Dr. Lutz Geelhaar

Type-II band alignment of zinc-blende and wurtzite segments in GaAs nanowires: A combined photoluminescence and resonant Raman scattering study

@article{ author = { P. Kusch and E. Grelich and C. Somaschini and E. Luna and M. Ramsteiner and L. Geelhaar and H. Riechert and S. Reich }, title = { Type-II band alignment of zinc-blende and wurtzite segments in GaAs nanowires: A combined photoluminescence and resonant Raman scattering study }, journal = { Physical Review B: Solid State }, volume = { 89 }, year = { 2014 }, pages = { 045310 } }

TY - JOUR AU - P. Kusch AU - E. Grelich AU - C. Somaschini AU - E. Luna AU - M. Ramsteiner AU - L. Geelhaar AU - H. Riechert AU - S. Reich TI - Type-II band alignment of zinc-blende and wurtzite segments in GaAs nanowires: A combined photoluminescence and resonant Raman scattering study JF - Physical Review B: Solid State JA - Phys. Rev. B J1 - VL - 89 SP - 045310 PY - 2014/01/27

GaN-based radial heterostructure nanowires grown by MBE and ALD

@article{ author = { L. Lari and I. M. Ross and T. Walther and K. Black and C. Chèze and L. Geelhaar and H. Riechert and P. R. Chalker }, title = { GaN-based radial heterostructure nanowires grown by MBE and ALD }, journal = { Journal of Physics: Conference Series }, volume = { 471 }, year = { 2013 }, pages = { 012039 } }

TY - JOUR AU - L. Lari AU - I. M. Ross AU - T. Walther AU - K. Black AU - C. Chèze AU - L. Geelhaar AU - H. Riechert AU - P. R. Chalker TI - GaN-based radial heterostructure nanowires grown by MBE and ALD JF - Journal of Physics: Conference Series JA - J. Phys.: Conf. Ser. J1 - VL - 471 SP - 012039 PY - 2013/12/05

GaAs-Fe_3Si Core-Shell Nanowires: Nanobar Magnets

@article{ author = { M. Hilse and J. Herfort and B. Jenichen and A. Trampert and M. Hanke and P. Schaaf and L. Geelhaar and H. Riechert }, title = { GaAs-Fe_3Si Core-Shell Nanowires: Nanobar Magnets }, journal = { Nano Letters }, volume = { 13 }, year = { 2013 }, pages = { 6203 } }

TY - JOUR AU - M. Hilse AU - J. Herfort AU - B. Jenichen AU - A. Trampert AU - M. Hanke AU - P. Schaaf AU - L. Geelhaar AU - H. Riechert TI - GaAs-Fe_3Si Core-Shell Nanowires: Nanobar Magnets JF - Nano Letters JA - Nano Lett. J1 - VL - 13 SP - 6203 PY - 2013/11/25

In situ doping of catalyst-free InAs nanowires with Si: Growth, polytypism, and local vibrational modes of Si

@article{ author = { E. Dimakis and M. Ramsteiner and C.-N. Huang and A. Trampert and A. Davydok and A. Biermanns and U. Pietsch and H. Riechert and L. Geelhaar }, title = { In situ doping of catalyst-free InAs nanowires with Si: Growth, polytypism, and local vibrational modes of Si }, journal = { Applied Physics Letters }, volume = { 103 }, year = { 2013 }, pages = { 143121 } }

TY - JOUR AU - E. Dimakis AU - M. Ramsteiner AU - C.-N. Huang AU - A. Trampert AU - A. Davydok AU - A. Biermanns AU - U. Pietsch AU - H. Riechert AU - L. Geelhaar TI - In situ doping of catalyst-free InAs nanowires with Si: Growth, polytypism, and local vibrational modes of Si JF - Applied Physics Letters JA - Appl. Phys. Lett. J1 - APL VL - 103 SP - 143121 PY - 2013/10/03

Distribution of zinc-blende twins and wurtzite segments in GaAs nanowires probed by X-ray nanodiffraction

@article{ author = { A. Biermanns and D. Carbone and S. Breuer and V. L. R. Jacques and T. Schulli and L. Geelhaar and U. Pietsch }, title = { Distribution of zinc-blende twins and wurtzite segments in GaAs nanowires probed by X-ray nanodiffraction }, journal = { Physica Status Solidi Rapid Research Letters }, volume = { 7 }, year = { 2013 }, pages = { 860 } }

