine electron viscosity. These results show that interactions and viscous effects can facilitate high-mobility transport, granting a new route for designing low-power nanoscale devices.
Description
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2018.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 63-64).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
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