skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Zero bias anomaly in Andreev reflection spectroscopy

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4965983· OSTI ID:1388935

Zero bias anomalies have been observed in point contact Andreev reflection spectroscopy using conventional superconductors, and they cannot be suppressed by a highly spin-polarized current. By systematically varying the size of the point contact, the anomalies are found to be evolved from conductance dips outside the superconducting gap. Furthermore, these anomalies, which depend on the size of the interface, are not intrinsic to the superconductors but due to a large resistance change when the contact region is driven to normal by an Oersted field.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012670
OSTI ID:
1388935
Alternate ID(s):
OSTI ID: 1330115
Journal Information:
Journal of Applied Physics, Vol. 120, Issue 16; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (27)

Continuous control of spin polarization using a magnetic field journal May 2016
Unified Formalism of Andreev Reflection at a Ferromagnet/Superconductor Interface journal October 2012
Detection of orbital fluctuations above the structural transition temperature in the iron pnictides and chalcogenides journal June 2012
Point-contact spectroscopic studies on normal and superconducting AFe 2 As 2 -type iron pnictide single crystals journal April 2010
Tunneling Spectroscopy in AlNiCo Decagonal Quasicrystals journal February 1999
Sulfur stoichiometry effects in highly spin polarized CoS2 single crystals journal June 2006
Switching by point-contact spin injection in a continuous film journal January 2004
Finite-bias resistance peaks in nanoscale superconductor–normal-metal Ta-W point contacts journal June 1999
Topological Superconductivity in Cu x Bi 2 Se 3 journal November 2011
Andreev scattering and the Kondo effect journal February 2000
Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices journal April 2012
Measurement of spin polarization of single crystals of La 0.7 Sr 0.3 MnO 3 and La 0.6 Sr 0.4 MnO 3 journal July 2002
C o 1 x F e x S 2 : A Tunable Source of Highly Spin-Polarized Electrons journal February 2005
Pronounced effects of additional resistance in Andreev reflection spectroscopy journal June 2010
Measuring the Spin Polarization of a Metal with a Superconducting Point Contact journal October 1998
Majorana Fermion Induced Resonant Andreev Reflection journal December 2009
Fabrication of highly spin-polarized Co 2 FeAl 0.5 Si 0.5 thin-films journal April 2014
Probing Ferromagnets with Andreev Reflection journal October 1998
Enhanced Curie temperature and spin polarization in Mn4FeGe3 journal October 2007
Role of critical current on the point-contact Andreev reflection spectra between a normal metal and a superconductor journal April 2004
Symmetry of the order parameter in the high-Tc superconductor YBa2Cu3O7- δ journal January 1995
Insulator-metal transition and giant magnetoresistance in La 1 x Sr x MnO 3 journal May 1995
Effect of three dimensional interface in determination of spin polarization using Andreev reflection spectroscopy journal May 2013
“Giant” Enhancement of the Upper Critical Field and Fluctuations above the Bulk T c in Superconducting Ultrathin Lead Nanowire Arrays journal April 2013
Half-metallicity in highly L21-ordered CoFeCrAl thin films journal October 2016
Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion journal April 1982
Scanning tunneling spectroscopy of high-temperature superconductors journal March 2007

Cited By (1)

Superconductivity induced at a point contact on the topological semimetal tungsten carbide journal December 2019