TY - JOUR AU - A. Biermanns AU - D. Carbone AU - S. Breuer AU - V. L. R. Jacques AU - T. Schulli AU - L. Geelhaar AU - U. Pietsch TI - Distribution of zinc-blende twins and wurtzite segments in GaAs nanowires probed by X-ray nanodiffraction JF - Physica Status Solidi Rapid Research Letters JA - Phys. Status Solidi-Rapid Res. Lett. J1 - VL - 7 SP - 860 PY - 2013/07/04

Droplet bulge effect on the formation of nanowire side facets

@article{ author = { S. Breuer and L.-F. Feiner and L. Geelhaar }, title = { Droplet bulge effect on the formation of nanowire side facets }, journal = { Crystal Growth & Design }, volume = { 13 }, year = { 2013 }, pages = { 2749 } }

TY - JOUR AU - S. Breuer AU - L.-F. Feiner AU - L. Geelhaar TI - Droplet bulge effect on the formation of nanowire side facets JF - Crystal Growth & Design JA - Cryst. Growth Des. J1 - VL - 13 SP - 2749 PY - 2013/01/01

Height self-equilibration during the growth of dense nanowire ensembles: Order emerging from disorder

@article{ author = { K. K. Sabelfeld and V. M. Kaganer and F. Limbach and P. Dogan and O. Brandt and L. Geelhaar and H. Riechert }, title = { Height self-equilibration during the growth of dense nanowire ensembles: Order emerging from disorder }, journal = { Applied Physics Letters }, volume = { 103 }, year = { 2013 }, pages = { 133105 } }

TY - JOUR AU - K. K. Sabelfeld AU - V. M. Kaganer AU - F. Limbach AU - P. Dogan AU - O. Brandt AU - L. Geelhaar AU - H. Riechert TI - Height self-equilibration during the growth of dense nanowire ensembles: Order emerging from disorder JF - Applied Physics Letters JA - Appl. Phys. Lett. J1 - APL VL - 103 SP - 133105 PY - 2013/01/01

Mono- and few-layer nanocrystalline graphene grown on Al₂O₃(0001) by molecular beam epitaxy

@article{ author = { M. H. Oliveira Jr. and T. Schumann and R. Gargallo-Caballero and F. Fromm and T. Seyller and M. Ramsteiner and A. Trampert and L. Geelhaar and J. M. J. Lopes and H. Riechert }, title = { Mono- and few-layer nanocrystalline graphene grown on Al₂O₃(0001) by molecular beam epitaxy }, journal = { Carbon }, volume = { 56 }, year = { 2013 }, pages = { 339 } }

TY - JOUR AU - M. H. Oliveira Jr. AU - T. Schumann AU - R. Gargallo-Caballero AU - F. Fromm AU - T. Seyller AU - M. Ramsteiner AU - A. Trampert AU - L. Geelhaar AU - J. M. J. Lopes AU - H. Riechert TI - Mono- and few-layer nanocrystalline graphene grown on Al₂O₃(0001) by molecular beam epitaxy JF - Carbon JA - Carbon J1 - VL - 56 SP - 339 PY - 2013/01/01

Room-temperature electron spin amplifier based on Ga(In)NAs alloys

@article{ author = { Y. Puttisong and I. A. Buyanova and A. J. Ptak and C. W. Tu and L. Geelhaar and H. Riechert and W. M. Chen }, title = { Room-temperature electron spin amplifier based on Ga(In)NAs alloys }, journal = { Advanced Materials }, volume = { 25 }, year = { 2013 }, pages = { 738 } }

TY - JOUR AU - Y. Puttisong AU - I. A. Buyanova AU - A. J. Ptak AU - C. W. Tu AU - L. Geelhaar AU - H. Riechert AU - W. M. Chen TI - Room-temperature electron spin amplifier based on Ga(In)NAs alloys JF - Advanced Materials JA - Adv. Mater. J1 - VL - 25 SP - 738 PY - 2013/01/01

Efficient room-temperature nuclear spin hyperpolarization of a defect atom in a semiconductor

@article{ author = { Y. Puttisong and X. J. Wang and I. A. Buyanova and L. Geelhaar and H. Riechert and A. J. Ptak and C. W. Tu and W. M. Chen }, title = { Efficient room-temperature nuclear spin hyperpolarization of a defect atom in a semiconductor }, journal = { Nature Communications }, volume = { 4 }, year = { 2013 }, pages = { 1751 } }

TY - JOUR AU - Y. Puttisong AU - X. J. Wang AU - I. A. Buyanova AU - L. Geelhaar AU - H. Riechert AU - A. J. Ptak AU - C. W. Tu AU - W. M. Chen TI - Efficient room-temperature nuclear spin hyperpolarization of a defect atom in a semiconductor JF - Nature Communications JA - Nat. Commun. J1 - VL - 4 SP - 1751 PY - 2013/01/01