Interplay of Nuclear Magnetism and Superconductivity in AuI<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">n</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Rehmann, S.; Herrmannsdörfer, T.; Pobell, F.

doi:10.1103/physrevlett.78.1122

Cited by 56 publications

(30 citation statements)

References 18 publications

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“…So, the nuclear magnetism in AuIn 2 , which shows strong tendency toward ferromagnetism, competes rather strongly with SC. It was estimated from the experiment [5] that…”

Section: Coexistence Of Nuclear Magnetism and Superconductivitymentioning

confidence: 99%

Conventional magnetic superconductors: coexistence of singlet superconductivity and magnetic order

Kulić

2006

Comptes Rendus. Physique

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The basic physics of bulk magnetic superconductors (MS) related to the problem of the coexistence of singlet superconductivity (SC) and magnetic order is reviewed. The interplay between exchange (EX) and electromagnetic (EM) interaction is discussed and argued that the singlet SC and uniform ferromagnetic (F) order practically never coexist. In case of their mutual coexistence the F order is modified into a domain-like or spiral structure depending on magnetic anisotropy. It turns out that this situation is realized in several superconductors such as ErRh 4 B 4 , HoM o 6 S 8 , HoM o 6 Se 8 with electronic and in AuIn 2 with nuclear magnetic order. The later problem is also discussed here.The coexistence of SC and antiferromagnetism is more favorable than with the modified F order. Very interesting physics is realized in systems with SC and weakferromagnetism which results in an very reach phase diagram.The properties of magnetic superconductors in magnetic field are very peculiar, especially near the (ferro)magnetic transition temperature where the upper critical field becomes smaller than the thermodynamical critical field.The extremely interesting physics of Josephson junctions based on MS with spiral magnetic order is also discussed. The existence of the triplet pairing amplitude F ↑↑ (F ↓↓ ) in MS with rotating magnetization (the effect recently rediscovered in SFS junctions) gives rise to the so called π-contact. Furthermore, the interplay of the superconducting and magnetic phase in such a contact renders possibilities for a new type of coupled Josephson-qubits.

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“…So, the nuclear magnetism in AuIn 2 , which shows strong tendency toward ferromagnetism, competes rather strongly with SC. It was estimated from the experiment [5] that…”

Section: Coexistence Of Nuclear Magnetism and Superconductivitymentioning

confidence: 99%

Conventional magnetic superconductors: coexistence of singlet superconductivity and magnetic order

Kulić

2006

Comptes Rendus. Physique

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“…[2], [3], [4]. Recently, the coexistence of superconductivity and nuclear magnetism was found experimentally in AuIn 2 [5] and explained theoretically [6] in terms of a spiral or a domain-like structure . There is also evidence for the coexistence of ferromagnetism, which appears at T M = 137 K, and superconductivity, which sets in at T c = 45 K, in the layered perovskite superconductor RuSr 2 GdCu 2 O 8 [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic-semiconductor–singlet-(or triplet) superconductor–ferromagnetic-semiconductor systems as possible logic circuits and switches

Kulić

Endres

2000

Phys. Rev. B

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We consider thin superconducting (S) films of thickness d ≪ ξ 0 , sandwiched between two ferromagnetic semiconducting insulators (F I) with differently orientated magnetizations -the F I − S − F I system. We calculate the dependence of the superconducting critical temperature on the orientation of the magnetization in the insulators and on the thickness of the superconducting film. The calculations are done for singlet as well as triplet superconductors. In the singlet case T c depends on the relative orientation of the left and right magnetization only, while in the triplet case T c depends on the absolute orientation of magnetization. The latter property can serve as a kind of spin-spectroscopy of triplet and unconventional superconductors, for instance in resolving the structure of the triplet order parameter in the recently discovered layered superconductor Sr 2 RuO 4 . The possibility of logic circuits and switches, which are based on the F I − S − F I systems with arbitrary orientation of magnetizations in F I films, is analyzed too.

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“…Electron-nuclear spin interactions in solids have attracted much interest recently [20][21][22][23][24][25][26][27]. Typically, semiconductor materials contain of at least one stable elemental isotope with nonzero nuclear spin.…”

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confidence: 99%

“…The level of nuclear spin polarization can be probed by measurements of the resistance [20][21][22][23], precession frequency [25], position of the ferromagnetically ordered ground state of the two-dimensional electron gas [26], etc. The interplay between nuclear magnetism and superconductivity was studied in [27] for the first time.…”

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confidence: 99%

Spin Relaxation of Conduction Electrons in Semiconductors Due to Interaction with Nuclear Spins

Pershin

Privman

2003

Nano Lett.

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Relaxation of conduction electron spins in a semiconductor owing to the hyperfine interaction with spin-½ nuclei, in zero applied magnetic field, is investigated. We calculate the electron spin relaxation time scales, in order to evaluate the importance of this relaxation mechanism. Master equations for the electron spin density matrix are derived and solved. Polarized nuclear spins can be used to polarize the electrons in spintronic devices. Experimental work towards implementations of this proposal has been reported recently [3,4].A review of and list of references to the latest achievements in spintronics can be found in [5].Once injected into a semiconductor, electrons experience spin-dependent interactions with the environment, which can cause relaxation. Various relaxation mechanisms of the electron-spin state can result owing to coupling to phonons, magnetic and nonmagnetic impurities, nuclear spins, spins of other electrons [6], etc.; these mechanisms are due to the magnetic and spin-orbit interactions [7,8]. It is important to identify the primary mechanisms of relaxation for a particular system and evaluate how they limit the spin phase coherence.The main mechanisms of relaxation can be different for bounded and conduction electrons. Several recent works have identified the electron-nuclear spin relaxation mechanism as dominant at low temperatures, for electrons bounded in semiconductor quantum dots [9][10][11][12][13] or at donor impurities [13,14]. Three dominant spin-relaxation mechanisms for conduction electrons were suggested [15][16][17][18] and confirmed experimentally

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Interplay of Nuclear Magnetism and Superconductivity in AuIn2

Cited by 56 publications

References 18 publications

Conventional magnetic superconductors: coexistence of singlet superconductivity and magnetic order

Conventional magnetic superconductors: coexistence of singlet superconductivity and magnetic order

Ferromagnetic-semiconductor–singlet-(or triplet) superconductor–ferromagnetic-semiconductor systems as possible logic circuits and switches

Spin Relaxation of Conduction Electrons in Semiconductors Due to Interaction with Nuclear Spins

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