Yazar "Çağın, Tahir" için listeleme
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Ab initio calculations of martensitic phase behavior in Ni2FeGa magnetic shape memory alloys
Soykan, C.; Kart, S. Özdemir; Sevik, Cem; Çağın, Tahir (Elsevier Science Sa, 2014)A series of spin polarized energy calculations based on density functional theory (DFT) have been carried out to investigate the structural, magnetic, electronic and mechanical properties of Ni2FeGa magnetic shape memory ... -
A bottom-up route to enhance thermoelectric figures of merit in graphene nanoribbons
Sevinçli, Haldun; Sevik, Cem; Çağın, Tahir; Cuniberti, Gianaurelio (Nature Publishing Group, 2013)We propose a hybrid nano-structuring scheme for tailoring thermal and thermoelectric transport properties of graphene nanoribbons. Geometrical structuring and isotope cluster engineering are the elements that constitute ... -
Equilibrium limit of thermal conduction and boundary scattering in nanostructures
Haskins, Justin B.; Kınacı, Alper; Sevik, Cem; Çağın, Tahir (Amer Inst Physics, 2014)Determining the lattice thermal conductivity (kappa) of nanostructures is especially challenging in that, aside from the phonon-phonon scattering present in large systems, the scattering of phonons from the system boundary ... -
Influence of disorder on thermal transport properties of boron nitride nanostructures
Sevik, Cem; Kınacı, Alper; Haskins, Justin B.; Çağın, Tahir (Amer Physical Soc, 2012)The impact of isotopes on thermal transport in boron nitride nanotubes (BNNTs) and boron nitride white graphene is systematically studied via molecular dynamic simulations. By varying the concentration of the B-10 isotope ... -
On the limitations of the DFT plus U approach to energetics of actinides
Bajaj, Saurabh; Sevik, Cem; Çağın, Tahir; Garay, Andres; Turchi, P. E. A.; Arroyave, Raymundo (Elsevier Science BV, 2012)Scalar-relativistic density functional theory calculations are performed on three phases of Np within the framework of LSDA+U approach. Material properties examined include lattice parameters, atomic volumes, bulk modulus, ... -
Tailoring Thermal Conductivity of Ge/Si Core-Shell Nanowires
Sarıkurt, Sevil; Sevik, Cem; Kınacı, Alper; Haskins, Justin B.; Çağın, Tahir (Wiley-Blackwell, 2015)Low-dimensional nanostructured materials show large variation in their thermal transport properties. Here, we investigate the influence of core-shell architecture on nanowire ( NW) thermal conductivity using molecular ... -
Thermal conductivity engineering of bulk and one-dimensional Si-Ge nanoarchitectures
Kandemir, Ali; Özden, Ayberk; Çağın, Tahir; Sevik, Cem (Taylor & Francis LTD, 2017)Various theoretical and experimental methods are utilized to investigate the thermal conductivity of nanostructured materials; this is a critical parameter to increase performance of thermoelectric devices. Among these ... -
Thermal conductivity of BN-C nanostructures
Kınacı, Alper; Haskins, Justin B.; Sevik, Cem; Çağın, Tahir (Amer Physical Soc, 2012)Chemical and structural diversity present in hexagonal boron nitride (h-BN) and graphene hybrid nanostructures provide avenues for tuning various properties for their technological applications. In this paper we investigate ... -
Thermal transport properties of MoS2 and MoSe2 monolayers
Kandemir, Ali; Yapıcıoğlu, Haluk; Kınacı, Alper; Çağın, Tahir; Sevik, Cem (IOP Publishing LTD, 2016)The isolation of single- to few-layer transition metal dichalcogenides opens new directions in the application of two-dimensional materials to nanoelectronics. The characterization of thermal transport in these new ...
