Recent Publications

Role of Bright and Dark Excitons in the Temperature-Dependent Photoluminescence of Carbon Nanotubes
I. B. Mortimer and R. J. Nicholas
Phys. Rev. Lett. 98 027404 (2007)

Crystal-encapsulation-induced band-structure change in single-walled carbon nanotubes: Photoluminescence and Raman spectra
Lain-Jong Li, Tsung-Wu Lin, J. Doig, I. B. Mortimer, J. G. Wiltshire, R. A. Taylor, J. Sloan, M. L. H. Green, and R. J. Nicholas
Phys. Rev. B 74 245418 (2006)

Current-driven breakdown of the quantized Hall states of a broken-gap 2D electron–hole system
K Takashina, R J Nicholas, B Kardynal1, N J Mason, D K Maude and J C Portal
Semicon. Sci. Technol. 21 1758-1763 (2006)

Photoluminescence study of aqueous-surfactant-wrapped single-walled carbon nanotubes under hydrostatic pressure
R. S. Deacon, K.-C. Chuang, J. Doig, I. B. Mortimer and R.J. Nicholas
Phys. Rev. B 74 201402(R) (2006)

The effects of nitrogen and boron doping on the optical emission and diameters of single-walled carbon nanotubes
Lain-Jong Li, M. Glerup, A.N. Khlobystov, J.G. Wiltshire, J.-L. Sauvajol, R.A. Taylor and R.J. Nicholas
CARBON 44 (13): 2752-2757 (2006)

Stark magnetophonon resonances in Wannier-Stark localized InAs/GaSb superlattices
R.S. Deacon, R.J. Nicholas and P.S. Shields
Phys. Rev. B 74 121306 (2006)

Temperature induced restoration of fluorescence from oxidised single-walled carbon nanotubes in aqueous sodium dodecylsulfate solution
A. Nish, R. J. Nicholas
Phys. Chem. Chem. Phys. 30 3547 (2006)

Chirality Dependent Boron Mediated Growth of Nitrogen Doped Single-Walled Carbon Nanotubes
J.G. Wiltshire, M. Glerup, A.N. Khlobystov, Lain-Jong Li, L.M. Herz, J.–L. Sauvajol, R.J. Nicholas
Phys. Rev. B 72 205431 (2005)

Diameter-Selective Encapsulation of Metallocenes in Single-Walled Carbon Nanotubes
L.J. Li, A. N. Khlobystov, J. G. Wiltshire, G. A. D. Briggs and R. J. Nicholas
Nature Materials 6 481 (2005)

Magnetic separation of Fe catalyst from single-walled carbon nanotubes in an aqueous surfactant solution
J.G. Wiltshire, L.J. Li, A.N. Khlobystov, C.J. Padbury, G.A.D. Briggs and R.J. Nicholas
Carbon 43 1151 (2005)

Comparative study of photoluminescence of single-walled carbon nanotubes wrapped with sodium dodecyl sulfate, surfactin and polyvinylpyrrolidone
L.J. Li, R.J. Nicholas, C.C. Chen, R.C. Darton and S.C. Baker
Nanotechnology 16 S202 (2005)

Observation of skyrmions in a two-dimensional hole system
C. M. Townsley, R. Chughtai, R. J. Nicholas, and M. Henini
Phys. Rev. B 71 073303 (2005)

Comparative studies on acid and thermal based selective purification of HiPCO produced single-walled carbon nanotubes
J. G. Wiltshire, A. N. Khlobystov, L. J. Li, S. G. Lyapin, G. A. D. Briggs and R. J. Nicholas
Chem. Phys. Lett. 386 239 (2004)

Chirality Assignment of Single-Walled Carbon Nanotubes with Strain
L.J. Li, R.J. Nicholas, R.S. Deacon and P.A. Shield
Phys. Rev. Lett. 93 156104 (2004)

Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes
L.J. Li and R.J. Nicholas
Nanotechnology 15 1844 (2004)

Magneto-photoluminescence of chirality-characterized single-walled carbon nanotubes
L.J. Li and R.J. Nicholas
Int. J. Mod. Phys. B 18 3509 (2004)

Mid-infrared electroluminescence from coupled quantum dots and wells
P.A. Shields, C.W. Bumby, L.J. Li and R.J. Nicholas
J. Appl. Phys. 96 2725 (2004)

Mid-infrared luminescence from coupled quantum dots and wells
P.A. Shields, L.J. Li and R.J. Nicholas
Physica E 21 341 (2004)

Properties of narrow gap quantum dots and wells in the InAs/InSb/GaSb systems
P.A. Shields, R.J. Nicholas, R.A. Child, L.J. Li, E. Alphandery, N.J. Mason, C. Bumby and P. Mock
Physica E 20 204 (2004)

