DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modification of electron-phonon coupling by micromachining and suspension

Abstract

Weak electron-phonon interaction in metals at low temperatures forms the basis of operation for cryogenic hot-electron bolometers and calorimeters. Here, we develop a thermometry scheme based on proximity supercurrent to study the thermal response of a thin gold film on a SiO2 platform at temperatures below 100 mK. We find that the exponent of the power law describing electron-phonon coupling in the film drops by approximately 1/2 as the platform is micromachined and released from its substrate. This contrasts the conventional theory for bulklike geometries that predicts integer-valued exponents. Here, we attribute the fractional change to a modified phonon spectrum described by recent theoretical developments.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [3];  [2]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  3. Aalto Univ. (Finland)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (SC-21)
OSTI Identifier:
1593260
Report Number(s):
BNL-212427-2019-JAAM
Journal ID: ISSN 0021-8979; TRN: US2100796
Grant/Contract Number:  
SC0012704; W911NF-13-1-0390; W911NF-18-1-0028
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 127; Journal Issue: 2; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING; Mesoscale and Nanoscale Physics

Citation Formats

Saira, Olli-Pentti, Matheny, Matthew H., Wang, Libin, Pekola, Jukka, and Roukes, Michael. Modification of electron-phonon coupling by micromachining and suspension. United States: N. p., 2020. Web. doi:10.1063/1.5132948.
Saira, Olli-Pentti, Matheny, Matthew H., Wang, Libin, Pekola, Jukka, & Roukes, Michael. Modification of electron-phonon coupling by micromachining and suspension. United States. https://doi.org/10.1063/1.5132948
Saira, Olli-Pentti, Matheny, Matthew H., Wang, Libin, Pekola, Jukka, and Roukes, Michael. Tue . "Modification of electron-phonon coupling by micromachining and suspension". United States. https://doi.org/10.1063/1.5132948. https://www.osti.gov/servlets/purl/1593260.
@article{osti_1593260,
title = {Modification of electron-phonon coupling by micromachining and suspension},
author = {Saira, Olli-Pentti and Matheny, Matthew H. and Wang, Libin and Pekola, Jukka and Roukes, Michael},
abstractNote = {Weak electron-phonon interaction in metals at low temperatures forms the basis of operation for cryogenic hot-electron bolometers and calorimeters. Here, we develop a thermometry scheme based on proximity supercurrent to study the thermal response of a thin gold film on a SiO2 platform at temperatures below 100 mK. We find that the exponent of the power law describing electron-phonon coupling in the film drops by approximately 1/2 as the platform is micromachined and released from its substrate. This contrasts the conventional theory for bulklike geometries that predicts integer-valued exponents. Here, we attribute the fractional change to a modified phonon spectrum described by recent theoretical developments.},
doi = {10.1063/1.5132948},
journal = {Journal of Applied Physics},
number = 2,
volume = 127,
place = {United States},
year = {2020},
month = {1}
}

Works referenced in this record:

Measurement of the quantum of thermal conductance
journal, April 2000

  • Schwab, K.; Henriksen, E. A.; Worlock, J. M.
  • Nature, Vol. 404, Issue 6781
  • DOI: 10.1038/35010065

Opportunities for mesoscopics in thermometry and refrigeration: Physics and applications
journal, March 2006

  • Giazotto, Francesco; Heikkilä, Tero T.; Luukanen, Arttu
  • Reviews of Modern Physics, Vol. 78, Issue 1
  • DOI: 10.1103/RevModPhys.78.217

Sensing Floquet-Majorana fermions via heat transfer
journal, September 2017


Hot electrons and energy transport in metals at millikelvin temperatures
journal, July 1985


Microwave nanobolometer based on proximity Josephson junctions
journal, August 2014


Electron–phonon heat exchange in quasi-two-dimensional nanolayers
journal, December 2017


Phonon Cooling of Nanomechanical Beams with Tunnel Junctions
journal, April 2009


Thermoelectric transport through Majorana bound states and violation of Wiedemann-Franz law
journal, October 2016


Observed quantization of anyonic heat flow
journal, April 2017

  • Banerjee, Mitali; Heiblum, Moty; Rosenblatt, Amir
  • Nature, Vol. 545, Issue 7652
  • DOI: 10.1038/nature22052

Supercurrents Through Thick, Clean S-N-S Sandwiches
journal, January 1972

  • Shepherd, J. G.
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 326, Issue 1566
  • DOI: 10.1098/rspa.1972.0018

Local Stress Measurement in Thin Thermal SiO 2 Films on Si Substrates
journal, January 1972

  • Lin, S. C. H.; Pugacz‐Muraszkiewicz, I.
  • Journal of Applied Physics, Vol. 43, Issue 1
  • DOI: 10.1063/1.1660794

Thermoelectrical detection of Majorana states
journal, May 2014


Nanosecond Thermometry with Josephson Junctions
journal, October 2018


Hot-electron effects in metals
journal, March 1994


Graphene-Based Josephson-Junction Single-Photon Detector
journal, August 2017


Josephson critical current in a long mesoscopic S-N-S junction
journal, January 2001


Heat transport in ultrathin dielectric membranes and bridges
journal, September 2004


Fast thermometry with a proximity Josephson junction
journal, January 2018

  • Wang, L. B.; Saira, O. -P.; Pekola, J. P.
  • Applied Physics Letters, Vol. 112, Issue 1
  • DOI: 10.1063/1.5010236

Low-temperature electron-phonon heat transfer in metal films
journal, March 2016


Hot electrons in low-dimensional phonon systems
journal, December 2005


Crossover temperature in electron–phonon heat exchange in layered nanostructures
journal, August 2019

  • Anghel, Dragos-Victor; Caraiani, Claudiu; Galperin, Yuri M.
  • Physica Scripta, Vol. 94, Issue 10
  • DOI: 10.1088/1402-4896/ab2346

Observation of phonon dimensionality effects on electron energy relaxation
journal, June 2007


Low-temperature characterization of Nb-Cu-Nb weak links with Ar ion-cleaned interfaces
journal, January 2016

  • Jabdaraghi, R. N.; Peltonen, J. T.; Saira, O. -P.
  • Applied Physics Letters, Vol. 108, Issue 4
  • DOI: 10.1063/1.4940979

Intrinsic Stress in Evaporated Metal Films
journal, January 1969

  • Klokholm, E.
  • Journal of Vacuum Science and Technology, Vol. 6, Issue 1
  • DOI: 10.1116/1.1492645

Influence of Phonon Dimensionality on Electron Energy Relaxation
journal, October 2007


Effect of ac Impedance on dc Voltage‐Current Characteristics of Superconductor Weak‐Link Junctions
journal, June 1968

  • McCumber, D. E.
  • Journal of Applied Physics, Vol. 39, Issue 7
  • DOI: 10.1063/1.1656743

Superconducting weak links
journal, January 1979


Current‐Voltage Characteristics of Josephson Junctions
journal, April 1968


Electron-phonon scattering rates in disordered metallic films below 1 K
journal, October 1992


Origin of Hysteresis in a Proximity Josephson Junction
journal, August 2008


Properties of the Phonon Gas in Ultrathin Membranes at Low Temperature
journal, October 1998


Origin of Hysteresis in a Proximity Josephson Junction
text, January 2008


Thermoelectrical detection of Majorana states
text, January 2013


Sensing Floquet-Majorana fermions via heat transfer
text, January 2017


Hot electrons in low-dimensional phonon systems
text, January 2005