17 Result(s)

Article

Intra-unit-cell electronic nematicity of the high-T_c copper-oxide pseudogap states

Within the pseudogap phase of the high-T_c superconductors, it has been unclear which electronic symmetries (if any) are broken, what the identity of any associated order parameter might be, and which microscopic ...

M. J. Lawler, K. Fujita, Jhinhwan Lee, A. R. Schmidt, Y. Kohsaka, Chung Koo Kim… in Nature (2010)

Article

Imaging the Fano lattice to ‘hidden order’ transition in URu₂Si₂

Within a Kondo lattice, the strong hybridization between electrons localized in real space (r-space) and those delocalized in momentum-space (k-space) generates exotic electronic states called ‘heavy fermions’. I...

A. R. Schmidt, M. H. Hamidian, P. Wahl, F. Meier, A. V. Balatsky, J. D. Garrett… in Nature (2010)

Article

How Cooper pairs vanish approaching the Mott insulator in Bi₂Sr₂CaCu₂O_8+δ

The antiferromagnetic ground state of copper oxide Mott insulators is achieved by localizing an electron at each copper atom in real space (r-space). Removing a small fraction of these electrons (hole do**) tra...

Y. Kohsaka, C. Taylor, P. Wahl, A. Schmidt, Jhinhwan Lee, K. Fujita… in Nature (2008)

Article

Interplay of electron–lattice interactions and superconductivity in Bi₂Sr₂CaCu₂O_8+δ

Formation of electron pairs is essential to superconductivity. For conventional superconductors, tunnelling spectroscopy has established that pairing is mediated by bosonic modes (phonons); a peak in the secon...

**ho Lee, K. Fujita, K. McElroy, J. A. Slezak, M. Wang, Y. Aiura, H. Bando… in Nature (2006)

Article

A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca_2-xNa_xCuO₂Cl₂

The phase diagram of hole-doped copper oxides shows four different electronic phases existing at zero temperature. Familiar among these are the Mott insulator, high-transition-temperature superconductor and me...

T. Hanaguri, C. Lupien, Y. Kohsaka, D.-H. Lee, M. Azuma, M. Takano, H. Takagi… in Nature (2004)

Article

Relating atomic-scale electronic phenomena to wave-like quasiparticle states in superconducting Bi₂Sr₂CaCu₂O_8+δ

The electronic structure of simple crystalline solids can be completely described in terms either of local quantum states in real space (r-space), or of wave-like states defined in momentum-space (k-space). Howev...

K. McElroy, R. W. Simmonds, J. E. Hoffman, D.-H. Lee, J. Orenstein, H. Eisaki… in Nature (2003)

Article

Imaging the granular structure of high-T_c superconductivity in underdoped Bi₂Sr₂CaCu₂O_8+δ

Granular superconductivity occurs when microscopic superconducting grains are separated by non-superconducting regions; Josephson tunnelling between the grains establishes the macroscopic superconducting state¹. ...

K. M. Lang, V. Madhavan, J. E. Hoffman, E. W. Hudson, H. Eisaki, S. Uchida… in Nature (2002)

Article

Microscopic electronic inhomogeneity in the high-T_c superconductor Bi₂Sr₂CaCu₂O_8+x

The parent compounds of the copper oxide high-transition-temperature (high-T_c) superconductors are unusual insulators (so-called Mott insulators). Superconductivity arises when they are ‘doped’ away from stoichio...

S. H. Pan, J. P. O'Neal, R. L. Badzey, C. Chamon, H. Ding, J. R. Engelbrecht… in Nature (2001)

Article

Quantum interference of superfluid ³He

Celebrated interference experiments have demonstrated the wave nature of light¹ and electrons², quantum interference being the manifestation of wave–particle duality. More recently, double-path interference exper...

R. W. Simmonds, A. Marchenkov, E. Hoskinson, J. C. Davis, R. E. Packard in Nature (2001)

Article

Interplay of magnetism and high-T_c superconductivity at individual Ni impurity atoms in Bi₂Sr₂CaCu₂O_8+δ

Magnetic interactions and magnetic impurities are destructive to superconductivity in conventional superconductors¹. By contrast, in some unconventional macroscopic quantum systems (such as superfluid ³He and sup...

E. W. Hudson, K. M. Lang, V. Madhavan, S. H. Pan, H. Eisaki, S. Uchida… in Nature (2001)

Article

Imaging the effects of individual zinc impurity atoms on superconductivity in Bi₂Sr₂CaCu₂O_8+δ

Although the crystal structures of the copper oxide high-temperature superconductors are complex and diverse, they all contain some crystal planes consisting of only copper and oxygen atoms in a square lattice...

S. H. Pan, E. W. Hudson, K. M. Lang, H. Eisaki, S. Uchida, J. C. Davis in Nature (2000)

Article

Observation of ‘third sound’ in superfluid ³He

Waves on the surface of a fluid provide a powerful tool for studying the fluid itself and the surrounding physical environment. For example, the wave speed is determined by the force per unit mass at the surfa...

A. M. R. Schechter, R. W. Simmonds, R. E. Packard, J. C. Davis in Nature (1998)

Article

Discovery of a metastable π-state in a superfluid ³He weak link

Under certain circumstances¹,², a superconducting Josephson junction can maintain a quantum phase difference of π between the two samples that are weakly connected to form the junction. Such systems are called ‘π...

S. Backhaus, S. Pereverzev, R. W. Simmonds, A. Loshak, J. C. Davis, R. E. Packard in Nature (1998)

Article

Quantum oscillations between two weakly coupled reservoirs of superfluid ³He

Arguments first proposed over thirty years ago, based on fundamental quantum-mechanical principles, led to the prediction^1,2,3 that if macroscopic quantum systems are weakly coupled together, particle currents sh...

S. V. Pereverzev, A. Loshak, S. Backhaus, J. C. Davis, R. E. Packard in Nature (1997)

Article

Failure of the Antibody Method to demonstrate a Circulating Hormonal Factor after Partial Hepatectomy

ALTHOUGH the extremely rapid regeneration of the liver that occurs after partial hepatectomy has been known for many years¹, the mechanism remains obscure. Many authors have suggested that the cell proliferation ...

T. A. HYDE, L. J. HIPKIN, J. C. DAVIS in Nature (1966)

Article

Cytology of the Adenohypophysis

J. C. DAVIS in Nature (1965)