Anomalous behavior at a superconducting quantum critical point
نویسندگان
چکیده
منابع مشابه
Anomalous scaling at the quantum critical point in itinerant antiferromagnets.
We show that the Hertz phi(4) theory of quantum criticality is incomplete as it misses anomalous nonlocal contributions to the interaction vertices. For antiferromagnetic quantum transitions, we found that the theory is renormalizable only if the dynamical exponent z=2. The upper critical dimension is still d=4 - z=2; however, the number of marginal vertices at d=2 is infinite. As a result, the...
متن کاملFirst-order superconducting transition near a ferromagnetic quantum critical point.
We address the issue of how triplet superconductivity emerges in an electronic system near a ferromagnetic quantum critical point (FQCP). Previous studies found that the superconducting transition is of second order, and T(c) is strongly reduced near the FQCP due to pair-breaking effects from thermal spin fluctuations. In contrast, we demonstrate that near the FQCP, the system avoids pair-break...
متن کاملMagnetic and Superconducting Quantum Critical Behavior of Itinerant Electronic Systems
Quantum phase transitions occur at zero temperature as a function of some non-thermal parameter, e.g., pressure or chemical composition. In addition to being of fundamental interest, quantum phase transitions are important because they are believed to underlie a number of interesting low temperature phenomena. Quantum phase transitions differ from the classical phase transitions in many importa...
متن کاملAnomalous discontinuity at the percolation critical point of active gels
M. Sheinman, A. Sharma, J. Alvarado, G. H. Koenderink, F. C. MacKintosh Department of Physics and Astronomy, VU University, Amsterdam, The Netherlands Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands Department of Mechanical Engineering, Hatsopoulos Microfluids Laboratory, Massachusetts Institute of Tech...
متن کاملAnomalous critical fields in quantum critical superconductors
Fluctuations around an antiferromagnetic quantum critical point (QCP) are believed to lead to unconventional superconductivity and in some cases to high-temperature superconductivity. However, the exact mechanism by which this occurs remains poorly understood. The iron-pnictide superconductor BaFe2(As(1-x)P(x))2 is perhaps the clearest example to date of a high-temperature quantum critical supe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.56.5518