Research Profile

Felipe Murphy-Armando

Biography

Felipe Murphy-Armando received his primary degree and MSc in Physics from Instituto Balseiro, in Bariloche, Argentina. He completed his PhD in 2007 at Tyndall Institute under the supervision of Prof. Stephen Fahy, and continued there as a post-doc in both the Condensed Matter Theory and Electronics Theory Groups.
He is now a Staff Researcher at Tyndall National Insitute, UCC

Research Interests

I am interested on the effects of electron scattering on the transport, thermoelectric and optical properties of materials.

Felipe's research interests are
  • The calculation of the resistance in materials from first principles,
  • The effect of strain on the electron-phonon and alloy scattering of SiGe alloys from first principles,
  • Alloy phonon scattering,
  • Understanding the heating processes in nanowires,
  • Elastic scattering by doping impurities in Si nanowires.

He has recently worked on the modelling and calculation of the electron phonon scattering in thin silicon nanowires. During his PhD he calculated from first principles the alloy and disoredered phonon scattering of carriers in SiGe alloys. His MSc consisted in calculating the Electron Spin Resonance of nanotubes using Tight-Binding and Density Matrix Renormalization Group theory.

Publications

Peer Reviewed Journals

 YearPublication
(2015)'Heterogeneously-Grown Tunable Tensile Strained Germanium on Silicon for Photonic Devices'
Michael Clavel, Dzianis Saladukha, Patrick S Goley, Tomasz J Ochalski, Felipe Murphy-Armando, Robert J Bodnar, Mantu K Hudait (2015) 'Heterogeneously-Grown Tunable Tensile Strained Germanium on Silicon for Photonic Devices'. ACS applied materials & interfaces, 7 (48):26470-26481   [DOI] [Details]
(2015)'Heterogeneously-Grown Tunable Tensile Strained Germanium on Silicon for Photonic Devices'
Clavel, M,Saladukha, D,Goley, PS,Ochalski, TJ,Murphy-Armando, F,Bodnar, RJ,Hudait, MK (2015) 'Heterogeneously-Grown Tunable Tensile Strained Germanium on Silicon for Photonic Devices'. Acs Applied Materials & Interfaces, 7 :26470-26481 [DOI] [Details]
(2014)'Optimized Laser Thermal Annealing on Germanium for High Dopant Activation and Low Leakage Current'
1. M. Shayesteh, D.O. Connell, F. Gity, P. Murphy-Armando, R. Yu, K. Huet, I. Toque-Tresonne, F. Cristiano, S. Boninelli, H.H. Henrichsen, P.F. Nielsen, D.H. Petersen, R. Duffy (2014) 'Optimized Laser Thermal Annealing on Germanium for High Dopant Activation and Low Leakage Current'. IEEE Transactions On Electron Devices, [Details]
(2013)'Optical Emission of a Strained Direct-Band-Gap Ge Quantum Well Embedded Inside InGaAs Alloy Layers'
Pavarelli, N and Ochalski, TJ and Murphy-Armando, F and Huo, Y and Schmidt, M and Huyet, G and Harris, JS (2013) 'Optical Emission of a Strained Direct-Band-Gap Ge Quantum Well Embedded Inside InGaAs Alloy Layers'. Physical review letters, 110 (17) [Details]
(2013)'Optical Emission of a Strained Direct-Band-Gap Ge Quantum Well Embedded Inside InGaAs Alloy Layers'
Pavarelli, N,Ochalski, TJ,Murphy-Armando, F,Huo, Y,Schmidt, M,Huyet, G,Harris, JS (2013) 'Optical Emission of a Strained Direct-Band-Gap Ge Quantum Well Embedded Inside InGaAs Alloy Layers'. Physical Review Letters, 110 [DOI] [Details]
(2013)' Optical Emission of a Strained Direct-Band-Gap Ge Quantum Well Embedded Inside InGaAs Alloy Layers'
pavarelli, n, murphy-armando,f (2013) ' Optical Emission of a Strained Direct-Band-Gap Ge Quantum Well Embedded Inside InGaAs Alloy Layers'. Physical Review Letters, 110 [Details]
(2013)'Optical emission of strained direct-band-gap Ge quantum well embedded inside InGaAs alloy layers'
N. Pavarelli, T. J. Ochalski, F. Murphy-Armando, Y. Huo, M. Schmidt, G. Huyet and J. S. Harris (2013) 'Optical emission of strained direct-band-gap Ge quantum well embedded inside InGaAs alloy layers'. Physical Review Letters, 11 [CORA Link] [Details]
(2012)'First-principles investigation of the alloy scattering potential in dilute Si1-xCx'
Vaughan, MP,Murphy-Armando, F,Fahy, S (2012) 'First-principles investigation of the alloy scattering potential in dilute Si1-xCx'. Physical Review B, 85 [DOI] [CORA Link] [Details]
(2012)'First-principles investigation of the alloy scattering potential in dilute Si1−xCx'
Vaughan, MP; F. Murphy-Armando, F; Fahy S (2012) 'First-principles investigation of the alloy scattering potential in dilute Si1−xCx'. Physical Review B, 82 [DOI] [Details]
(2012)'Giant piezoresistance in silicon-germanium alloys'
Murphy-Armando, F,Fahy, S (2012) 'Giant piezoresistance in silicon-germanium alloys'. Physical Review B, 86 [DOI] [CORA Link] [Details]
(2012)'Giant enhancement of n-type carrier mobility in highly strained germanium nanostructures (vol 109, 113703, 2011)'
Murphy-Armando, F,Fahy, S (2012) 'Giant enhancement of n-type carrier mobility in highly strained germanium nanostructures (vol 109, 113703, 2011)'. Journal of Applied Physics, 112 [DOI] [Details]
(2011)'Giant enhancement of n-type carrier mobility in highly strained germanium nanostructures'
Murphy-Armando, F,Fahy, S (2011) 'Giant enhancement of n-type carrier mobility in highly strained germanium nanostructures'. Journal of Applied Physics, 109 [DOI] [Details]
(2011)'Giant enhancement of n-type carrier mobility in highly strained germanium nanostructures'
Murphy-Armando, F. and Fahy, S. (2011) 'Giant enhancement of n-type carrier mobility in highly strained germanium nanostructures'. Journal of Applied Physics, 109 [CORA Link] [Details]
(2011)'First principles calculation of electron-phonon and alloy scattering in strained SiGe'
Murphy-Armando, F. and Fahy, S. (2011) 'First principles calculation of electron-phonon and alloy scattering in strained SiGe'. Journal of Applied Physics, 110 (12):123706-123706 [CORA Link] [Details]
(2011)'Effect of strain on the deformation potentials in Ge-like SiGe'
Murphy-Armando, F,Fahy, S; (2011) 'Effect of strain on the deformation potentials in Ge-like SiGe'. Rna-A Publication of The Rna Society, 49 :209-220 [Details]
(2010)'Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires'
Murphy-Armando, F,Fagas, G,Greer, JC; (2010) 'Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires'. Nanoletters, 10 :869-873 [DOI] [Details]
(2010)'Deformation potentials and electron-phonon coupling in silicon nanowires'
Murphy-Armando F, Fagas G, Greer JC (2010) 'Deformation potentials and electron-phonon coupling in silicon nanowires'. Nanoletters, 10 (3):869-873 [DOI] [Details]
(2010)'Deformation Potentials and Electron- Phonon Coupling in Silicon Nanowires'
Murphy-Armando, F. and Fagas, G. and Greer, JC (2010) 'Deformation Potentials and Electron- Phonon Coupling in Silicon Nanowires'. Nano letters, 10 (3):869-873 [Details]
(2010)'Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires'
Murphy-Armando, F;Fagas, G;Greer, JC (2010) 'Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires'. Nanoletters, 10 :869-873 [DOI] [Details]
(2010)'Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires'
Murphy-Armando, F.,Fagas, G.,Greer, J. C. (2010) 'Deformation Potentials and Electron-Phonon Coupling in Silicon Nanowires'. Nano Letters, 10 [Details]
(2008)'First-Principles Calculation of Carrier-Phonon Scattering In N-Type Si1-Xgex Alloys'
Murphy-Armando, F, Fahy, S; (2008) 'First-Principles Calculation of Carrier-Phonon Scattering In N-Type Si1-Xgex Alloys'. Physical Review B, 78 (3) [DOI] [CORA Link] [Details]
(2007)'First-Principles Calculation of P-Type Alloy Scattering In Si1-Xgex'
Joyce, S, Murphy-Armando, F, Fahy, S; (2007) 'First-Principles Calculation of P-Type Alloy Scattering In Si1-Xgex'. Physical Review B, 75 (15) [DOI] [CORA Link] [Details]
(2006)'First-Principles Calculation of Alloy Scattering in Ge_xSi_1-x'
Murphy-Armando, F. and Fahy, S.; (2006) 'First-Principles Calculation of Alloy Scattering in Ge_xSi_1-x'. Physical Review Letters, 97 (9)   [DOI] [CORA Link] [Details]
(2004)'Spin--orbit coupling and electron spin resonance for interacting electrons in carbon nanotubes'
De Martino, A. and Egger, R. and Murphy-Armando, F. and Hallberg, K. (2004) 'Spin--orbit coupling and electron spin resonance for interacting electrons in carbon nanotubes'. Journal of Physics: Condensed Matter, 16 (17) [Details]

