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Anderson Localization of Thermal Phonons Leads to a Thermal Conductivity Maximum

Journal Article · · Nano Letters
Our elastic model of ErAs disordered GaAs/AlAs superlattices exhibits a local thermal conductivity maximum as a function of length due to exponentially suppressed Anderson-localized phonons. By analyzing the sample-to-sample fluctuations in the dimensionless conductance, g, the transition from diffusive to localized transport is identified as the crossover from the multichannel to single-channel transport regime g ≈ 1. Single parameter scaling is shown to hold in this crossover regime through the universality of the probability distribution of g that is independent of system size and disorder strength.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Organization:
USDOE SC Office of Basic Energy Sciences (SC-22)
Grant/Contract Number:
SC0001299
OSTI ID:
1388424
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 12 Vol. 16; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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