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NMR study of heavy-fermion system α-YbAlB4


Grbić, Mihael Srđan; Kimura, Kazuhiro; Yoshida, Makoto; Takigawa, Masashi; Kuga, Kentaro; Nakatsuji, Satoru
NMR study of heavy-fermion system α-YbAlB4 // Abstracts of the Fall meeting of the Physical Society of Japan
Tokušima, 2013. (predavanje, međunarodna recenzija, sažetak, znanstveni)


Naslov
NMR study of heavy-fermion system α-YbAlB4

Autori
Grbić, Mihael Srđan ; Kimura, Kazuhiro ; Yoshida, Makoto ; Takigawa, Masashi ; Kuga, Kentaro ; Nakatsuji, Satoru

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the Fall meeting of the Physical Society of Japan / - Tokušima, 2013

Skup
Fall meeting of the Physical Society of Japan

Mjesto i datum
Tokušima, Japan, 25-28.9.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
criticality; valence transition; heavy fermion; nmr

Sažetak
α-YbAlB4, a heavy fermion compound with Fermi-liquid ground state at zero magnetic field, shows signs of a metamagnetic transition [1] occurring close to H = 3 T. This intriguing fluctuating-valence system is an isomorph of β-YbAlB4 where quantum criticality [2] and low-temperature superconductivity [3] manifest at zero magnetic field. Through NMR on 27Al and 11B nuclei we inspect the nature of the transition in α-YbAlB4, and determine the underlying H-T phase diagram. Magnetic field dependence of the spin-lattice relaxation rate at low temperatures shows a maximum occurring in the vicinity of 2 T and 3.5 T, with a power-law temperature divergence indicating a quantum critical behaviour. We will discuss the observed magnetic field dependence of NMR data in the view of current theoretical models that account for quantum criticality in heavy fermion systems. [1] E.T.C. O’Farrell, K. Kuga, Y. Matsumoto, S. Nakatsuji et al., in preparation [2] Y. Matsumoto, S. Nakatsuji et al., Science 331, 316 (2011). [3] S. Nakatsuji et al., Nat. Phys. 4, 603 (2008).

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
119-1191458-1022 - Mikrovalna istraživanja novih materijala (Miroslav Požek, )

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Profili:

Avatar Url Mihael Srđan Grbić (autor)

Citiraj ovu publikaciju

Grbić, Mihael Srđan; Kimura, Kazuhiro; Yoshida, Makoto; Takigawa, Masashi; Kuga, Kentaro; Nakatsuji, Satoru
NMR study of heavy-fermion system α-YbAlB4 // Abstracts of the Fall meeting of the Physical Society of Japan
Tokušima, 2013. (predavanje, međunarodna recenzija, sažetak, znanstveni)
Grbić, M., Kimura, K., Yoshida, M., Takigawa, M., Kuga, K. & Nakatsuji, S. (2013) NMR study of heavy-fermion system α-YbAlB4. U: Abstracts of the Fall meeting of the Physical Society of Japan.
@article{article, year = {2013}, keywords = {criticality, valence transition, heavy fermion, nmr}, title = {NMR study of heavy-fermion system α-YbAlB4}, keyword = {criticality, valence transition, heavy fermion, nmr}, publisherplace = {Toku\v{s}ima, Japan} }