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Lee, Sungsik,Nathan, Arokia,Alexander-Webber, Jack,Braeuninger-Weimer, Philipp,Sagade, Abhay A.,Lu, Haichang,Hasko, David,Robertson, John,Hofmann, Stephan American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.13
<P>A positive shift in the Dirac point in graphene field-effect transistors was observed with Hall-effect measurements coupled with Kelvin-probe measurements at room temperature. This shift can be explained by the asymmetrical behavior of the contact resistance by virtue of the electron injection barrier at the source contact. As an outcome, an intrinsic resistance is given to allow a retrieval of an intrinsic carrier mobility found to be decreased with increasing gate bias, suggesting the dominance of short-range scattering in a single-layer graphene field-effect transistor. These results analytically correlate the field-effect parameters with intrinsic graphene properties.</P> [FIG OMISSION]</BR>
R.R. Ahire,Abhay A. Sagade,S.D. Chavhan,V. Huse,F. Singh,D.K. Avasthi,D.M. Phase,Ramphal Sharma 한국물리학회 2009 Current Applied Physics Vol.9 No.3
Modified chemical bath deposited (MCBD) bismuth sulphide (Bi2S3) thin films’ structural, optical and electrical properties are engineered separately by annealing in air for 1 h at 300 ℃ and irradiating with 100 MeV Au swift heavy ions (SHI) at 5 × 1012 ions/㎠ fluence. It is observed that the band gap of the films gets red shifted after annealing and irradiation from pristine (as deposited) films. In addition, there is an increase in the grain size of the films due to both annealing and irradiation, leading to the decrease in resistivity and increase in thermoemf of the films. These results were explained in the light of thermal spike model. Modified chemical bath deposited (MCBD) bismuth sulphide (Bi2S3) thin films’ structural, optical and electrical properties are engineered separately by annealing in air for 1 h at 300 ℃ and irradiating with 100 MeV Au swift heavy ions (SHI) at 5 × 1012 ions/㎠ fluence. It is observed that the band gap of the films gets red shifted after annealing and irradiation from pristine (as deposited) films. In addition, there is an increase in the grain size of the films due to both annealing and irradiation, leading to the decrease in resistivity and increase in thermoemf of the films. These results were explained in the light of thermal spike model.