Effects of electron-hole hybridization on cyclotron resonance in InAs/GaSb heterostructures
C. Petchsingh, R.J. Nicholas, K. Takashina, N.J. Mason, and J. Zeman
Phys. Rev. B 70 155306 (2004)

Insulating states of a broken-gap two-dimensional electron-hole system
K. Takashina, R.J. Nicholas, B. Kardynal, N.J. Mason, D.K. Maude, and J.C. Portal
Phys. Rev. B 68 235303 (2003)

Far-infrared modulated photoluminescence spectroscopy of InSb/GaSb quantum dot structures
R.A. Child, R.J. Nicholas, N.J. Mason, P.A. Shields, J.-P.R. Wells, I.V. Bradley, J. Phillips, and B.N. Murdin
Phys. Rev. B 68 165307 (2003)

The quantum Hall effect in an InAs/GaSb based electron-hole system and its current-driven breakdown
K. Takashina, R.J. Nicholas, B. Kardynal, N.J. Mason, D.K. Maude and J.C. Portal
Physica E 12 161 (2002)

Tunable mid-IR emission using a novel quantum dot-quantum well coupled system
R.A. Child, R.J. Nicholas, N.J. Mason and E. Alphandery
Physica E 13 241 (2002)

Observation of magnetophotoluminescence from a GaN/AlxGa1-xN heterojunction
P.A. Shields, R.J. Nicholas, K. Takashina, N. Grandjean, and J. Massies
Phys. Rev. B 65 195320 (2002)

Vertical transport and electroluminescence in InAs/GaSb/InAs structures: GaSb thickness and hydrostatic pressure studies
M. Roberts, Y.C. Chung, S. Lyapin, N.J. Mason, R.J. Nicholas, and P.C. Klipstein
Phys. Rev. B 65 235326 (2002)

Measurements of composite fermion masses from the spin polarization of two-dimensional electrons in the region 1<nu<2
R. Chughtai, V. Zhitomirsky, R.J. Nicholas, and M. Henini
Phys. Rev. B 65 161305 (2002)

Photoluminescence of self-assembled InSb quantum dots grown on GaSb as a function of excitation power, temperature, and magnetic field
E. Alphandéry, R.J. Nicholas, N.J. Mason, S.G. Lyapin, and P.C. Klipstein
Phys. Rev. B 65 115322 (2002)

Excitonic properties of ZnS quantum wells
B. Urbaszek, C.M. Townsley, X. Tang, C. Morhain, A. Balocchi, K.A. Prior, R.J. Nicholas, and B.C. Cavenett
Phys. Rev. B 64 155321 (2001)

Free-carrier effects in gallium nitride epilayers: Valence-band dispersion
P.A. Shields, R.J. Nicholas, F.M. Peeters, B. Beaumont, and P. Gibart
Phys. Rev. B 64 081203 (2001)

Magnetophotoluminescence of GaN/AlxGa1-xN quantum wells: Valence band reordering and excitonic binding energies
P.A. Shields, R.J. Nicholas, N. Grandjean, and J. Massies
Phys. Rev. B 63 245319 (2001)

Metal-insulator oscillations in a two-dimensional electron-hole system
R.J. Nicholas, K. Takashina, M. Lakrimi, B. Kardynal, S. Khym, N.J. Mason, D.M. Symons, D.K. Maude and J.C. Portal
Phys. Rev. Lett. 85 2364 (2000)

Band-offset determination and excitons in SiGe/Si(001) quantum wells
H.H. Cheng, S.T. Yen, and R.J. Nicholas
Phys. Rev. B 62 4638 (2000)

Optical probing of the minigap in InAs/GaSb superlattices
A.J.L. Poulter, M. Lakrimi, R.J. Nicholas, N.J. Mason, and P.J. Walker
Phys. Rev. B 60 1884-1891 (1999)

Intersubband transitions in InAs/GaSb semimetallic superlattices
A.J.L. Poulter, M. Lakrimi, R.J. Nicholas, N.J. Mason, and P.J. Walker
Phys. Rev. B 59 10785-10791 (1999)

Magnetic breakdown in the semimetallic InAs/GaSb system
D.M. Symons, M. Lakrimi, R.J. Nicholas, D.K. Maude, J.C. Portal, N.J. Mason, and P.J. Walker
Phys. Rev. B 58 7292-7299 (1998)

High-field cyclotron resonance in the conduction bands of GaSb and effective-mass parameters at the L points
H.Arimoto, N.Miura, R.J. Nicholas, N.J. Mason, and P.J. Walker
Phys. Rev. B 58 4560-4565 (1998)