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ISSN:    frecuency : 4   format : Electrónica

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Volume 22 Number 1 Year 2012

11 articles in this issue 

Hoang Ngoc Long,Nguyen Thi Kim Ngan

Renormalization group equations of the 3-3-1 models with A4 and S4 flavor symmetries as the only intermediate gauge group between the standard model and the scale of unification of the three coupling constants are presented. We shall assume that there i... see more

Pags. 1 - 6  

Tran Huu Phat,Nguyen Van Thu

The pion condensation and chiral phase transition are studied within the linear sigma model with constituent quarks (LSMq). In the chiral limit the pion condensation is always the first-order phase transition and the phase diagrams of the pion condensate ... see more

Pags. 15 - 31  

Nguyen Toan Thang,Pham Thi Thanh Nga

We study the Néel state of the spin 1/2 Heisenberg antiferromagnet model on hypercubic and triangular lattices, employing an auxiliary fermion representation for spin operators with Popov-Fedotov trick. The unphysical states are eliminated on each site b... see more

Pags. 33 - 43  

Dinh Van Tuan,Nguyen Quoc Khanh

We calculate the dynamical dielectric function of doped double-layer graphene (DLG), made of two parallel graphene monolayers with carrier densities n1,n2n_1, n_2, respectively, and a separation interlayer of dd at finite temperature. The results are use... see more

Pags. 45 - 51  

Vu Kim Thai,Le Duc Anh,Hoang Anh Tuan

We consider a model of III-V diluted magnetic semiconductors where both of the exchange interaction between carrier and impurity spins, and the direct exchange interaction between magnetic impurities are taken into account. The magnetization as a function... see more

Pags. 53 - 58  

Tran Thanh Thai,Pham Phi Hung,Vo Thach Son,Vu Thi Bich

Polycrystalline CuInS2_{2} (CIS) absorber films for solar cells were prepared by spray pyrolysis of aqueuos solution of copper chloride, indium chloride and thiourea onto heated glass substrates. By optimizing the spray parameters, such as reducing/inc... see more

Pags. 59 - 64  

Ngo Dinh Sang,Pham Hong Quang,Do Quang Ngoc

Pulsed Electron Deposition (PED) is a novel technique that can be applied for growing high quality thin films. In this technique, we used an electron beam with a focused diameter of about 1 mm, the energy up to 15 kV, the frequency of 1-10 Hz, the puls... see more

Pags. 65 - 73  

Pham Duc Khue,Kim Tien Thanh,Nguyen Van Do

The yield ratio of the high-spin state of 122mSb(8-)^{122m}\text{Sb} (8^{ - }) and the low-spin state of 122gSb(2-)^{122g}\text{Sb} (2^{-}) formed via the 123Sb(?,n)122m,gSb^{123}\text{Sb}(\gamma, n)^{122m,g}\text{Sb}  reaction has been measured as a... see more

Pags. 75 - 81  

Nguyen Mau Chung,Nguyen Thi Dung,Tran Minh Tam

The ratio of prompt ?+/?-\Xi^+/\Xi^- production has been investigated from a limitedsample of data registered by the LHCb experiment at the CERN Large Hadron Colliderin 2010. This ratio has been determined in the rapidity region 1.9=y=4.91.... see more

Pags. 83 - 90  

Nguyen Tuan Khai,Bui Duy Linh,Tran Duc Thiep,Y. Fujita,T Adachi,H. Fujita,A. Tamii

Under the assumption that isospin TT is a good quantum number, mirror transitions Tz=+1?0T_{z }= +1 \to  0 and Tz=-1?0T_{z }= -1  \to  0 were studied in A=34A = 34 isobars, where TzT_{z} is zz component of iospin TT and is defined by T... see more

Pags. 91 - 96