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Title: Topological properties of ferromagnetic superconductors

Abstract

Here, a variety of heavy fermion superconductors, such as UCoGe, UGe 2, and URhGe exhibit a striking coexistence of bulk ferromagnetism and superconductivity. In the first two materials, the magnetic moment decreases with pressure, and vanishes at a ferromagnetic quantum critical point (qcp). Remarkably, the superconductivity in UCoGe varies smoothly with pressure across the qcp and exists in both the ferromagnetic and paramagnetic regimes. We argue that in UCoGe, spin-orbit interactions stabilize a time-reversal invariant odd-parity superconductor in the high pressure paramagnetic regime. Based on a simple phenomenological model, we predict that the transition from the paramagnetic normal state to the phase where superconductivity and ferromagnetism coexist is a first-order transition.

Authors:
 [1];  [2]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1257745
Alternate Identifier(s):
OSTI ID: 1249944
Report Number(s):
SLAC-PUB-16553
Journal ID: ISSN 2469-9950
Grant/Contract Number:
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 13; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Cheung, Alfred K. C., and Raghu, S. Topological properties of ferromagnetic superconductors. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.134516.
Cheung, Alfred K. C., & Raghu, S. Topological properties of ferromagnetic superconductors. United States. doi:10.1103/PhysRevB.93.134516.
Cheung, Alfred K. C., and Raghu, S. Wed . "Topological properties of ferromagnetic superconductors". United States. doi:10.1103/PhysRevB.93.134516. https://www.osti.gov/servlets/purl/1257745.
@article{osti_1257745,
title = {Topological properties of ferromagnetic superconductors},
author = {Cheung, Alfred K. C. and Raghu, S.},
abstractNote = {Here, a variety of heavy fermion superconductors, such as UCoGe, UGe2, and URhGe exhibit a striking coexistence of bulk ferromagnetism and superconductivity. In the first two materials, the magnetic moment decreases with pressure, and vanishes at a ferromagnetic quantum critical point (qcp). Remarkably, the superconductivity in UCoGe varies smoothly with pressure across the qcp and exists in both the ferromagnetic and paramagnetic regimes. We argue that in UCoGe, spin-orbit interactions stabilize a time-reversal invariant odd-parity superconductor in the high pressure paramagnetic regime. Based on a simple phenomenological model, we predict that the transition from the paramagnetic normal state to the phase where superconductivity and ferromagnetism coexist is a first-order transition.},
doi = {10.1103/PhysRevB.93.134516},
journal = {Physical Review B},
number = 13,
volume = 93,
place = {United States},
year = {Wed Apr 27 00:00:00 EDT 2016},
month = {Wed Apr 27 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
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