As a way to investigate the transport property of superconductor-insulator-superconductor (SIS) junction with two-gap superconductors such as MgB2 and iron superconductors, we study the microscopic structure of the Josephson current in a tunnel junction with a very narrow quasi-classical barrier. Also, the possibility of mid-gap states in two-gap superconductor is investigated, and their effects on the current-phase relation as well as the current density characteristics are studied. In the SIS break junction, mid-gap states appear at the Superconductor-Insulator interfaces due to an abrupt change in the superconducting order parameter, indicating that the two-gap superconductor SIS junction can yield a rich bound state structure in the energy gap. In this work, I study the mid-gap bound state energy of the two-gap superconductor-based short Josephson junctions. Also, I study the tunneling currents through the mid-gap states theoretically to estimate the effects of these bound states on the current-phase characteristics and the critical Josephson current.
","abstract_html":"<p>As a way to investigate the transport property of superconductor-insulator-superconductor (SIS) junction with two-gap superconductors such as MgB2 and iron superconductors, we study the microscopic structure of the Josephson current in a tunnel junction with a very narrow quasi-classical barrier. Also, the possibility of mid-gap states in two-gap superconductor is investigated, and their effects on the current-phase relation as well as the current density characteristics are studied. In the SIS break junction, mid-gap states appear at the Superconductor-Insulator interfaces due to an abrupt change in the superconducting order parameter, indicating that the two-gap superconductor SIS junction can yield a rich bound state structure in the energy gap. In this work, I study the mid-gap bound state energy of the two-gap superconductor-based short Josephson junctions. Also, I study the tunneling currents through the mid-gap states theoretically to estimate the effects of these bound states on the current-phase characteristics and the critical Josephson current.</p>","abstract_has_math":false,"creators":["Bahrainirad, Ladan"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Physics & Astrophysics","degree_department":null,"school":null,"contributors":["Ju H Kim"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-01-01T08:00:00Z","date_published":"2013-01-01T08:00:00Z","updated_at":"2026-07-24T03:26:24Z","subjects":["Bound state energy, interference effect, Josephson current, Mid-gap states, SUPERCONDUCTOR-INSULATOR- SUPERCONDUCTOR JUNCTIONS, Two- gap Superconductor"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://commons.und.edu/theses/1395","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ju H Kim"]},{"key":"dc:creator","label":"Author","values":["Bahrainirad, Ladan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics & Astrophysics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Bound state energy, interference effect, Josephson current, Mid-gap states, SUPERCONDUCTOR-INSULATOR- SUPERCONDUCTOR JUNCTIONS, Two- gap Superconductor"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://commons.und.edu/theses/1395"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["As a way to investigate the transport property of superconductor-insulator-superconductor (SIS) junction with two-gap superconductors such as MgB2 and iron superconductors, we study the microscopic structure of the Josephson current in a tunnel junction with a very narrow quasi-classical barrier. Also, the possibility of mid-gap states in two-gap superconductor is investigated, and their effects on the current-phase relation as well as the current density characteristics are studied. In the SIS break junction, mid-gap states appear at the Superconductor-Insulator interfaces due to an abrupt change in the superconducting order parameter, indicating that the two-gap superconductor SIS junction can yield a rich bound state structure in the energy gap. In this work, I study the mid-gap bound state energy of the two-gap superconductor-based short Josephson junctions. Also, I study the tunneling currents through the mid-gap states theoretically to estimate the effects of these bound states on the current-phase characteristics and the critical Josephson current.
"]},{"key":"dc:title","label":"Title","values":["Josephson Currents In Two-Gap Superconductor-Insulator- Superconductor Junctions"]}]}],"canonical_facts":{"dc:contributor":["Ju H Kim"],"dc:creator":["Bahrainirad, Ladan"],"dc:description.abstract":["As a way to investigate the transport property of superconductor-insulator-superconductor (SIS) junction with two-gap superconductors such as MgB2 and iron superconductors, we study the microscopic structure of the Josephson current in a tunnel junction with a very narrow quasi-classical barrier. Also, the possibility of mid-gap states in two-gap superconductor is investigated, and their effects on the current-phase relation as well as the current density characteristics are studied. In the SIS break junction, mid-gap states appear at the Superconductor-Insulator interfaces due to an abrupt change in the superconducting order parameter, indicating that the two-gap superconductor SIS junction can yield a rich bound state structure in the energy gap. In this work, I study the mid-gap bound state energy of the two-gap superconductor-based short Josephson junctions. Also, I study the tunneling currents through the mid-gap states theoretically to estimate the effects of these bound states on the current-phase characteristics and the critical Josephson current.
"],"dc:identifier":["https://commons.und.edu/theses/1395"],"dc:subject":["Bound state energy, interference effect, Josephson current, Mid-gap states, SUPERCONDUCTOR-INSULATOR- SUPERCONDUCTOR JUNCTIONS, Two- gap Superconductor"],"dc:title":["Josephson Currents In Two-Gap Superconductor-Insulator- Superconductor Junctions"],"thesis:degree_discipline":["Physics & Astrophysics"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T03:26:24Z"}