Probing the superconducting state via Andreev bound states in (La,Ce)2CuO4
Creators
- 1. Physikalisches Institut - Experimentalphysik II and Center for Collective Quantum Phenomena, Universitaet Tuebingen (Germany)
- 2. Institut fuer Theoretische Physik, Universitaet Tuebingen (Germany)
- 3. Department of Physics, Loughborough University (United Kingdom)
- 4. NTT Basic Research Laboratories, Atsugi-shi (Japan)
- 5. Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Garching (Germany)
Description
We present quasiparticle tunneling data of (La,Ce)2CuO4 thin film bicrystal junctions. The differential conductance in the superconducting state shows a pronounced zero bias conductance peak (ZBCP). This peak is attributed to zero energy surface Andreev bound states due to the d-wave symmetry of the order parameter in this electron doped cuprate. Such bound states are closely related to the macroscopic phase coherence of the superconducting state. Hence the ZBCP due to these bound states must disappear at or below the upper critical field Bc2(T). By following the disappearance of the ZBCP in the B-T-phase diagram we find a lower bound for Bc2(0)∼25 T which is higher than values reported previously for any electron doped cuprate. Following this observation we suggest a modified B-T-phase diagram with a larger region of superconductivity, leaving less room for a possible pseudogap phase
Availability note (English)
Also available online: http://www.dpg-tagungen.de/index_en.htmlAdditional details
Identifiers
Publishing Information
- Journal Title
- Verhandlungen der Deutschen Physikalischen Gesellschaft
- Journal Volume
- 43
- Journal Issue
- 1
- Journal Page Range
- [1 p.]
- ISSN
- 0420-0195
- CODEN
- VDPEAZ
Conference
- Title
- Physics Education, History of Physics, Radiation and Medical Physics as well as the Working Groups Equal Opportunities, Industry and Business, Information, Physics and Disarmament, Physics of Socio-economic Systems, Young DPG
- Original Conference Title
- 72. Jahrestagung und DPG (Deutsche Physikalische Gesellschaft e.V.) Fruehjahrstagung der Sektion Kondensierte Materie und den Fachverbaenden: Didaktik der Physik, Geschichte der Physik, Strahlen- und Medizinphysik und den Arbeitskreisen Chancengleichheit, Industrie und Wirtschaft, Information, Physik und Abruestung, Physik Sozio-oekonomischer Systeme, Junge DPG
- Acronym
- 72. annual meeting and DPG (Deutsche Physikalische Gesellschaft e.V.) Spring meeting of the Condensed Matter Section and the Divisions
- Dates
- 25-29 Feb 2008
- Place
- Berlin (Germany)
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 40090223
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BICRYSTALS; BOUND STATE; CERIUM COMPOUNDS; CRITICAL FIELD; CUPRATES; D WAVES; LANTHANUM COMPOUNDS; ORDER PARAMETERS; PHASE DIAGRAMS; QUASI PARTICLES; SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE; THIN FILMS; TUNNEL EFFECT
- Descriptors DEC
- COPPER COMPOUNDS; CRYSTALS; DIAGRAMS; DIMENSIONLESS NUMBERS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; FILMS; INFORMATION; MAGNETIC FIELDS; OXYGEN COMPOUNDS; PARTIAL WAVES; PHYSICAL PROPERTIES; POLYCRYSTALS; RARE EARTH COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- Session: TT 15.16 Di 14:00; No further information available