Professional Activities

Conference Contributions

 YearPublication
(2012)Piezo-resistance in $ n $-type Si $ \_ $$1-x$\$ $ Ge $ \_x $ alloys as a function of alloy composition and strain,
Murphy-Armando, F. and Fahy, S. (2012) APS. [Oral Presentation], Piezo-resistance in $ n $-type Si $ \_ $$1-x$\$ $ Ge $ \_x $ alloys as a function of alloy composition and strain, Boston , 27-FEB-12 - 02-MAR-12. [Details]
(2008)First principles calculation of carrier-phonon scattering in Si nanowires,
Murphy-Armando, F. and McEniry, E.J. and Todorov, T.N. and Dundas, D. (2008) First principles calculation of carrier-phonon scattering in Si nanowires, . [Details]
(2006)Hole mobility in SiGe alloys from first principles,
Joyce, S. and Murphy-Armando, F. and Fahy, S. (2006) Hole mobility in SiGe alloys from first principles, . [Details]
(2006)First-principles calculation of phonon scattering of n-type carriers in SiGe alloys,
Murphy Armando, F. and Fahy, S. (2006) First-principles calculation of phonon scattering of n-type carriers in SiGe alloys, . [Details]
(2005)First-principles calculation of alloy scattering of n-type carriers in SiGe,
Murphy-Armando, F. and Fahy, S. (2005) First-principles calculation of alloy scattering of n-type carriers in SiGe, . [Details]

Teaching Activities

Teaching Interests

Condensed Matter Physics (PY3105)
Nanoelectronics (UE6005)

Research Information

Internal Collaborators

 NameInstituteCountry
Tomasz Ochalski Tyndall National InsituteIRELAND
Ray Duffy Tyndall National InsituteIRELAND

Contact details

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School of Biological, Earth and Environmental Sciences

An Scoil Eolaíochtaí Bitheolaíocha, Domhaneolaíocha agus Comhshaoil

University College Cork, Distillery Fields, North Mall, Cork, Ireland T23 N73K

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