Zobrazeno 1 - 10
of 96
pro vyhledávání: '"P D Graf"'
Publikováno v:
npj Quantum Materials, Vol 9, Iss 1, Pp 1-8 (2024)
Abstract Superconductivity of iron chalocogenides is strongly enhanced under applied pressure yet its underlying pairing mechanism remains elusive. Here, we present a quantum oscillations study up to 45 T in the high-T c phase of tetragonal FeSe0.82S
Externí odkaz:
https://doaj.org/article/d481613c15f7427daf92372803e0fa0e
Autor:
D. J. Campbell, J. Collini, J. Sławińska, C. Autieri, L. Wang, K. Wang, B. Wilfong, Y. S. Eo, P. Neves, D. Graf, E. E. Rodriguez, N. P. Butch, M. Buongiorno Nardelli, J. Paglione
Publikováno v:
npj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021)
Abstract The helimagnet FeP is part of a family of binary pnictide materials with the MnP-type structure, which share a nonsymmorphic crystal symmetry that preserves generic band structure characteristics through changes in elemental composition. It
Externí odkaz:
https://doaj.org/article/3c0a37e0c0d247148251152d4c4ba504
Autor:
Zhixiang Hu (胡之翔), Jahyun Koo, Yong Hu (胡勇), Qi Wang (王琦), Milinda Abeykoon, D. Graf, Yu Liu (刘育), Hechang Lei (雷和畅), Junzhang Ma (馬均章), Ming Shi (史明), Binghai Yan (颜丙海), C. Petrovic
Publikováno v:
Physical Review Research, Vol 5, Iss 1, p 013079 (2023)
Dirac semimetals feature Dirac cones with topologically nontrivial states in the bulk that are protected by crystalline symmetries. They attract considerable attention due to rich quantum states and properties of interest, such as high Fermi velociti
Externí odkaz:
https://doaj.org/article/c87bf67b9f2f4888b4ccf22e8c1640a4
Autor:
S. A. Zvyagin, D. Graf, T. Sakurai, S. Kimura, H. Nojiri, J. Wosnitza, H. Ohta, T. Ono, H. Tanaka
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-5 (2019)
Theoretical studies of quantum magnetism typically assume idealised lattices with freely tunable parameters, which are difficult to realise experimentally. Zvyagin et al. perform challenging measurements at high pressures to tune and to accurately mo
Externí odkaz:
https://doaj.org/article/46d4c3b78de94704aff101d8cf7257e6
Autor:
N. Doiron-Leyraud, O. Cyr-Choinière, S. Badoux, A. Ataei, C. Collignon, A. Gourgout, S. Dufour-Beauséjour, F. F. Tafti, F. Laliberté, M.-E. Boulanger, M. Matusiak, D. Graf, M. Kim, J.-S. Zhou, N. Momono, T. Kurosawa, H. Takagi, Louis Taillefer
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
High-temperature superconductors exhibit pseudogap behaviour that remains of unknown origin, despite many years of intensive study. Here the authors study the onset of the pseudogap under pressure, providing evidence that it requires a hole-like Ferm
Externí odkaz:
https://doaj.org/article/203ec510f0e74bb3b73c4c91e7fd01f9
Autor:
J. Y. Liu, J. Hu, D. Graf, T. Zou, M. Zhu, Y. Shi, S. Che, S. M. A. Radmanesh, C. N. Lau, L. Spinu, H. B. Cao, X. Ke, Z. Q. Mao
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-8 (2017)
The transport behavior of the carriers residing in the lowest Landau level is hard to observe in most topological materials. Here, Liu et al. report a surprising angular dependence of the interlayer magnetoresistivity and Hall conductivity arising fr
Externí odkaz:
https://doaj.org/article/2fda24c16d5a43aba09a83a3180d5b07
Autor:
A. Gourgout, A. Ataei, M.-E. Boulanger, S. Badoux, S. Thériault, D. Graf, J.-S. Zhou, S. Pyon, T. Takayama, H. Takagi, Nicolas Doiron-Leyraud, Louis Taillefer
Publikováno v:
Physical Review Research, Vol 3, Iss 2, p 023066 (2021)
We report thermopower measurements under hydrostatic pressure on the cuprate superconductor La_{1.6−x}Nd_{0.4}Sr_{x}CuO_{4} (Nd-LSCO), at low temperature in the normal state accessed by suppressing superconductivity with a magnetic field up to H=31
Externí odkaz:
https://doaj.org/article/22c7e5bebe7c4e26be1034ddbf468317
Autor:
S. Haravifard, D. Graf, A. E. Feiguin, C. D. Batista, J. C. Lang, D. M. Silevitch, G. Srajer, B. D. Gaulin, H. A. Dabkowska, T. F. Rosenbaum
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
Spin 1/2 dimer systems in an external magnetic field behave as a lattice gas of hard-core bosons, and can undergo condensation. Here the authors show in SrCu2(BO3)2that new fractionally crystallized states are not only possible, but also tuneable wit
Externí odkaz:
https://doaj.org/article/10ae66b1f66840f9bbc85162a84206e7
Autor:
N. Kikugawa, P. Goswami, A. Kiswandhi, E. S. Choi, D. Graf, R. E. Baumbach, J. S. Brooks, K. Sugii, Y. Iida, M. Nishio, S. Uji, T. Terashima, P.M.C. Rourke, N. E. Hussey, H. Takatsu, S. Yonezawa, Y. Maeno, L. Balicas
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016)
In Weyl semimetals, unusual electronic transport phenomena are predicted to occur, such as an axial anomaly which violates the conservation of chiral fermions. Here, the authors evidence such behaviour via the occurrence of negative magnetoresistance
Externí odkaz:
https://doaj.org/article/9ec38db1fb5f43c0bc8d2e339668f291
Autor:
A. Gallagher, K.-W. Chen, C. M. Moir, S. K. Cary, F. Kametani, N. Kikugawa, D. Graf, T. E. Albrecht-Schmitt, S. C. Riggs, A. Shekhter, R. E. Baumbach
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-5 (2016)
The heavy fermion compound URu2Si2displays a hidden order phase and superconductivity at low temperatures. Here, the authors perform substitution studies—partially replacing silicon with phosphorus—and study the effects on hidden order and superc
Externí odkaz:
https://doaj.org/article/93d287b062ec472aadf9dbb2972a48b4