Thermal Relaxation in Titanium Nanowires: Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer

Teemu Elo; Pasi Lähteenmäki; Dmitri Golubev; Alexander Savin; Konstantin Arutyunov; Pertti Hakonen

doi:10.1007/s10909-017-1802-2

Thermal Relaxation in Titanium Nanowires: Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer

Teemu Elo, Pasi Lähteenmäki, Dmitri Golubev, Alexander Savin, Konstantin Arutyunov, Pertti Hakonen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

9 Citations (Scopus)

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Abstract

We have employed noise thermometry for investigations of thermal relaxation between the electrons and the substrate in nanowires patterned from 40-nm-thick titanium film on top of silicon wafers covered by a native oxide. By controlling the electronic temperature (Formula presented.) by Joule heating at the base temperature of a dilution refrigerator, we probe the electron–phonon coupling and the thermal boundary resistance at temperatures (Formula presented.)–3 K. Using a regular (Formula presented.)-dependent electron–phonon coupling of clean metals and a (Formula presented.)-dependent interfacial heat flow, we deduce a small contribution for the direct energy transfer from the titanium electrons to the substrate phonons due to inelastic electron-boundary scattering.

Original language	English
Pages (from-to)	204–216
Number of pages	13
Journal	Journal of Low Temperature Physics
Volume	189
Issue number	3-4
DOIs	https://doi.org/10.1007/s10909-017-1802-2
Publication status	Published - 16 Aug 2017
MoE publication type	A1 Journal article-refereed

Keywords

Electron-phonon coupling
Electronic Kapitza conductance
Kapitza resistance
Shot noise thermometry
Thermal contact
Thermal relaxation
Titanium

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10.1007/s10909-017-1802-2

Titanium_el_ph_resubmit_finAccepted author manuscript, 1.06 MB

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title = "Thermal Relaxation in Titanium Nanowires: Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer",

abstract = "We have employed noise thermometry for investigations of thermal relaxation between the electrons and the substrate in nanowires patterned from 40-nm-thick titanium film on top of silicon wafers covered by a native oxide. By controlling the electronic temperature (Formula presented.) by Joule heating at the base temperature of a dilution refrigerator, we probe the electron–phonon coupling and the thermal boundary resistance at temperatures (Formula presented.)–3 K. Using a regular (Formula presented.)-dependent electron–phonon coupling of clean metals and a (Formula presented.)-dependent interfacial heat flow, we deduce a small contribution for the direct energy transfer from the titanium electrons to the substrate phonons due to inelastic electron-boundary scattering.",

keywords = "Electron-phonon coupling, Electronic Kapitza conductance, Kapitza resistance, Shot noise thermometry, Thermal contact, Thermal relaxation, Titanium",

author = "Teemu Elo and Pasi L{\"a}hteenm{\"a}ki and Dmitri Golubev and Alexander Savin and Konstantin Arutyunov and Pertti Hakonen",

note = "| openaire: EC/H2020/670743/EU//QuDeT",

year = "2017",

month = aug,

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doi = "10.1007/s10909-017-1802-2",

language = "English",

volume = "189",

pages = "204–216",

journal = "Journal of Low Temperature Physics",

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T1 - Thermal Relaxation in Titanium Nanowires

T2 - Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer

AU - Elo, Teemu

AU - Lähteenmäki, Pasi

AU - Golubev, Dmitri

AU - Savin, Alexander

AU - Arutyunov, Konstantin

AU - Hakonen, Pertti

N1 - | openaire: EC/H2020/670743/EU//QuDeT

PY - 2017/8/16

Y1 - 2017/8/16

N2 - We have employed noise thermometry for investigations of thermal relaxation between the electrons and the substrate in nanowires patterned from 40-nm-thick titanium film on top of silicon wafers covered by a native oxide. By controlling the electronic temperature (Formula presented.) by Joule heating at the base temperature of a dilution refrigerator, we probe the electron–phonon coupling and the thermal boundary resistance at temperatures (Formula presented.)–3 K. Using a regular (Formula presented.)-dependent electron–phonon coupling of clean metals and a (Formula presented.)-dependent interfacial heat flow, we deduce a small contribution for the direct energy transfer from the titanium electrons to the substrate phonons due to inelastic electron-boundary scattering.

AB - We have employed noise thermometry for investigations of thermal relaxation between the electrons and the substrate in nanowires patterned from 40-nm-thick titanium film on top of silicon wafers covered by a native oxide. By controlling the electronic temperature (Formula presented.) by Joule heating at the base temperature of a dilution refrigerator, we probe the electron–phonon coupling and the thermal boundary resistance at temperatures (Formula presented.)–3 K. Using a regular (Formula presented.)-dependent electron–phonon coupling of clean metals and a (Formula presented.)-dependent interfacial heat flow, we deduce a small contribution for the direct energy transfer from the titanium electrons to the substrate phonons due to inelastic electron-boundary scattering.

KW - Electron-phonon coupling

KW - Electronic Kapitza conductance

KW - Kapitza resistance

KW - Shot noise thermometry

KW - Thermal contact

KW - Thermal relaxation

KW - Titanium

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DO - 10.1007/s10909-017-1802-2

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SN - 0022-2291

VL - 189

SP - 204

EP - 216

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 3-4

ER -

Thermal Relaxation in Titanium Nanowires: Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer

Abstract

Keywords

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QuDeT: Quantum devices in topological matter: carbon nanotubes, graphene, and novel superfluids

Centre of Excellence in Low Temperature Quantum Phenomena and Devices

OtaNano – Low Temperature Laboratory

Cite this

Thermal Relaxation in Titanium Nanowires: Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer

Abstract

Keywords

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Projects

QuDeT: Quantum devices in topological matter: carbon nanotubes, graphene, and novel superfluids

Centre of Excellence in Low Temperature Quantum Phenomena and Devices

Equipment

OtaNano – Low Temperature Laboratory

Cite this