Earticle

초록

영어

The current study deals with the possible interplay between superconductivity and spin density wave in two band model high temperature iron based superconductor (FeBSC) Ba1-xNaxFe2As2. The electron and hole bands in the presence of the inter-band interaction between the two bands is becoming a vital issue to deal with the high temperature physics of the iron-based superconductors. In this research work, a model Hamiltonian appropriate for the system under consideration has been developed and the temperature dependent Green's function technique has been employed to get the solution for the equations of motion constructed for the two band model high temperature FeBSC Ba1-xNaxFe2As2. By making use of the decoupling procedure, the equations of motion for the dependence of superconducting transition temperature (TC) on spin density wave(SDW) order parameter (ΔSDW) in the electron intra-band (Δ𝑠𝑐(𝑒)) , hole intra-band (Δ𝑠𝑐(ℎ)) and inter-band (Δ𝑠𝑐(𝑒ℎ)) for Ba1-xNaxFe2As2 have been obtained. We have also obtained the expression for the dependence of spin density wave transition temperature(TSDW) on ΔSDW for Ba1-xNaxFe2As2. Using some plausible approximations and appropriate experimental values for the parameters in the obtained equations of motion, phase diagrams of TC versus Δ𝑠𝑐(𝑒), Δ𝑠𝑐(ℎ) and Δ𝑠𝑐(𝑒ℎ) are plotted. Furthermore, a phase diagram of TSDW versus Δ𝑆𝐷𝑊 is plotted for the material under consideration. Finally, using the above mentioned phase diagrams, the interplay between superconductivity and spin density wave in the two band model high temperature FeBSC Ba1-xNaxFe2As2 has been demonstrated to be a very distinct possibility. The agreement of the current finding with the experimental observations is quite commendable.

목차

Abstract
1. INTRODUCTION
2. SYSTEM OF HAMILTONIAN FORMATION IN TWO BAND MODEL FeBSC
2.1. EQUATIONS OF MOTION FOR INTRA AND INTER BANDS OF THE FeBSC Ba1-xNaxFe2As2
2.2. SUPERCONDUCTING TRANSITION TEMPERATURE DEPENDANCE ON SPIN DENSITY WAVE ORDER PARAMETER FOR THE ELECTRON INTRA BAND
2.3. SUPERCONDUCTING TRANSITION TEMPERATURE DEPENDANCE ON SPIN DENSITY WAVE ORDER PARAMETER FOR HOLE INTERA BAND
2.4. DEPENDANCE OF SUPERCONDUCTING TRANSITION TEMPERATURE ON SPIN DENSITY WAVE ORDER PARAMETER FOR THE INTER BAND BETWEEN THE ELECTRON AND HOLE BANDS
2.5. DEPENDANCE OF SPIND DENSITY WAVE TRANSITION TEMPERATURE ON SPIN DENSITY WAVE ORDER PARAMETER
2.6. DEPENDANCE OF SPIN DENSITY WAV EORDER PARAMETER ON TEMPERATURE IN PURE SPIN DENSITY WAVE REGION
3. RESULT AND DISCUSIONS
4. CONCLUSIONS
CONFLICTS OF INTEREST
REFERENCES

키워드

저자

• Teklie Lissanu Tegegne [ Injibara University, Department of Physics, P.O. Box 40, Injibara, Ethiopia ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537